1 *******************************************
2 * HipHop Intermediate Representation (HHIR)
3 *******************************************
10 The HipHop Intermediate Representation (IR) is a typed, in-memory,
11 static-single-assignment, intermediate-level representation of HHBC programs
12 used for just in time compilation, with these goals:
14 1. Complete. The IR represents a program or program fragment entirely,
15 without reference to HHBC or other upstream forms of the program.
17 2. Type-Safe. Since the IR deals directly with refined types and internal VM
18 types, all operations are typesafe. All instruction parameters have a
19 parameter type P, and all variables have a type S. Given an instruction
20 with source parameter type P and variable type S, S must be equal to or
21 more refined than P (S == P or S <: P).
23 3. Machine Independent. Since this IR is intended to be used in a JIT
24 compiler, it will always be used in a machine specific context.
25 Nevertheless, we rely on machine independence in order to separate
26 concerns and increase portability of the VM. Passes which manipulate IR
27 based on PHP or HHBC semantics should be portable. Passes which deal with
28 machine specifics (such as register allocation) should be done in the
29 lower level IR (vasm). Types are machine independent.
31 The unit of compilation is the IRUnit, which is a collection of Blocks
32 containing IRInstructions that produce and consume SSATmp values. Blocks are
33 single-entry, single-exit sequences of instructions (i.e. basic
34 blocks). Instructions may be annotated with Type parameter which modifies the
35 instruction's behavior, or with additional compile-time constant data (see
36 extra-data.h). Each SSATmp has a Type which describes the set of values it may
37 hold, over its entire live range. Instructions may have side effects, which
38 occur in execution order.
40 The static single assignment form guarantees the following two invariants for a
41 well-formed compilation unit:
43 1. Each SSATmp is assigned to by exactly one IRInstruction.
45 2. Definitions dominate uses. Every path to an IRInstruction using an SSATmp
46 first executes the IRInstruction defining the SSATmp.
48 Any pass that generates or manipulates IR must preserve these invariants,
49 however it is possible and expected for the invariants to be temporarily broken
50 during IR generation or during an optimization pass.
56 IRUnits have one entry block, zero or more exit blocks, and zero or more catch
57 blocks. Exit blocks leave the compilation unit in the middle of the same PHP
58 function using one of several instructions that exit a compilation unit
59 (e.g. ReqBindJmp). Catch blocks are blocks that are reachable from exceptional
60 control flow edges, and are executed during unwinding if an exception
61 propagates through the instruction that had it as a `taken' edge.
63 No SSATmps are defined on entry to the main Block.
65 Blocks which are join points may start with a DefLabel with destination
66 SSATmps. In that case, each predecessor must be a Jmp passing a matching number
67 of sources. In this case the Jmp acts as a tail-call, passing arguments the
68 same way a plain call would.
70 Together, the sources of the Jmp instructions and the destinations of the
71 DefLabel instructions act as traditional SSA Phi pseudo-functions; The type of
72 the DefLabel's destination is the type-union of the corresponding sources.
73 Because the Jmp sources are at the ends of blocks, they do not violate the SSA
74 dominator rule (rule 2, above).
80 For an overview of the HHIR type system, see the "Type System" section in
81 hackers-guide/jit-core.md.
87 An SSATmp represents a virtual register. Since HHIR uses SSA, an SSATmp may
88 only be assigned to by one instruction. The type of an SSATmp represents the
89 set of values it may hold at the point it is defined, which is invariant over
90 the lifetime of the variable (from the definition point to the last use).
96 An instruction is an executable operation with zero or more inputs (sources),
97 zero or one result (destination), and possible side effects such as accessing
98 memory, doing I/O, and which may branch or throw an exception. Some
99 instructions have a Type parameter which modifies its behavior, or other "extra
100 data" in an arbitrary C++ struct (see extra-data.h).
102 Each instruction has a signature which describes its effect, parameter types,
103 and return type, for example:
105 IsType<T>, D(Bool), S(Cell), NF
107 The first column is the instruction name (and optional Type parameter in <>).
109 The second column describes the result (destination) using one of the D*
110 macros documented in hphp/runtime/vm/jit/ir-opcode.h, or ND for no destination.
112 The third column describes the sources, separated by whitespace, using macros
113 documented in hphp/runtime/vm/jit/ir-opcode.h, or NA if there are no sources.
115 The fourth column contains the flags, described below. The short name of the
116 flag (used in this file) is given first, with the long name that it expands to
117 in hphp/runtime/vm/jit/ir-opcode.cpp in parentheses after it.
121 The instruction has no flags.
125 The instruction produces a value with an unconsumed reference that must be
126 consumed, either by DecRefing it or storing it somewhere in memory.
130 The instruction consumes a reference to one or more of its sources, either by
131 decreasing its refcount or storing the reference to memory.
135 The instruction has no next instruction; it either jumps, returns, or throws.
139 The instruction has a (sometimes optional) taken edge. Instructions that are
140 conditional branches (i.e. a Branch that is not Terminal) will also have a
145 The value of the instruction's dest is the same as one of its inputs; it
146 differs only in the type of the variable, or some other property that doesn't
147 affect the value of the variable itself.
151 The instruction may affect the type and/or value of its base operand,
152 operating on object properties.
156 The instruction may affect the type and/or value of its base operand,
157 operating on array elements.
163 1. Checks and Asserts
165 Note: Instructions that check boxed types only check that the operand is boxed,
166 and they ignore the type of the value inside the box (the inner type). The
167 inner type is normally checked when the value within the box is about to be
168 loaded, using a separate CheckRefInner instruction.
170 | CheckType<T>, DRefineS(0), S(Gen,Cls), B|P
172 Check that the type of the src S0 is T, and if so copy it to D, and
173 fallthrough. If S0 cannot be proven to be T, branch to block B. Note that
174 this means S0 still /may/ be a subtype of T in block B in some circumstances.
176 Specifically, subtypes of Type::Static may not be checked precisely,
177 depending on the type of the source. This means the instruction may take the
178 branch in some circumstances even when S0 is a subtype of T, if T has a
179 non-empty intersection with Type::Static.
181 Also note that many types are not supported as the typeParam right now.
183 | CheckNullptr, ND, S(StaticStr,Nullptr), B
185 If S0 is not a null pointer, branch to block B. This is used to check the
186 return value of a native helper that returns a potentially null StringData*.
188 | AssertType, DRefineS(0), S(Gen,Cls,Ctx,FuncMM), P
190 Assert that the type of S0 is T, copying it to D.
192 | CheckTypeMem<T>, ND, S(MemToGen), B
194 If the value pointed to by S0 is not type T, branch to the block B.
196 | CheckVArray, DArrPacked, S(Arr), B|P
198 Check that S0 is a varray, and if so copy it to D, and fallthrough. If S0 is
199 not a varray, branch to block B.
201 | CheckDArray, DArrMixed, S(Arr), B|P
203 Check that S0 is a darray, and if so copy it to D, and fallthrough. If S0 is
204 not a darray, branch to block B.
206 | HintLocInner<T,localId>, ND, S(FramePtr), NF
208 Hint that the inner type of a BoxedCell in localId is likely type T, where T
209 is a subtype of BoxedCell. The type must be guarded on before it is known to
210 be true (via CheckRefInner).
212 | HintStkInner<T,offset>, ND, S(StkPtr), NF
214 Hint that the inner type of the BoxedInitCell on the stack pointed to by S0
215 at offset (in cells) is T. The type must be guarded on before it is known to
216 be true (via CheckRefInner).
218 | HintMBaseInner<T>, ND, NA, NF
220 Hint that the inner type of the BoxedInitCell pointed to by the member base
221 register is T. The type must be guarded on before it is known to be true
224 | CheckLoc<T,localId>, ND, S(FramePtr), B
226 Check that type of the given localId on the frame S0 is T; if not, branch to
229 | CheckStk<T,offset>, ND, S(StkPtr), B
231 Check that the type of the cell on the stack pointed to by S0 at offset (in
232 cells) is T; if not, branch to block B.
234 | CheckMBase<T>, ND, S(LvalToGen), B
236 Check that the value pointed to by the member base register S0 has type T; if
237 not, branch to block B. This is functionally the same as CheckTypeMem.
239 | AssertLoc<T,localId>, ND, S(FramePtr), NF
241 Asserts that type of the supplied local on the frame S0 is T. This is used
242 for local type information, and is similar to CheckLoc except it doesn't
243 imply a runtime check (the assertion must've already been proven to be true)
244 and cannot cause control flow.
246 | AssertStk<T,offset>, ND, S(StkPtr), NF
248 Assert that stack element at `offset' (in cells) from S0 has type T. This is
249 similar to a CheckStk except that it does not imply a runtime check and
250 cannot cause control flow.
252 | AssertMBase<T>, ND, NA, NF
254 Assert that the value pointed to by the member base register has type T.
255 This is similar to a CheckMBase except that it does not imply a runtime check
256 and cannot cause control flow.
258 The following instructions deal with parameter coercion (the standard type
259 conversion for arguments to HNI functions). If parameter coercion fails these
260 functions will throw a TVCoercion exception. They may throw other types of
261 exceptions depending on how coercion is implemented.
263 | CoerceStk<T,offset,fn,argNum>, ND, S(StkPtr), NF
265 Converts the stack slot at offset (in cells) to type T, with the semantics
266 needed for calling a builtin function. May throw a TVCoercionException in the
267 case of failed parameter coercion. The callee is f, and the position of the
268 argument being coerced is argNum.
270 | CoerceMem<T,fn,argNum>, ND, S(PtrToGen), NF
272 Coerces the TypedValue at S0 to type T, with the semantics
273 needed for calling a builtin function. May throw a TVCoercionException in the
274 case of failed parameter coercion. The callee is fn, and the position of the
275 argument being coerced is argNum.
277 | CoerceCellToBool<fn,argNum>, D(Bool), S(Cell), NF
279 | CoerceCellToInt<fn,argNum>, D(Int), S(Cell), NF
281 | CoerceStrToInt<fn,argNum>, D(Int), S(Str), NF
283 | CoerceCellToDbl<fn,argNum>, D(Dbl), S(Cell), NF
285 | CoerceStrToDbl<fn,argNum>, D(Dbl), S(Str), NF
287 These instructions convert either a Cell or a Str to a primitive type (Bool,
288 Int, Dbl) and return the resulting value. They may throw an exception upon
289 failed type coercion. They are encoded along with callee Func, fn, and the
290 integer position of the argument, argNum, being coerced.
292 | CheckInit, ND, S(Gen), B
294 If S0's type is Uninit, branch to block B.
296 | CheckInitMem, ND, S(MemToGen), B
298 If the value pointed to by S0 has type Uninit, branch to block B.
300 | CheckCold<TransID>, ND, NA, B
302 Check if the counter associated with translation TransID is cold (i.e. within
303 a fixed threshold). If it's not (i.e. such translation has reached the
304 "hotness threshold"), then branch to block B.
306 | CheckRefs<firstBit,mask,vals>, ND, S(Func) S(Int), B
308 Perform reffiness guard checks. Operands:
310 S0 - function pointer for the frame
311 S1 - num params expected in the func
312 firstBit - first bit to check, must be a multiple of 64
313 mask - mask to check (RefDeps::Record::m_mask entries)
314 vals - values to check (RefDeps::Record::m_vals entries)
316 If any of the checks fail, branch to block B.
318 | EndGuards, ND, NA, NF
320 A no-op at runtime, this instruction serves to mark the end of the initial
321 sequence of guards in a trace.
323 | CheckNonNull, DSubtract(0, Nullptr), S(Nullptr,Func,PtrToGen,TCA,Cls,Ctx,Str), B
325 If the value in S0 is Nullptr, branch to block B. If S0 cannot be Nullptr, or
326 always is Nullptr, this check may be optimized away.
328 | AssertNonNull, DSubtract(0, Nullptr), S(Nullptr,StaticStr,Func,ArrLike), P
330 Returns S0, with Nullptr removed from its type. This instruction currently
331 supports a very limited range of types but can be expanded if needed.
333 | AssertARFunc<spOff>, ND, S(StkPtr) S(Func), NF
335 Asserts that the ActRec at offset spOff from S0 contains function S1.
337 | CheckFuncMMNonMagic, D(Func), S(FuncMM), B|P
339 Check that S0 is not a func pointer with magic bit set and if so copy it
340 to D, and fallthrough. If S0 has a magic bit set, branch to block B.
342 | CheckSmashableClass, ND, S(Smashable) S(Cls), B
344 If the lower 32 bits of S0 does not match class pointer S1, branch to block B.
348 | AddInt, D(Int), S(Int) S(Int), NF
350 | SubInt, D(Int), S(Int) S(Int), NF
352 | MulInt, D(Int), S(Int) S(Int), NF
354 | AddIntO, D(Int), S(Int) S(Int), B
356 | SubIntO, D(Int), S(Int) S(Int), B
358 | MulIntO, D(Int), S(Int) S(Int), B
360 | AddDbl, D(Dbl), S(Dbl) S(Dbl), NF
362 | SubDbl, D(Dbl), S(Dbl) S(Dbl), NF
364 | MulDbl, D(Dbl), S(Dbl) S(Dbl), NF
366 | DivDbl, D(Dbl), S(Dbl) S(Dbl), NF
368 | DivInt, D(Int), S(Int) S(Int), NF
370 | Floor, D(Dbl), S(Dbl), NF
372 | Ceil, D(Dbl), S(Dbl), NF
374 | AbsDbl, D(Dbl), S(Dbl), NF
376 | Sqrt, D(Dbl), S(Dbl), NF
378 | AndInt, D(Int), S(Int) S(Int), NF
380 | OrInt, D(Int), S(Int) S(Int), NF
382 | XorInt, D(Int), S(Int) S(Int), NF
384 | Shl, D(Int), S(Int) S(Int), NF
386 | Shr, D(Int), S(Int) S(Int), NF
388 | Lshr, D(Int), S(Int) S(Int), NF
390 Double arithmetic, integer arithmetic, and integer bitwise operations.
391 Performs the operation described by the opcode name on S0 and S1, and puts
394 Undefined behavior occurs if Mod is given a divisor of zero, or if the
395 divisor is -1 and the dividend is the minimum representable integer.
397 AbsDbl computes the absolute value of a double-precision value.
399 DivDbl conforms to IEEE 754. In particular, division by zero returns +/- INF
400 or NAN depending on the dividend; and should the result of a division be zero
401 the sign will follow the normal sign rules for division.
403 DivInt will perform integer division of S1 by S0. S0 should not be zero and
406 Note that Shr is an arithmetic right shift: The MSB is sign-extended.
408 Lshr is logical right shift.
410 Floor and Ceil will return an integral value not greater, or not less
411 than their input respectively. Their use requires SSE 4.1, availability
412 should be checked before they are emitted.
414 AddIntO, SubIntO, MulIntO perform integer arithmetic on S0 and S1, but will
415 branch to block B on integer overflow.
417 | XorBool, D(Bool), S(Bool) S(Bool), NF
419 Logical XOR of the two sources. (Note that && and || do not have
420 corresponding opcodes because they're handled at the bytecode level, to
421 implement short-circuiting.)
423 | Mod, D(Int), S(Int) S(Int), NF
425 Compute S0 mod S1. If S1 is -1 or 0 the results are undefined.
430 To array conversions:
432 | ConvBoolToArr, D(Arr), S(Bool), PRc
434 | ConvDblToArr, D(Arr), S(Dbl), PRc
436 | ConvIntToArr, D(Arr), S(Int), PRc
438 | ConvObjToArr, D(Arr), S(Obj), PRc|CRc
440 | ConvStrToArr, D(Arr), S(Str), PRc|CRc
442 | ConvVecToArr, D(Arr), S(Vec), PRc|CRc
444 | ConvDictToArr, D(Arr), S(Dict), PRc|CRc
446 | ConvShapeToArr, D(Arr), S(Shape), PRc|CRc
448 | ConvKeysetToArr, D(Arr), S(Keyset), PRc|CRc
450 | ConvCellToArr, D(Arr), S(Cell), PRc|CRc
453 | ConvArrToNonDVArr, D(Arr), S(Arr), PRc|CRc
458 | ConvArrToVec, D(Vec), S(Arr), PRc|CRc
460 | ConvDictToVec, D(Vec), S(Dict), PRc|CRc
462 | ConvShapeToVec, D(Vec), S(Shape), PRc|CRc
464 | ConvKeysetToVec, D(Vec), S(Keyset), PRc|CRc
466 | ConvObjToVec, D(Vec), S(Obj), PRc|CRc
471 | ConvArrToDict, D(Dict), S(Arr), PRc|CRc
473 | ConvShapeToDict, D(Dict), S(Shape), PRc|CRc
475 | ConvVecToDict, D(Dict), S(Vec), PRc|CRc
477 | ConvKeysetToDict, D(Dict), S(Keyset), PRc|CRc
479 | ConvObjToDict, D(Dict), S(Obj), PRc|CRc
482 To keyset conversions:
484 | ConvArrToKeyset, D(Keyset), S(Arr), PRc|CRc
486 | ConvVecToKeyset, D(Keyset), S(Vec), PRc|CRc
488 | ConvDictToKeyset, D(Keyset), S(Dict), PRc|CRc
490 | ConvShapeToKeyset, D(Keyset), S(Shape), PRc|CRc
492 | ConvObjToKeyset, D(Keyset), S(Obj), PRc|CRc
495 To varray conversions:
497 | ConvArrToVArr, DArrPacked, S(Arr), PRc|CRc
499 | ConvVecToVArr, DArrPacked, S(Vec), PRc|CRc
501 | ConvDictToVArr, DArrPacked, S(Dict), PRc|CRc
503 | ConvShapeToVArr, DArrPacked, S(Shape), PRc|CRc
505 | ConvKeysetToVArr, DArrPacked, S(Keyset), PRc|CRc
507 | ConvObjToVArr, DArrPacked, S(Obj), PRc|CRc
510 To darray conversion:
512 | ConvArrToDArr, DArrMixed, S(Arr), PRc|CRc
514 | ConvVecToDArr, DArrMixed, S(Vec), PRc|CRc
516 | ConvDictToDArr, DArrMixed, S(Dict), PRc|CRc
518 | ConvShapeToDArr, DArrMixed, S(Shape), PRc|CRc
520 | ConvKeysetToDArr, DArrMixed, S(Keyset), PRc|CRc
522 | ConvObjToDArr, DArrMixed, S(Obj), PRc|CRc
527 | ConvArrToBool, D(Bool), S(Arr), NF
529 | ConvDblToBool, D(Bool), S(Dbl), NF
531 | ConvIntToBool, D(Bool), S(Int), NF
533 | ConvStrToBool, D(Bool), S(Str), NF
535 | ConvObjToBool, D(Bool), S(Obj), NF
537 | ConvCellToBool, D(Bool), S(Cell), NF
540 To double conversions:
542 | ConvArrToDbl, D(Dbl), S(Arr), NF
544 | ConvBoolToDbl, D(Dbl), S(Bool), NF
546 | ConvIntToDbl, D(Dbl), S(Int), NF
548 | ConvObjToDbl, D(Dbl), S(Obj), NF
550 | ConvStrToDbl, D(Dbl), S(Str), NF
552 | ConvResToDbl, D(Dbl), S(Res), NF
554 | ConvCellToDbl, D(Dbl), S(Cell), NF
559 | ConvBoolToInt, D(Int), S(Bool), NF
561 | ConvDblToInt, D(Int), S(Dbl), NF
563 | ConvObjToInt, D(Int), S(Obj), NF
565 | ConvStrToInt, D(Int), S(Str), NF
567 | ConvResToInt, D(Int), S(Res), NF
569 | ConvCellToInt, D(Int), S(Cell), NF
572 To object conversions:
574 | ConvCellToObj, D(Obj), S(Cell), CRc|PRc
577 To string conversions:
579 | ConvDblToStr, D(Str), S(Dbl), PRc
581 | ConvIntToStr, D(Str), S(Int), PRc
583 | ConvObjToStr, D(Str), S(Obj), PRc
585 | ConvResToStr, D(Str), S(Res), PRc
587 | ConvCellToStr, D(Str), S(Cell), PRc
590 All the above opcodes convert S0 from its current type to the destination
591 type, according to the PHP semantics of such a conversion.
593 | DblAsBits, D(Int), S(Dbl), NF
595 Reinterpret a double as an integer with the same bit pattern.
597 | ConvClsToCctx, D(Cctx), S(Cls), NF
599 Convert a class to a class context (i.e. the class with a 1 or'd into the low
602 | OrdStr, D(Int), S(Str), NF
604 Convert the first byte in a string to an unsigned integer.
605 Intended as an optimization for ord($str)
607 | OrdStrIdx, D(Int), S(Str) S(Int), NF
609 Convert the character at position S1 in base string S0 to an unsigned
610 integer. Raises a notice if the position is out of bounds.
611 Intended as an optimization for ord($str[$idx]).
613 | ChrInt, D(StaticStr), S(Int), NF
615 Convert the integer S0 to a the one character string with ascii code
618 | StrictlyIntegerConv, D(Str|Int), S(Str), PRc
620 If S0 is a string representing an integer value (same criteria as array key
621 conversion), return that value as an integer. Otherwise return S0.
623 | ConvPtrToLval, DLvalOfPtr, S(PtrToGen), NF
625 Convert S0 to an equivalent lval.
628 4. Boolean predicates
630 | GtInt, D(Bool), S(Int) S(Int), NF
632 | GteInt, D(Bool), S(Int) S(Int), NF
634 | LtInt, D(Bool), S(Int) S(Int), NF
636 | LteInt, D(Bool), S(Int) S(Int), NF
638 | EqInt, D(Bool), S(Int) S(Int), NF
640 | NeqInt, D(Bool), S(Int) S(Int), NF
642 | CmpInt, D(Int), S(Int) S(Int), NF
644 Perform 64-bit integer comparisons.
646 | GtDbl, D(Bool), S(Dbl) S(Dbl), NF
648 | GteDbl, D(Bool), S(Dbl) S(Dbl), NF
650 | LtDbl, D(Bool), S(Dbl) S(Dbl), NF
652 | LteDbl, D(Bool), S(Dbl) S(Dbl), NF
654 | EqDbl, D(Bool), S(Dbl) S(Dbl), NF
656 | NeqDbl, D(Bool), S(Dbl) S(Dbl), NF
658 | CmpDbl, D(Int), S(Dbl) S(Dbl), NF
660 Perform comparisons of doubles. Comparisons that are unordered according to
661 IEEE 754 (such as when at least one operand is NaN) result in false.
663 | GtStr, D(Bool), S(Str) S(Str), NF
665 | GteStr, D(Bool), S(Str) S(Str), NF
667 | LtStr, D(Bool), S(Str) S(Str), NF
669 | LteStr, D(Bool), S(Str) S(Str), NF
671 | EqStr, D(Bool), S(Str) S(Str), NF
673 | NeqStr, D(Bool), S(Str) S(Str), NF
675 | SameStr, D(Bool), S(Str) S(Str), NF
677 | NSameStr, D(Bool), S(Str) S(Str), NF
679 | CmpStr, D(Int), S(Str) S(Str), NF
681 Performs comparison of strings using PHP semantics.
683 | GtStrInt, D(Bool), S(Str) S(Int), NF
685 | GteStrInt, D(Bool), S(Str) S(Int), NF
687 | LtStrInt, D(Bool), S(Str) S(Int), NF
689 | LteStrInt, D(Bool), S(Str) S(Int), NF
691 | EqStrInt, D(Bool), S(Str) S(Int), NF
693 | NeqStrInt, D(Bool), S(Str) S(Int), NF
695 | CmpStrInt, D(Int), S(Str) S(Int), NF
697 Performs comparison of strings with integers using PHP semantics.
699 | GtBool, D(Bool), S(Bool) S(Bool), NF
701 | GteBool, D(Bool), S(Bool) S(Bool), NF
703 | LtBool, D(Bool), S(Bool) S(Bool), NF
705 | LteBool, D(Bool), S(Bool) S(Bool), NF
707 | EqBool, D(Bool), S(Bool) S(Bool), NF
709 | NeqBool, D(Bool), S(Bool) S(Bool), NF
711 | CmpBool, D(Int), S(Bool) S(Bool), NF
713 Performs comparison of booleans.
715 | GtObj, D(Bool), S(Obj) S(Obj), NF
717 | GteObj, D(Bool), S(Obj) S(Obj), NF
719 | LtObj, D(Bool), S(Obj) S(Obj), NF
721 | LteObj, D(Bool), S(Obj) S(Obj), NF
723 | EqObj, D(Bool), S(Obj) S(Obj), NF
725 | NeqObj, D(Bool), S(Obj) S(Obj), NF
727 | SameObj, D(Bool), S(Obj) S(Obj), NF
729 | NSameObj, D(Bool), S(Obj) S(Obj), NF
731 | CmpObj, D(Int), S(Obj) S(Obj), NF
733 Perform comparison of objects using PHP semantics. All versions except for
734 SameObj and NSameObj may re-enter the VM and therefore may throw
735 exceptions. SameObj and NSameObj never re-enter or throw.
737 | GtArr, D(Bool), S(Arr) S(Arr), NF
739 | GteArr, D(Bool), S(Arr) S(Arr), NF
741 | LtArr, D(Bool), S(Arr) S(Arr), NF
743 | LteArr, D(Bool), S(Arr) S(Arr), NF
745 | EqArr, D(Bool), S(Arr) S(Arr), NF
747 | NeqArr, D(Bool), S(Arr) S(Arr), NF
749 | SameArr, D(Bool), S(Arr) S(Arr), NF
751 | NSameArr, D(Bool), S(Arr) S(Arr), NF
753 | CmpArr, D(Int), S(Arr) S(Arr), NF
755 Perform comparison of arrays using PHP semantics. All versions except for
756 SameArr and NSameArr may re-enter the VM and therefore may throw
757 exceptions. SameArr and NSameArr never re-enter or throw.
759 | GtShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
761 | GteShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
763 | LtShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
765 | LteShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
767 | EqShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
769 | NeqShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
771 | SameShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
773 | NSameShape, D(Bool), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
775 | CmpShape, D(Int), S(Shape,Arr,Dict) S(Shape,Arr,Dict), NF
777 Perform comparison of Shapes using PHP semantics. All versions except for
778 SameShape and NSameShape may re-enter the VM and therefore may throw
779 exceptions. SameShape and NSameShape never re-enter or throw.
781 | GtVec, D(Bool), S(Vec) S(Vec), NF
783 | GteVec, D(Bool), S(Vec) S(Vec), NF
785 | LtVec, D(Bool), S(Vec) S(Vec), NF
787 | LteVec, D(Bool), S(Vec) S(Vec), NF
789 | EqVec, D(Bool), S(Vec) S(Vec), NF
791 | NeqVec, D(Bool), S(Vec) S(Vec), NF
793 | SameVec, D(Bool), S(Vec) S(Vec), NF
795 | NSameVec, D(Bool), S(Vec) S(Vec), NF
797 | CmpVec, D(Int), S(Vec) S(Vec), NF
799 Perform comparison of vecs. All versions except for SameVec and NSameVec may
800 re-enter the VM and therefore may throw exceptions. SameVec and NSameVec
801 never re-enter or throw.
803 | EqDict, D(Bool), S(Dict) S(Dict), NF
805 | NeqDict, D(Bool), S(Dict) S(Dict), NF
807 | SameDict, D(Bool), S(Dict) S(Dict), NF
809 | NSameDict, D(Bool), S(Dict) S(Dict), NF
811 Perform comparison of dicts. EqDict and NeqDict may re-enter the VM and
812 therefore may throw exceptions. SameDict and NSameDict never re-enter or
813 throw. Relational comparisons for dicts are not supported.
815 | EqKeyset, D(Bool), S(Keyset) S(Keyset), NF
817 | NeqKeyset, D(Bool), S(Keyset) S(Keyset), NF
819 | SameKeyset, D(Bool), S(Keyset) S(Keyset), NF
821 | NSameKeyset, D(Bool), S(Keyset) S(Keyset), NF
823 Perform comparison of keysets. As keysets can only contain ints and strings,
824 comparisons never re-enter or throw. Relational comparisons for keysets are
827 | GtRes, D(Bool), S(Res) S(Res), NF
829 | GteRes, D(Bool), S(Res) S(Res), NF
831 | LtRes, D(Bool), S(Res) S(Res), NF
833 | LteRes, D(Bool), S(Res) S(Res), NF
835 | EqRes, D(Bool), S(Res) S(Res), NF
837 | NeqRes, D(Bool), S(Res) S(Res), NF
839 | CmpRes, D(Int), S(Res) S(Res), NF
841 Perform comparison of resources using PHP semantics. Resource comparisons
842 never re-enter or throw.
844 | EqCls, D(Bool), S(Cls) S(Cls), NF
846 Checks if two Class values are equal.
848 | EqFunc, D(Bool), S(Func) S(Func), NF
850 Checks if two Func values are equal.
852 | EqStrPtr, D(Bool), S(Str) S(Str), NF
854 Checks if two string values represent the same underlying string. That is,
855 that they point at the same underlying storage.
857 | EqArrayDataPtr, D(Bool), S(ArrLike) S(ArrLike), NF
859 Checks if the two arguments represent the same underlying ArrayData. That is,
860 that they point at the same underlying storage.
862 | ProfileInstanceCheck, ND, C(StaticStr), NF
864 Profile that S0 has been used as the RHS of an instance check.
866 | InstanceOf, D(Bool), S(Cls) S(Cls|Nullptr), NF
868 Sets D based on whether S0 is a descendant of the class, interface, or trait
869 in S1. (Note that this is always false for a trait). S1 may be null at
870 runtime if the class is not defined.
872 | InstanceOfIface, D(Bool), S(Cls) CStr, NF
874 Fast path for interface checks. Sets D based on whether S0 implements S1, but
875 S1 must be a unique interface. This should only be used in repo-authoritative
878 | InstanceOfIfaceVtable<iface>, D(Bool), S(Cls), NF
880 Faster path for interface checks. Sets D based on whether S0 implements
881 iface, which must be a unique interface with an assigned vtable slot.
883 | ExtendsClass<cls,strictLikely>, D(Bool), S(Cls), NF
885 A fast-path for instanceof checks. Sets D based on whether S0 is a descendant
886 of cls, where cls must be a unique class that is not an interface or a trait.
888 If strictLikely is true, optimize for the case where S0 is not equal to S1.
890 | InstanceOfBitmask, D(Bool), S(Cls) CStr, NF
892 | NInstanceOfBitmask, D(Bool), S(Cls) CStr, NF
894 A fast-path for instanceof checks. Sets D based on whether S0 is a descendant
895 of the class named by S1, where S1 must have a bit allocated for it in the
896 fast instance check bitvector (see class.h).
898 | InterfaceSupportsArr, D(Bool), S(Str), NF
900 | InterfaceSupportsVec, D(Bool), S(Str), NF
902 | InterfaceSupportsDict, D(Bool), S(Str), NF
904 | InterfaceSupportsKeyset, D(Bool), S(Str), NF
906 | InterfaceSupportsStr, D(Bool), S(Str), NF
908 | InterfaceSupportsInt, D(Bool), S(Str), NF
910 | InterfaceSupportsDbl, D(Bool), S(Str), NF
912 Returns whether t instanceof S0 returns true when t is of the given type.
914 | ResolveTypeStruct<class,suppress,offset,size,isOrAsOp>,
915 | DDArr, S(StkPtr) S(Cls|Nullptr), NF
917 Applies class/alias resolution on the type structure that is at the stack
918 offset given by S0 and offset. If size > 1, combine the type structures on
919 the stack into the first one's denoted holes. Returns a copy.
920 S1 is the calling class, used to resolve the this typehint.
921 If isOrAsOp is set, raises an error if S0 contains traits, function types or
923 If there is an error during type structure resolution, this instruction raises
924 an error. If suppress is set, this error is demoted to a warning.
926 | IsTypeStruct, D(Bool), SDArr S(Cell), NF
928 Returns whether S1 matches the type structure of a defined type in S0 and S1
929 is a subtype of S0. The input type structure (S0) must be resolved.
931 | AsTypeStruct, ND, SDArr S(Cell), NF
933 Throws an exception if S1 does not match the type structure of a defined
934 type in S0 or S1 is not a subtype of S0. The input type structure (S0) must
937 | HasToString, D(Bool), S(Obj), NF
939 Returns whether the object S0 has a toString method.
941 | IsType<T>, D(Bool), S(Gen), NF
943 Sets D to true iff S0 holds a value that is of type T. T must not be a
946 | IsNType<T>, D(Bool), S(Gen), NF
948 Sets D to true iff S0 holds a value that is not of type T. T must not be a
951 | IsTypeMem<T>, D(Bool), S(PtrToGen), NF
953 Sets D to true iff the value referenced by S0 is of type T. T must not be a
956 The value in S0 must not be a pointer into the evaluation stack or frame
959 | IsNTypeMem<T>, D(Bool), S(PtrToGen), NF
961 Sets D to true iff the value referenced by S0 is not of type T. T must not be
964 | IsWaitHandle, D(Bool), S(Obj), NF
966 Sets D to true iff S0 is a subclass of WaitHandle.
968 | IsCol, D(Bool), S(Obj), NF
970 Sets D to true iff S0 is a collection.
972 | IsDVArray, D(Bool), S(Arr), NF
974 Sets D to true iff S0 is a darray or varray.
978 | JmpZero, ND, S(Int,Bool), B
980 | JmpNZero, ND, S(Int,Bool), B
982 Conditionally jump to based on S0.
984 | JmpSSwitchDest, ND, S(TCA) S(StkPtr) S(FramePtr), T
986 Jump to the target of a sswitch statement, leaving the region, where the
989 | JmpSwitchDest, ND, S(Int) S(StkPtr) S(FramePtr), T
991 Jump to the target of a switch statement, leaving the region, using table
992 metadata <JmpSwitchData> and index S0, which must be a valid index in the
995 | ProfileSwitchDest<handle,nCases>, ND, S(Int), NF
997 Profile a switch statement target.
999 | CheckSurpriseFlags, ND, S(FramePtr,StkPtr), B
1001 Tests the implementation-specific surprise flags. If they're true, branches
1002 to block B. This is done by comparing an evaluation stack pointer to the RDS
1003 stackLimitAndSurprise word. Note that in a resumed, the frame pointer is not
1004 pointing into the eval stack, so S0 should be a StkPtr in that case.
1006 | HandleRequestSurprise, ND, NA, NF
1008 Generate exceptions based on surprise flags on a per request basis.
1009 Make sure CheckSurpriseFlags is true before calling HandleRequestSurprise.
1011 | ReturnHook, ND, S(FramePtr) S(Gen), NF
1013 Surprise flag hook for function returns.
1015 | SuspendHookAwaitEF, ND, S(FramePtr) S(FramePtr) S(Obj), NF
1017 Surprise flag hook for suspending eagerly executing async functions. The S0
1018 frame was already teleported into S1. Decrefs S2 if it throws an exception.
1020 | SuspendHookAwaitEG, ND, S(FramePtr) S(Obj), NF
1022 Surprise flag hook for suspending eagerly executing async generators. The S0
1023 frame has an associated AG, which is already linked to the newly constructed
1024 AGWH in the blocked state. Decrefs S1 if it throws an exception.
1026 | SuspendHookAwaitR, ND, S(FramePtr) S(Obj), NF
1028 Surprise flag hook for suspending async functions and async generators resumed
1029 at Await. The S0 frame has an associated AFWH/AGWH still in the running state,
1030 S1 points to the child WH we are going to block on.
1032 | SuspendHookCreateCont, ND, S(FramePtr) S(FramePtr) S(Obj), NF
1034 Surprise flag hook for suspending generators and async generators during their
1035 invocation. The S0 frame was already teleported into S1. Decrefs S2 if it
1036 throws an exception.
1038 | SuspendHookYield, ND, S(FramePtr), NF
1040 Surprise flag hook for suspending generators and async generators at Yield.
1042 | Unreachable<AssertReason>, ND, NA, T
1044 Indicates an unreachable code path. Any instructions that are post-dominated
1045 by an Unreachable may be treated as unreachable by the optimizer, and the
1046 behavior of a program that attempts to execute an Unreachable is undefined.
1048 | EndBlock<AssertReason>, ND, NA, T
1050 Halt execution, without implying anything about the reachability of
1051 instructions preceding this. Intended for use in internal tests or other code
1052 not meant to be executed.
1054 | Jmp, ND, SVar(Top), B|T
1056 Unconditional jump to block B. In the second form, the target block must
1057 start with a DefLabel with the same number of destinations as Jmp's number of
1058 sources. Jmp parallel-copies its sources to the DefLabel destinations.
1060 | DefLabel, DMulti, NA, NF
1062 DefLabel defines variables received from a previous Jmp. A DefLabel with zero
1063 destinations is a no-op, and the predecessor blocks may not necessarily end
1064 in Jmp. A DefLabel with one or more destinations may only be reached by a Jmp
1065 instruction with the same number of sources. Ordinary branch instructions may
1066 not pass values to a DefLabel.
1068 | Select, DUnion(1,2), S(Bool,Int) S(Top) S(Top), NF
1070 If S0 is true/non-zero, return S1, otherwise return S2.
1073 6. Reference manipulation
1075 | Box, D(BoxedInitCell), S(Cell), CRc|PRc
1077 Box S0 and put the resulting BoxedInitCell in D. If S0 is Uninit, then
1078 InitNull will be boxed instead.
1080 | UnboxPtr, DUnboxPtr, S(MemToGen), NF
1082 If S0 points to a cell that is KindOfRef, dereference the pointer in the
1083 TypedValue and return a pointer to the inner-cell in D.
1085 | BoxPtr, DBoxPtr, S(MemToGen), NF
1087 Boxes the TypeValue that S0 points to if it is not boxed. The result D points
1088 to the same TypedValue as S0 but has a more refined type.
1090 S0 may not already point into a RefData (due to VM invariants), although the
1091 IR type system does not enforce it.
1096 | LdStk<T,offset>, DParamMayRelax(Gen), S(StkPtr), NF
1098 Loads from S0 at offset (in cells), and puts the value in D as type T.
1100 | LdLoc<T,localId>, DParamMayRelax(Gen), S(FramePtr), NF
1102 Loads local slot localId from the frame S0 and puts the value in D as type T.
1104 | LdLocPseudoMain<T,localId>, DParam(Gen), S(FramePtr), B
1106 Loads local number localId from frame S0 and puts the value in D if the
1107 local's type is a subtype of T. If the local's type is not a subtype of T,
1108 then the load does not happen, and this instruction branches to B. This
1109 instruction is used for loading locals in pseudo-mains, where they can alias
1112 | LdClsRefCls<T,slot>, DParamMayRelax(Cls), S(FramePtr), NF
1114 Loads class-ref's cls from slot `slot` in frame S0 and puts the value in D
1115 as type T. T must be a sub-type of TCls.
1117 | LdClsRefTS<slot>, DVArrOrNull, S(FramePtr), NF
1119 Loads class-ref's reified generics from slot `slot` in frame S0 and puts the
1122 | LdStkAddr<T,offset>, D(PtrToStkGen), S(StkPtr), NF
1124 Loads the address of the stack slot given by the pointer in S0 at the offset
1125 (in cells). T must be a subtype of PtrToStkGen.
1127 | LdLocAddr<localId>, D(PtrToFrameGen), S(FramePtr), NF
1129 Loads the address of the local slot localId from the frame S0 into D.
1131 | LdRDSAddr<T,RDSHandle>, DParam(PtrToGen), NA, NF
1133 Load the address of a Gen that lives at the specified RDS handle. The type
1134 param must be a subtype of PtrToGen.
1136 | LdInitRDSAddr<T,RDSHandle>, DParam(PtrToInitGen), NA, B
1138 Load the address of a Gen that lives at the specified RDS handle. Branch if
1139 the value at that address is Uninit. The type param must be a subtype of
1142 | LdVectorBase, D(PtrToMembCell), S(Obj), NF
1144 | LdPairBase, D(PtrToMembCell), S(Obj), NF
1146 Loads the base pointer to an array of Cells from the given collection
1149 | LdMem<T>, DParam(Gen), S(MemToGen), NF
1151 Loads from S0 and puts the value in D.
1153 | LdContField<T>, DParam(Gen), S(Obj) C(Int), NF
1155 Loads a property from the object referenced by S0 at the offset given by S1
1156 and puts the value in D. S0 must be a Generator.
1158 | LdElem, D(Cell), S(PtrToCell) S(Int), NF
1160 Loads the element at index S1 from the base pointer in S0. The index in S1 is
1161 the number of bytes from the base in S0.
1163 | LdColVec, D(Vec), S(Obj), NF
1165 Load the vec array backing a collection instance in S0, which must be a
1166 Vector or ImmVector, and that specific object type must be known at compile
1169 | LdColDict, D(Dict), S(Obj), NF
1171 Load the dict array backing a collection instance in S0, which must be a
1172 Map, Set, ImmMap, or ImmSet, and that specific object type must be known at
1175 | CheckRefInner<T>, ND, S(BoxedCell), B
1177 TODO(#2939547): this should take BoxedInitCell
1179 Check that the inner type of the boxed cell in S0 is T, and if not take the
1182 | LdRef<T>, DParam(Cell), S(BoxedCell), NF
1184 TODO(#2939547): this should take BoxedInitCell
1186 Loads the value held in the box referenced by S0 and puts the value in D. The
1187 inner type of S0 must be a subtype of T (usually ensured with a previous
1190 | LdCtx, DCtx, S(FramePtr), NF
1192 Loads into D the value of the m_this/m_cls field out of the frame pointer S0,
1193 which must be a frame for the function in the LdCtx's marker. The result
1194 could be either an object representing the this pointer or a class context.
1196 | LdCctx, DCtx, S(FramePtr), NF
1198 Loads into D the value of the m_cls field out of the frame pointer S0. The
1199 compiler should generate this only if it can prove that the frame does not
1200 contain a nullptr or $this pointer.
1202 | LdClosure<T>, DParam(Ctx), S(FramePtr), NF
1204 Loads into D the value of the m_this/m_cls field out of the frame pointer S0.
1205 The compiler should generate this only if it can prove that the frame context
1206 is a closure object of type T. Unlike LdCtx and LdCctx, there are no special
1207 rules about the relative positions of LdClosure and InitCtx instructions.
1209 | CheckCtxThis, ND, S(Ctx), B
1211 Check that the context (m_this or m_cls) in S0 is a non-null $this
1212 pointer. If not, branch to B.
1214 | LdClsCtx, DCtxCls, S(Ctx), NF
1216 Loads into D the class representing the context in S0, which can be either
1217 the this pointer or the context class.
1219 | LdClsCctx, DCtxCls, S(Cctx), NF
1221 Loads into D the class representing the context in S0, which is a context
1224 | LdClsCtor, D(Func), S(Cls) S(FramePtr), NF
1226 Loads into D the constructor of class S0. If the constructor cannot be called
1227 from the context in S1, raise an error.
1229 | LdFuncMFunc, D(Func), S(FuncM), NF
1231 Loads into D the func pointer for the func pointer with magic bit set in S0.
1233 | LdSmashable, D(Smashable), NA, NF
1235 Loads a smashable value. The initial value is set to (1 << addr) + 1, where
1236 addr is a pointer pointing to the value in TC. The lowest bit is set for
1237 convenience of checking whether the value was already smashed.
1239 | LdSmashableFunc, D(Func), S(Smashable), NF
1241 Loads into D the func pointer stored in the higher 32 bits of S0.
1243 | LdRecCached, D(RecType), CStr, NF
1245 Loads the record named S0 via the RDS. Invokes autoload and may raise an error
1246 if the record is not defined.
1248 | DefCls, D(Cls), S(Int), NF
1250 Define the class corresponding to PreClass S0 in the current unit.
1252 | DefConst<T>, DParam(Top), NA, NF
1254 Define a constant value of type T. D is presumed to be globally available and
1255 the DefConst instruction will not actually appear in the IR instruction
1258 | Conjure<T>, DParam(Top), NA, NF
1260 Define a value of type T. This instruction aborts at runtime; it is meant to
1261 be used in tests or code that is known to be unreachable.
1263 | ConjureUse, ND, S(Gen), NF
1265 Define a "use" of S0 effectively keeping the value alive. As with Conjure it
1266 should not appear in reachable code.
1268 | LdCls, D(Cls), S(Str) C(Cls), NF
1270 Loads the class named S0 in the context of the class S1. Invokes autoload and
1271 may raise an error if the class is not defined. The explicit context
1272 parameter allows the compiler to simplify this instruction to a DefConst in
1273 some cases. If S0 is constant, this instruction may be simplified to a
1276 | LdClsCached, D(Cls), CStr, NF
1278 Loads the class named S0 via the RDS. Invokes autoload and may raise an error
1279 if the class is not defined.
1281 | LdClsCachedSafe, D(Cls), CStr, B
1283 Loads the class whose name is S0 out of the RDS. If the class is not defined,
1286 | LdClsInitData, D(PtrToClsInitCell), S(Cls), NF
1288 Loads the pointer to the property initializer array for class S0.
1290 | LookupClsRDS, D(Cls|Nullptr), S(Str), NF
1292 Lookup the cached-class RDS handle for a given class name. Dereference that
1293 handle and return the associated Class, or null if not present.
1295 | LdCns, DCns, CStr, B
1297 Load the constant named S0, branching to B if isn't present.
1299 | LookupCnsE<T,constName>, DCns, CStr, PRc
1301 Load a constant via the RDS. Raises a fatal error if it cannot define the
1302 constant. This should only be executed if LdCns on the same constant has
1305 | LdClsCns<className,constantName>, D(PtrToGen), NA, B
1307 Load the address of the constant 'constantName' for the class 'className' in
1308 RDS. If not initialized, branch to B.
1310 | LdSubClsCns<constantName,slot>, D(PtrToGen), S(Cls), NF
1312 Load the address of the constant 'constantName' for the class S0. The
1313 constant is known to be in the given slot. If the returned TypedValue is not
1314 UncountedInit, its value should not be used, and a fallback method should be
1317 | LdSubClsCnsClsName<constantName,slot>, D(StaticStr|Nullptr), S(Cls), NF
1319 Loads the name of the class pointed by the constant 'constantName' for the
1320 class S0. The constant is known to be in the given slot. Returns nullptr if
1321 constant is abstract, not type constant or does not point to a class.
1323 | CheckSubClsCns<constantName,slot>, ND, S(Cls), B
1325 Check that the constant 'constantName' lives in the given slot for the class
1326 S0, and branch if not. S0 must have at least slot+1 constants.
1328 | LdClsCnsVecLen, D(Int), S(Cls), NF
1330 Load the size of S0's constant table.
1332 | LdTypeCns, DStaticDArr, S(InitCell), B
1334 Loads the resolved type constant S0 or branches to B if S0 is not resolved or
1335 not a type constant.
1337 | LdClsTypeCns, DStaticDArr, S(Cls) S(Str), NF
1339 Loads type constant S1 of class S0 or raises an error if no such constant
1340 could be found, or if S0::S1 is not a type constant.
1342 | LdClsTypeCnsClsName, D(StaticStr), S(Cls) S(Str), NF
1344 Loads the name of the class pointed by the type constant S1 of class S0 or
1345 raises an error if no such constant could be found, or if S0::S1 is not a
1348 | ProfileSubClsCns<constantName,handle>, D(PtrToGen), S(Cls), NF
1350 Load the address of the constant 'constantName' for the class S0, profiling
1351 the observed slots. If the returned TypedValue is not UncountedInit, its
1352 value should not be used, and a fallback method should be called.
1354 | LdClsMethodFCacheFunc<clsName,methodName>, D(Func), NA, B
1356 Loads the target cache entry for a forwarding call to clsName::methodName.
1357 If the method does not exist, or the cache hasn't been filled yet, branch to
1360 | LookupClsMethodFCache<clsName,methodName>,
1361 | D(Func|Nullptr), C(Cls) S(FramePtr),
1364 Lookup clsName::methodName in the forwarding class method cache. S0 should be
1365 the Class named by clsName and S1 should be the current vm frame pointer. May
1366 return Nullptr if lookup fails using a subset of the required lookup paths,
1367 indicating that a more complete lookup path should be taken. May throw if the
1368 method does not exist.
1370 | FwdCtxStaticCall, D(Cctx), S(Ctx), NF
1372 If S0 is an object, this opcode returns S0's class with the low bit set
1373 (i.e., as a Cctx). Otherwise this instruction returns S0.
1375 | LdClsMethodCacheFunc<clsName,methodName>, D(Func), NA, B
1377 Loads the target cache entry for the method clsName::methodName. If the
1378 method does not exist or the cache hasn't been filled yet, branch to B.
1380 | LdClsMethodCacheCls<clsName,methodName>, D(Cctx), NA, NF
1382 Loads the target cache class context entry for a call to clsName::methodName
1383 from the current context. This instruction must only be used when the value
1384 is known to not be empty (i.e., LdClsMethodCacheFunc must have succeeded, or
1385 LookupClsMethodCache returned a non-null value).
1387 | LookupClsMethodCache<clsName,methodName>, D(Func|Nullptr),
1391 Lookup a function in the class method targetcache. The class name and method
1392 name are clsName and methodName, respectively. S0 is the current vm frame
1393 pointer. Returns Nullptr if the method cannot be found using a subset of the
1394 required lookup paths, indicating that a more complete lookup path should be
1395 taken. May throw if the method does not exist.
1397 | LdIfaceMethod<vtableIdx,methodIdx>, D(Func), S(Cls), NF
1399 Load the Func* at methodIdx from the vtable at vtableIdx in S0.
1401 | LdFuncVecLen, D(Int), S(Cls,Cctx), NF
1403 Load the funcVecLen field from S0.
1405 | LdClsMethod, D(Func), S(Cls,Cctx) C(Int), NF
1407 Load a Func* off of the class method table for S0, at offset S1 (in method
1410 | LookupClsMethod<calleeAROffset,forward,dynamic>,
1412 | S(Cls) S(Str) S(StkPtr) S(FramePtr),
1415 Store a pointer to a class method into an activation record. S0 points to the
1416 class, S1 is the method name, S2 is a stack pointer that has an activation
1417 record to modify at `spToActRecOffset', and S3 is a pointer to the current
1418 frame (used to get the context). `forward` indicates if we should forward the
1419 current context. `dynamic` indicates if the method is called dynamically.
1420 Also perform caller checks (dynamic call, rx). May throw or fatal if method
1421 is not accessible or caller checks have failed.
1423 | LdPropAddr<T,offset>, DParam(LvalToPropGen), S(Obj), NF
1425 Load the address of the object property for S0 + `offset' (in bytes). T must
1426 be a subtype of PtrToPropGen.
1428 | LdInitPropAddr<T,offset>, DParam(LvalToPropGen), S(Obj), B
1430 Load the address of the object property for S0 + `offset' (in bytes). Branch
1431 if the value at that address is Uninit. T must be a subtype of
1434 | LdGblAddr, D(PtrToGblGen), S(Str), B
1436 Loads a pointer to a global. S0 is the global's name. Branches to B if the
1437 global is not defined.
1439 | LdGblAddrDef, D(PtrToGblGen), S(Str), NF
1441 Loads a pointer to a global. S0 is the global's name. Defines the global if
1442 it is not already defined.
1444 | LdClsPropAddrOrNull, D(PtrToSPropGen|Nullptr),
1445 | S(Cls) S(Str) C(Cls) C(Bool),
1448 Loads a pointer to a static class property. S0 points to the class, S1 is the
1449 property name, and S2 is the class representing the context of the code
1450 accessing the property. If class S0 does not have a visible and accessible
1451 static property named S1, then nullptr is returned. An exception
1452 will be thrown if the property is marked LateInit and its value is
1453 Uninit, unless S3 is true.
1455 | LdClsPropAddrOrRaise, D(PtrToSPropGen), S(Cls) S(Str) C(Cls) C(Bool), NF
1457 Loads a pointer to a static class property. S0 points to the class, S1 is the
1458 property name, and S2 is the class representing the context of the code
1459 accessing the property. If class S0 does not have a visible and accessible
1460 static property named S1, then nullptr is returned. An exception
1461 will be thrown if the property is marked LateInit and its value is
1462 Uninit, unless S3 is true.
1464 | LookupSPropSlot, D(Int), S(Cls) S(Str), NF
1466 Lookup the slot index of the static property with the name S1 on the class
1467 S0, returning -1 if not found.
1469 | LdObjMethod<methodName>, D(FuncMM), S(Cls) S(Smashable), NF
1471 Loads a func pointer, maybe with a magic bit set, pointing to the instance
1472 method that would be called if a `methodName` is invoked on an instance of S0.
1473 Caches the mapping in the TC cache (using S1) and target cache. Raises a fatal
1474 if the class does not have an accessible method with the given name and does
1475 not have a __call method.
1477 | LdObjInvoke, D(Func), S(Cls), B
1479 Try to load a cached non-static __invoke Func from the Class in S0, or branch
1480 to block B if it is not present.
1482 | LdArrFuncCtx<offset>, ND, S(Arr,Vec) S(StkPtr) S(FramePtr), NF
1484 Try to load an array as a function context. This is for use translating
1485 FPushFunc when the callee is an array. This instruction attempts to populate
1486 a partially created ActRec pointed to by S1 + `offset' (in cells). It is also
1487 responsible for performing caller checks (dynamic call, rx).
1489 | LdObjClass, DLdObjCls, S(Obj), NF
1491 Load the class out of the object in S0 and put it in D.
1493 | LdClsName, D(StaticStr), S(Cls), NF
1495 Load the name of the Class* in S0.
1497 | LdFunc<offset>, ND, S(Str) S(StkPtr) S(FramePtr), NF
1499 Resolve the Func whose name is S0. Perform caller checks (dynamic call, rx).
1500 Then store the Func into the partially constructed ActRec pointed to by
1501 S1 + `offset` (in cells). Also populate the m_this/m_cls field if necessary.
1502 Fatal if the named function is not defined, and the autoloader fails to
1505 | LdFuncCached<funcName>, D(Func), NA, NF
1507 Loads the Func whose name is funcName from the RDS, invoking autoload if it
1508 not defined yet. Fatal if function autoloader fails to define it.
1510 | LookupFuncCached<funcName>, D(Func), NA, NF
1512 Loads the Func whose name is given from %1, invoking autoload if it is not
1513 defined yet. Fatal if the function autoload fails to define it. This
1514 instruction does not assume the loaded function will be called immediately,
1515 so it will raise a resolution failure error instead of a call failure error.
1517 | LdARFuncPtr<offset>, DParam(Func), S(StkPtr), NF
1519 Loads the m_func member of an ActRec. S0 is the base address, with `offset'
1520 cells to the ActRec.
1522 | LdARCtx<T,offset>, DParam(Ctx), S(StkPtr), NF
1524 Loads the m_this/m_cls member of an ActRec. S0 is the base address, with
1525 `offset' cells to the ActRec.
1527 | LdARIsDynamic<offset>, D(Bool), S(StkPtr), NF
1529 Loads the dynamic call flag of a pre-live ActRec. S0 is the base address,
1530 with `offset' cells to the ActRec.
1532 | LdARNumParams, D(Int), S(FramePtr), NF
1534 Loads the number of params from an ActRec. S0 is the address of the ActRec
1536 | LdFuncNumParams, D(Int), S(Func), NF
1538 Returns the value of func->numParams().
1540 | LdFuncName, D(StaticStr), S(Func), NF
1542 Loads the full name of S0.
1544 | LdStrLen, D(Int), S(Str), NF
1546 Load the length of the string in S0.
1548 | FuncSupportsAsyncEagerReturn, D(Bool), S(Func), NF
1550 Tests for Func::m_attrs & AttrSupportsAsyncEagerReturn.
1552 | IsFuncDynCallable, D(Bool), S(Func), NF
1554 Tests for Func::m_attrs & AttrDynamicallyCallable.
1556 | IsClsDynConstructible, D(Bool), S(Cls), NF
1558 Tests for Class::m_attrCopy & AttrDynamicallyConstructible.
1560 | LdFuncRxLevel, D(Int), S(Func), NF
1562 Returns the value of func->rxLevel().
1564 | IsReifiedName, D(Bool), S(Str), NF
1566 Tests whether the name in S0 is name of a reified class or function.
1568 | LdReifiedGeneric, DVArr, S(Str), NF
1570 Loads the reified generics associated with the name at S0. This name can be a
1571 class name or a function name. Raises an error if this name does not have
1572 any associated reified generics.
1574 | LdClsFromClsMeth, D(Cls), S(ClsMeth), NF
1576 Load the Class* of the ClsMethDataRef in S0.
1578 | LdFuncFromClsMeth, D(Func), S(ClsMeth), NF
1580 Load the Func* of the ClsMethDataRef in S0.
1584 | AllocObj, DAllocObj, S(Cls), PRc
1586 Allocates a new object of class S1.
1588 | AllocObjReified, DAllocObj, S(Cls) SVArr, PRc
1590 Allocates a new object of class S1 and sets S2 as the reified generics of this
1591 class. If this class is not reified, this instruction raises an error.
1593 | InitProps<class>, ND, NA, NF
1595 Calls the property initializer function (86pinit) for class. May throw.
1597 | InitSProps<class>, ND, NA, NF
1599 Calls the static property initializer functions (86sinit and/or 86linit)
1600 for class. May throw.
1602 | CheckRDSInitialized<RDSHandle>, ND, NA, B
1604 Check if the RDS entry at the specified handle is initialized, and branches
1607 | MarkRDSInitialized<RDSHandle>, ND, NA, NF
1609 Mark the given RDS entry as being initialized.
1611 | PropTypeRedefineCheck, ND, C(Cls) C(Int), NF
1613 Check that the specified property at the slot S1 on S0, which redeclares a
1614 property in the parent, has a declared type equivalent to the parent
1617 | DebugBacktrace, DVArr, S(Int), PRc
1619 Obtain stack trace by calling the debug_backtrace() method.
1621 | DebugBacktraceFast, D(Res), NA, PRc
1623 Obtain compact stack trace resource that can be expanded lazily.
1625 | InitThrowableFileAndLine, ND, S(Obj), NF
1627 Initialize Throwable's file name and line number assuming the stack trace
1628 was already initialized and the current vmfp() is a built-in.
1630 | NewInstanceRaw<class>, DAllocObj, NA, PRc
1632 Allocates an instance of class.
1634 | InitObjProps<class>, ND, S(Obj), NF
1636 Initializes properties of object S0.
1638 | ConstructInstance<class>, DAllocObj, NA, NF
1640 Call the custom instance constructor of an extension class.
1642 | ConstructClosure<class>, DAllocObj, NA, NF
1644 Call the custom instance constructor of a Closure.
1646 | NewArray, D(Arr), C(Int), PRc
1648 Allocate a new array with the expected capacity S0.
1650 | NewMixedArray, DArrMixed, C(Int), PRc
1652 Allocate a new array in mixed mode with the expected capacity S0.
1654 | NewDArray, DArrMixed, C(Int), PRc
1656 Allocate a new dict-like array with the expected capacity S0.
1658 | NewDictArray, D(Dict), C(Int), PRc
1660 Allocate a new dict with the expected capacity S0.
1662 | NewKeysetArray<offset,keys>, D(Keyset), S(StkPtr), PRc|CRc
1664 Allocate a new keyset containing N elements off the stack given by S0, at
1665 `offset'. This instruction moves the elements off the stack without
1666 manipulating their reference counts.
1668 | NewLikeArray, D(Arr), S(Arr) C(Int), PRc
1670 Allocate a new array in the same mode as S0 and with expected capacity S1,
1671 unless S1 == 0, in which case the capacity is set to S0's size.
1673 | AllocPackedArray<size>, DArrPacked, NA, PRc
1675 Allocate a new uninitialized packed array with space for size elements in it.
1676 The array will be initialized with values using either InitPackedLayoutArray
1677 or InitPackedLayoutArrayLoop.
1679 | AllocVArray<size>, DArrPacked, NA, PRc
1681 Allocate a new uninitialized vec-like array with space for size elements in
1682 it. The array will be initialized with values using either
1683 InitPackedLayoutArray or InitPackedLayoutArrayLoop.
1685 | AllocVecArray<size>, D(Vec), NA, PRc
1687 Allocate a new uninitialized vector array with space for size elements in it.
1688 The array will be initialized with values using either InitPackedLayoutArray
1689 or InitPackedLayoutArrayLoop.
1691 | InitPackedLayoutArray<index>, ND, S(Arr,Vec) S(Cell), NF
1693 Store the S1 into the slot at index in array S0. This instruction assumes
1694 that it doesn't have to incref the value being stored. Used to initialize an
1695 array allocated with AllocPackedArray or AllocVecArray.
1697 | InitPackedLayoutArrayLoop<offset,size>, ND, S(Arr,Vec) S(StkPtr), CRc
1699 Move `size' elements from the stack given by S1, at `offset', into the array
1700 S0. Assumes that the first element on the stack is the last element in the
1701 array. Used to initialize an array allocated with AllocPackedArray or
1702 AllocVecArray that was too big to use a series of InitPackedLayoutArray
1705 | NewRecord<offset,keys...>, D(Record), S(RecType) S(StkPtr), PRc|CRc
1707 Allocate a new record, given the type S0 and N immediate keys
1708 and taking N elements off the stack given by S1, at `offset'.
1709 This instruction assumes it can take the values from the stack
1710 without increfing them.
1712 | NewStructArray<offset,keys...>, DArrMixed, S(StkPtr), PRc|CRc
1714 Allocate a new key/value array, given N immediate keys and taking N elements
1715 off the stack given by S0, at `offset'. This instruction assumes it can take
1716 the values from the stack without increfing them.
1718 | NewStructDArray<offset,keys...>, DArrMixed, S(StkPtr), PRc|CRc
1720 Allocate a new key/value dict-like array, given N immediate keys and taking N
1721 elements off the stack given by S0, at `offset'. This instruction assumes it
1722 can take the values from the stack without increfing them.
1724 | NewStructDict<offset,keys...>, D(Dict), S(StkPtr), PRc|CRc
1726 Allocate a new key/value dict array, given N immediate keys and taking N
1727 elements off the stack given by S0, at `offset'. This instruction assumes it
1728 can take the values from the stack without increfing them.
1730 | NewCol<type>, DCol, NA, PRc
1732 Create an empty new collection of `type'. `type' cannot be Pair.
1734 | NewPair<offset>, DCol, S(Cell) S(Cell), PRc|CRc
1736 Allocate a new Pair and fill it with the given cells. Ownership of the cells
1737 is transferred from $1 and $2 to the pair without manipulating the refcounts.
1739 | NewColFromArray<type>, DCol, S(Vec|Dict), PRc|CRc
1741 Create a collection of `type` from a Vec or Dict kind. `type` cannot be
1742 Pair. S0 must be vec kind when `type` is Vector or ImmVector, and must be
1743 dict kind otherwise. Ownership of S0 is transferred from $1 to the
1744 collection, without manipulating the refcount.
1746 | Clone, DofS(0), S(Obj), PRc
1748 Allocate an object by cloning S0.
1750 | NewClsMeth, D(ClsMeth), S(Cls) S(Func), NF
1752 Allocate a new ClsMethDataRef.
1756 | SpillFrame<offset,numArgs>,
1758 | S(StkPtr) S(Func,Nullptr) S(Ctx,Cls,Nullptr) S(Str,Nullptr) S(Bool)
1759 | S(Arr|Vec,Nullptr),
1764 S0 - caller stack pointer
1765 S1 - callee Func or nullptr
1766 S2 - object (for FPushObjMethod*), class (for FPushClsMethod*), context
1767 (for FPushClsMethodF), or nullptr (for FPushFunc*).
1768 S3 - invoke name for magic dispatch
1769 S4 - whether this is a "dynamic" call
1770 S5 - reified generics type structure list
1772 Defines the fields for an activation record and writes them to the stack
1773 pointed to by S0, at `offset'.
1775 | BeginInlining<offset>, ND, S(StkPtr), NF
1777 Marks the start of an inlined function whose stack resides offset cells below
1778 the SP. It has no effect other than to hint to optimization passes that at the
1779 start of the inlined function its stack is dead.
1781 | DefInlineFP<func,callBCOff,retSPOff>, D(FramePtr),
1782 | S(StkPtr) S(FramePtr),
1785 Defines a frame pointer for an inlined function.
1787 `func' is the function being inlined. `callBCOff' points to the caller's
1788 FCall instruction, `retSPOff' represents what the stack offset should be
1789 after the FCall instruction in the caller.
1791 This instruction is primarily used to represent a frame in the IR in a way
1792 that allows us to eliminate it entirely. When it cannot be eliminated (or if
1793 it is pushed into an unlikely path) it performs callee-side responsibilities
1794 for setting up an activation record (i.e. setting the return ip and m_callOff,
1795 storing the frame pointer into D).
1797 The caller frame pointer is passed as S1. This is used to keep track of the
1798 call chain of inlined functions for simplification and dead code elimination.
1800 | InlineReturn<callerFPOff>, ND, S(FramePtr), NF
1802 Unlinks a frame constructed by DefInlineFP. `callerFPOff' is the offset of
1803 the caller's frame pointer relative to S0. Every inline region must contain
1804 exactly one InlineReturn or InlineReturnNoFrame. Optimization passes which
1805 attempt to elide DefInlineFP detect "main" blocks within an inlined region as
1806 those which are dominated by BeginInlining and post-dominated by InlineReturn.
1808 | InlineSuspend<callerFPOff>, ND, S(FramePtr), NF
1810 Identical to an InlineReturn, but for use when the frame is being suspended in
1811 a side exit and will be torn down via an InlineReturn in the main trace. The
1812 behavior of InlineSuspend is identical to inline return, but it allows us to
1813 preserve the invariant that an inline region has a single InlineReturn for
1814 every DefInlineFP (while still allowing InlineSuspend in the case of a side
1817 | InlineReturnNoFrame<InlineFrameStart>, ND, NA, NF
1819 Mark the end of an inlined function for which no DefInlineFP was required. The
1820 primary purpose of this instruction is to mark the result of a SpillFrame as
1821 dead. InlineFrameStart is the caller FP-relative offset of the start of the
1822 callee frame. Everything below InlineFrameStart is dead.
1824 | CallUnpack<spOffset,numParams,callOff,funcd,destroyLocals>,
1826 | S(StkPtr) S(FramePtr),
1829 Invoke function corresponding to the current FPI with numParams arguments,
1830 the last of which is an array of the remaining args. Used for FCall with
1831 unpack. S0+spOffset points to the stack resulting after the ActRec for the
1832 function and numParams arguments have been pushed. CallUnpack pops the array
1833 off the stack, pushes the elements of the array as arguments, and invokes the
1834 function in the ActRec.
1836 | SyncReturnBC<spOffset,callBCOffset>, ND, S(StkPtr) S(FramePtr), NF
1838 Stores callBCOffset into the frame at spOffset from S0 as the call bytecode
1839 address and the frame S1 as the return frame.
1841 | Call<offset,numParams,callOff,funcd,destroyLocals>, DCall,
1842 | S(StkPtr) S(FramePtr),
1845 Transfer control to a callee, based on the pre-live activation record and set
1846 of args on the stack pointed to by S0 at `offset'. S1 is the current caller
1847 frame pointer. The `funcd' in the extra data is a Func* for the callee if we
1848 know the callee statically.
1850 | NativeImpl<func>, ND, S(FramePtr) S(StkPtr), NF
1852 Execute a call to the native builtin specified by the current function. S0
1853 and S1 should be the current vmfp and vmsp, respectively.
1855 | CallBuiltin, DBuiltin, S(FramePtr) S(StkPtr) SVar(PtrToGen,Gen,Cls,Nullptr), PRc
1857 Call builtin function with N arguments. S0 and S1 should be the current vmfp
1858 and vmsp, respectively.
1860 The source and destination types correspond to C++ parameter and return types
1863 C++ type HHIR type Position
1864 ----------------- --------- --------
1865 bool Bool source, destination
1866 int64_t Int source, destination
1867 double Dbl source, destination
1868 const String& PtrToStr source
1869 const Array& PtrToArr source
1870 const Object& PtrToObj source
1871 const Variant& PtrToGen source
1872 Variant& PtrToGen source (ref param)
1873 String {Str|InitNull} destination
1874 Array {Arr|InitNull} destination
1875 Object {Obj|InitNull} destination
1876 Variant {Gen-UninitNull} destination
1878 | RetCtrl<spOff,suspendingResumed>, ND, S(StkPtr) S(FramePtr) S(Gen), T
1880 Ensure that S0 + `spOff' (in cells) is stored in rvmsp and that S1's saved
1881 frame pointer is stored in rvmfp, then return to the saved return address in
1882 S1. The return value is S2, which is passed via the rret_*() registers to
1883 the caller. The `suspendingResumed' flag indicates when this instruction is
1884 suspending a resumable rather than performing a normal function return.
1886 | AsyncFuncRet<spOff>, ND, S(StkPtr) S(FramePtr) S(Cell), T
1888 Return from a resumed async function, assuming no surprise. Ensures that
1889 S0 + `spOff` (in cells) is stored in rvmsp and that S1 is stored in rvmfp,
1890 packs return value S2 into registers and calls the `asyncFuncRet` unique
1891 stub. The stub stores the result into the wait handle associated with the
1892 frame pointer, marks it as finished, unblocks its parents and if possible,
1893 directly resumes the first parent (fast path), or a pending fast runnable
1894 ResumableWaitHandle (slower path). Otherwise, it will exit VM and return
1895 control to the asio scheduler (slow path). The stack must contain exactly one
1896 cell containing uninitialized garbage, which will be populated by the stub
1897 either to pass the return value to the resumed function, or to return null
1900 | AsyncFuncRetSlow<spOff>, ND, S(StkPtr) S(FramePtr) S(Cell), T
1902 Return from a resumed async function, assuming unknown surprise flag state
1903 after the previous surprise was handled by executing "return" event hook.
1904 Calls the `asyncFuncRetSlow` stub, which re-checks the surprise flag and
1905 transfers control to the AsyncFuncRet if it was clear, or performs the slow
1906 path of AsyncFuncRet if it was not, without resuming another function, as
1907 we are not able to call a potential "resume await" event hook from the stub.
1909 | AsyncSwitchFast<spOff>, ND, S(StkPtr) S(FramePtr), T
1911 Switch control to another ResumableWaitHandle. Ensures that S0 + `spOff`
1912 (in cells) is stored in rvmsp and that S1 is stored in rvmfp and calls the
1913 `asyncSwitchCtrl` unique stub, which tries to resume a pending fast runnable
1914 ResumableWaitHandle (fast path) if possible, otherwise it will exit VM and
1915 return control to the asio scheduler (slow path). As with AsyncRetFast, the
1916 stack must contain exactly one cell containing uninitialied garbage.
1918 | LdRetVal<T>, DParam(Gen), S(FramePtr), NF
1920 Load the return value from the already-returned-from ActRec pointed to by S0
1921 into the dest. This is used by NativeImpl. TODO(#7150575): We want to make
1922 NativeImpl return a TypedValue in the C++ ABI registers.
1924 | DbgTrashRetVal, ND, S(FramePtr), NF
1926 For debugging purposes. Store kTVTrashJITRetVal to the return value slot on
1927 the activation record pointed to by S0.
1929 | ReleaseVVAndSkip, ND, S(FramePtr), B
1931 Loads the VarEnv slot off the ActRec pointed to by S0. If it is null, does
1932 nothing. If it is an ExtraArgs, deallocates the ExtraArgs structure.
1933 Otherwise it frees the VarEnv and jumps to block B. This instruction may not
1934 occur in an inlined call.
1936 | GenericRetDecRefs, ND, S(FramePtr), NF
1938 Does decrefs of all the current function's locals, where S0 is a pointer to
1939 the relevant activation record. This instruction may not occur in an inlined
1945 | StMem, ND, S(MemToGen) S(Gen), NF
1947 Store S1 into the location pointed to by S0.
1949 | StElem, ND, S(PtrToCell) S(Int) S(Cell), NF
1951 Store S2 into the location given by the index S1 from base pointer S0. The
1952 index in S1 is the number of bytes from the base in S0.
1954 | StLoc<localId>, ND, S(FramePtr) S(Gen), NF
1956 Store S1 to local number localId on the frame pointed to by S0.
1958 | StLocPseudoMain<localId>, ND, S(FramePtr) S(Gen), NF
1960 Behaves just like StLoc, except the hard requirement that it is only emitted
1961 for pseudo-mains. We don't optimize StGbl the same way as StLoc, as we need
1962 intraprocedural analysis to know whether the store is truly dead.
1964 | StLocRange<localIds>, ND, S(FramePtr) S(Gen), NF
1966 Store S1 to the local variables corresponding to localIds, on the frame
1969 | StClsRefCls<slot>, ND, S(FramePtr) S(Cls), NF
1971 Store S1 to class-ref's cls slot `slot` on the frame pointed to by S0.
1973 | StClsRefTS<slot>, ND, S(FramePtr) SVArr, NF
1975 Store S1 to class-ref's reified generic slot `slot` on the frame pointed to
1978 | StRef, ND, S(BoxedCell) S(Cell), NF
1980 Store the value in S1 into the RefData pointed to by S0. Stores the
1981 RefData::m_type also.
1983 | StStk<offset>, ND, S(StkPtr) S(Gen), NF
1985 Store S1 to the stack pointed to by S0, at a given offset (in cells).
1987 | StOutValue<index>, ND, S(FramePtr) S(Gen), NF
1989 Store S1 in a caller allocated out-value vm stack cell index cells above
1992 | DbgTrashStk<offset>, ND, S(StkPtr), NF
1994 For debugging purposes. Store kTVTrashJITStk to the stack slot pointed to
1995 by S0, at a given offset (in cells).
1997 | DbgTrashFrame<offset>, ND, S(StkPtr), NF
1999 For debugging purposes. Store kTVTrashJITFrame to kNumActRecCells stack
2000 slots starting at the offset (in cells), and going toward higher memory
2003 | DbgTrashMem, ND, S(MemToGen), NF
2005 For debugging purposes. Store kTVTrashJITHeap to a heap slot pointed to by
2008 | RecordReifiedGenericsAndGetName, D(StaticStr), SVArr, CRc
2010 Takes a varray of reified generics from the stack, adds them to the reified
2011 generics table and returns mangled name used as the key
2013 | RecordReifiedGenericsAndGetTSList, DVArr, SVArr, CRc
2015 Takes a varray of reified generics from the stack and adds them to the reified
2016 generics table and returns the input varray of reified generics, possibly
2019 | MangleReifiedName, D(StaticStr), S(StaticStr) S(StaticStr), NF
2021 Mangles the name from S0 with the mangled type structure string from S1
2026 | EagerSyncVMRegs, ND, S(FramePtr) S(StkPtr), NF
2028 Sync the given vmfp and vmsp to their in-memory locations.
2030 | ReqBindJmp<bcOff,transFlags>, ND, S(StkPtr) S(FramePtr), T
2032 Emit a jump to a REQ_BIND_JMP service request to the target offset bcOff.
2034 | ReqRetranslate<transFlags>, ND, S(StkPtr) S(FramePtr), T
2036 Emit a jump to a service request that will chain to a retranslation of this
2039 This instruction is used in exit traces for a type prediction that occurs at
2040 the first bytecode offset of a tracelet.
2042 | ReqRetranslateOpt<transId,bcOff>, ND, S(StkPtr) S(FramePtr), T
2044 Emit a service request to retranslate, with a higher optimization gear,
2045 translation transID, which starts at bcOff. This instruction is used in exit
2046 traces that trigger profile-guided optimizations.
2049 12. Refcounting and copies
2051 | Mov, DofS(0), S(Top), P
2053 Defines D as S0. May imply register-to-register moves at code generation
2054 time. Does not imply an incref or any other manipulation of S0.
2056 | IncRef, ND, S(Gen,Ctx), NF
2058 If S0 is a refcounted type, increment its refcount.
2060 | DecRef<locId>, ND, S(Gen,Ctx), CRc
2062 Decrease the reference count of S0 by one, and call a destructor for types
2063 that require it if it goes to zero.
2065 Note that although DecRef takes a Gen, we don't allow it to use information
2066 about the inner types of a BoxedCell. This is because we don't guard on the
2067 inner types of a BoxedCell except when doing LdRef. For any S0 that is a
2068 strict subtype of BoxedCell, the DecRef must just decref it as if it were a
2071 The locId is just a hint to the runtime indicating which local variable is
2072 being DecRef'd, if any.
2074 | DecRefNZ, ND, S(Gen,Ctx), CRc
2076 Decrease the reference count of S0 by one, do not check if it goes to zero.
2077 This instruction can be used for more efficient code when it is provable that
2078 the reference count cannot go to zero.
2083 | DefFP, D(FramePtr), NA, NF
2085 Creates a temporary D representing the current vm frame pointer.
2087 | DefSP<stackOff>, D(StkPtr), S(FramePtr), NF
2089 Creates a temporary D representing the current vm stack pointer. S0 is a
2090 pointer to the current frame. The 'stackOff' is the logical offset between S0
2091 and the stack pointer, but in the case of generators this is not the
2092 physical offset at runtime.
2094 This instruction is used at the beginning of tracelets to represent the state
2095 of the stack on entry and does not emit code.
2097 | FuncGuard<func,prologueAddrPtr>, ND, NA, NF
2099 Emits a function guard for func, and arranges to write the address of the
2100 following instruction to prologueAddrPtr.
2102 | Count, D(Int), S(Cell), NF
2104 Computes the number of elements in S0. The count of an array is the number of
2105 elements it contains, without recursing into containers in the array.
2106 Subtypes of Bool|Int|Dbl|Str|Res have a count of 1, subtypes of Null have a
2107 count of 0. The count of objects that implement the Countable interface is
2108 computed by returning the value of their count method. Objects that do not
2109 implement Countable have a count of 1.
2111 | CountArray, D(Int), S(Arr), NF
2113 | CountArrayFast, D(Int), S(Arr), NF
2115 | CountVec, D(Int), S(Vec), NF
2117 | CountDict, D(Int), S(Dict), NF
2119 | CountShape, D(Int), S(Shape), NF
2121 | CountKeyset, D(Int), S(Keyset), NF
2123 | CountCollection, D(Int), S(Obj), NF
2125 Computes the number of elements in S0 using the same definition as Count, but
2126 with a restriction on the input type.
2128 CountArray expects any array. CountArrayFast expects an array whose kind is
2129 not kGlobalsKind. CountCollection expects a collection object.
2133 Does nothing. It's sometimes useful for the simplifier to insert one of these
2134 in the instruction stream.
2136 | ExitPlaceholder, ND, NA, B
2138 Does nothing if executed. Semantically, this instruction carries a taken edge
2139 to a block that was a pure side-exit during initial IR generation. This
2140 allows later passes to test conditions and create new exits from the region
2141 at this point in the program.
2145 | VerifyParamCls, ND, S(Cls) S(Cls|Nullptr) C(Int) C(Int), NF
2147 Verify parameter type for classes or traits. If S0 does not extend (if S1 is
2148 a class) or implement (if S1 is an interface) S1, this instruction will raise
2149 a recoverable fatal error describing the type mismatch.
2151 | VerifyParamCallable, ND, S(Gen) C(Int), NF
2153 If S0 is not callable, as defined by the php function is_callable, this
2154 instruction will raise a recoverable fatal error describing the type
2157 | VerifyParamFail, ND, C(Int), NF
2159 Assumes that parameter number S0 in the current function has failed a its
2160 type check. Depending on the typehint being verified and a number of runtime
2161 options, may coerce the parameter to the correct type or raise a recoverable
2162 fatal error describing the type mismatch.
2164 | VerifyParamFailHard, ND, C(Int), T
2166 A terminal version of VerifyParamFail, to be used when the compiler can
2167 statically prove that this failure will result in a fatal error rather than a
2170 | VerifyRetCallable, ND, S(Gen), NF
2172 Verify a return type hint.
2174 | VerifyRetCls, ND, S(Cls) S(Cls|Nullptr) C(Int) S(Cell), NF
2176 Verify a return type hint.
2178 | VerifyRetFail, ND, S(PtrToGen), NF
2180 Failure to verify a return type hint.
2182 | VerifyRetFailHard, ND, S(PtrToGen), T
2184 Terminal version of VerifyRetFail, to be used when the compiler can prove
2185 that this failure will result in a fatal error.
2187 | VerifyPropCls, ND, S(Cls) S(Int) S(Cls|Nullptr) S(Obj) C(Bool), NF
2189 Verify a property type hint with AnnotType::Object against an object
2190 value. S0 is the class of the object containing the property. S1 is the slot
2191 of the property on the class. S3 is the object which is being set in the
2192 property. If S2 is not nullptr, than the type-hint refers to that Class, and
2193 S3 will be checked to see if its an instance of S2. Otherwise, the type-hint
2194 refers to a type-alias, and the alias will be resolved and checked against
2195 S3. S4 is true if this is a static property, false otherwise.
2197 | VerifyPropFail, ND, S(Cls) S(Int) S(Cell) C(Bool), NF
2199 Failure to verify a property type hint. S0 is the class of the object
2200 containing the property. S1 is the slot of the property on the class. S2 is
2201 the value which was being set in the property. S3 is true if this is a static
2202 property, false otherwise.
2204 | VerifyPropFailHard, ND, S(Cls) S(Int) S(Cell) C(Bool), T
2206 Terminal version of VerifyPropFail, to be used when the compiler can prove
2207 that this failure will result in a fatal error.
2209 | VerifyProp, ND, S(Cls) S(Int) S(Cell) C(Bool), NF
2211 Verify that S2 is compatible with the type hint for the property at slot S1
2212 on S0. S3 is true if this is a static property, false otherwise.
2214 | VerifyReifiedLocalType<id>, ND, SDArr, NF
2216 Raises a catchable type hint error if the reified generics of function
2217 parameter id does not match the type structure given on S0.
2219 | VerifyReifiedReturnType, ND, S(Cell) SDArr, NF
2221 Raises a catchable type hint error if the reified generics of S0 does not
2222 match the type structure given on S1.
2224 | RaiseHackArrParamNotice<type,id,isReturn>, ND, S(Arr) S(Func), NF
2226 Raise a HackArrCompatNotice corresponding to a parameter or return type-hint
2227 d/varray mismatch. S0 is the array being passed in. S1 is the function being
2230 | RaiseHackArrPropNotice<type>, ND, S(Cls) S(Arr) S(Int) C(Bool), NF
2232 Raise a HackArrCompatNotice corresponding to a property type-hint d/varray
2235 | RaiseUninitLoc<localId>, ND, S(Str), NF
2237 Raise a notice for an uninitialized local variable.
2239 | RaiseUndefProp, ND, S(Obj) CStr, NF
2241 Raise a notice for an undefined property named S1 on the class of S0.
2243 | RaiseMissingArg<func,argc>, ND, NA, NF
2245 Raise a missing argument warning because only argc arguments were passed to
2248 | RaiseTooManyArg<func,argc>, ND, NA, NF
2250 Raise a too many argument warning because argc arguments were passed to
2253 | RaiseError, ND, S(Str), T
2255 Raises a fatal error with the text in S0 as its message.
2257 | RaiseWarning, ND, S(Str), NF
2259 Raises a warning with the text in S0 as its message.
2261 | RaiseNotice, ND, S(Str), NF
2263 Raises a notice with the text in S0 as its message.
2265 | RaiseArrayIndexNotice<isInOut>, ND, S(Int), NF
2267 Raises a notice that S0 is an undefined index for an array. The isInOut option
2268 indicates that the access was for an inout parameter.
2270 | RaiseArrayKeyNotice<isInOut>, ND, S(StaticStr), NF
2272 Raises a notice that S0 is an undefined key for an array. The isInOut option
2273 indicates that the access was for an inout parameter.
2275 | RaiseMissingThis, ND, S(Func), NF
2277 Raises an appropriate notice or fatal to indicate that Func was
2278 called with null $this. In most cases its a notice, but for
2279 builtins and special class methods its a fatal.
2281 | ThrowHasThisNeedStatic, ND, S(Func), T
2283 Throws a BadMethodCallException to indicate that func was called on an object
2284 but is a static method.
2286 | FatalMissingThis, ND, S(Func), T
2288 Similar to RaiseMissingThis, but for cases where we know it will fatal.
2290 | RaiseHackArrCompatNotice, ND, S(Str), NF
2292 Raises a Hack array compat notice with the text in S0 as its message.
2294 | ThrowParamRefMismatch<paramIndex>, ND, S(Func), T
2296 Throw an exception indicating that the reffiness of a parameter was
2297 incorrectly annotated at the callsite.
2299 | ThrowParamRefMismatchRange<firstBit,mask,vals>, ND, S(Func), T
2301 Throw an exception indicating that the reffiness of at least one parameter
2302 within a given range was incorrectly annotated at the callsite.
2304 See CheckRefs for meaning of firstBit, mask and vals.
2306 | RaiseForbiddenDynCall, ND, S(Func), NF
2308 Depending on the setting of the `ForbidDynamicCalls` runtime option, either
2309 raise a warning or throw an exception indicating that the func specified in
2310 S0 was called dynamically (and should not be).
2312 | RaiseForbiddenDynConstruct, ND, S(Cls), NF
2314 Depending on the setting of the `ForbidDynamicCalls` runtime option, either
2315 raise a warning or throw an exception indicating that the class specified in
2316 S0 was constructed dynamically (and should not be).
2318 | RaiseRxCallViolation, ND, S(FramePtr) S(Func), NF
2320 Depending on the setting of the `RxEnforceCalls` runtime option, either raise
2321 a warning or throw an exception indicating that the caller specified by S0
2322 was violating reactivity constraints when calling the callee specified by S1.
2324 | RaiseStrToClassNotice, ND, S(Str), NF
2326 Raise a notice if a string is implicitly converted to a class.
2328 | CheckClsReifiedGenericMismatch<cls>, ND, SVArr, NF
2330 Raises a runtime error unless whether each generic in S0 is reified or erased
2331 matches exactly to the expectations of the cls.
2333 | CheckFunReifiedGenericMismatch<func>, ND, SVArr, NF
2335 Raises a runtime error unless whether each generic in S0 is reified or erased
2336 matches exactly to the expectations of the func.
2338 | IsFunReifiedGenericsMatched<func>, D(Bool), S(FramePtr), NF
2340 Load the value of m_reifiedGenerics on the ActRec pointed to by the frame
2341 pointer S0 and does the fast path for checking whether the number of generics
2342 and whether erased versus reified parity match.
2343 If the function has soft generics or the number of generics is greater than
2344 ReifiedGenericsPtr::kMaxTagSize, returns false.
2346 | InitClsCns<className,constName>, DCns, NA, PRc
2348 Initialize the RDS entry for a constant for a class, invoking autoload if it
2349 is not defined. The initialized value is returned. This instruction may raise
2350 an undefined constant error if autoload cannot define the constant.
2352 | PrintStr, ND, S(Str), CRc
2354 | PrintInt, ND, S(Int), CRc
2356 | PrintBool, ND, S(Bool), CRc
2358 Print for various types.
2360 | ConcatIntStr, D(Str), S(Int) S(Str), PRc
2362 Concatenate S0 and S1 after converting S0 to String.
2364 | ConcatStrInt, D(Str), S(Str) S(Int), CRc|PRc
2366 Concatenate S0 and S1 after converting S1 to String.
2368 | ConcatStrStr, D(Str), S(Str) S(Str), CRc|PRc
2370 Concatenate S0 and S1.
2372 | ConcatStr3, D(Str), S(Str) S(Str) S(Str), CRc|PRc
2374 Concatenate S0, S1, and S2.
2376 | ConcatStr4, D(Str), S(Str) S(Str) S(Str) S(Str), CRc|PRc
2378 Concatenate S0, S1, S2, and S3.
2380 | AddElemStrKey, D(Arr), S(Arr) S(Str) S(Cell), CRc|PRc
2382 Add S2 to the array S0 for the key S1, and return the resulting array.
2384 | AddElemIntKey, D(Arr), S(Arr) S(Int) S(Cell), CRc|PRc
2386 Add S2 to the array S0 for the key S1, and return the resulting array.
2388 | AddNewElem, D(Arr), S(Arr) S(Cell), CRc|PRc
2390 | AddNewElemKeyset, D(Keyset), S(Keyset) S(Cell), CRc|PRc
2392 | AddNewElemVec, D(Vec), S(Vec) S(Cell), CRc|PRc
2394 Add S1 as a new element to the array/keyset/vec S0. (Note: S1 must actually
2395 be a subtype of InitCell for array invariants, but we can't assert this yet
2396 in the IR because many eval stack slots are not entirely typed wrt initness
2399 | DictAddElemStrKey, D(Dict), S(Dict) S(Str) S(Cell), CRc|PRc
2401 Add S2 to the dict S0 for the key S1, and return the resulting dict.
2403 | DictAddElemIntKey, D(Dict), S(Dict) S(Int) S(Cell), CRc|PRc
2405 Add S2 to the dict S0 for the key S1, and return the resulting dict.
2407 | ArrayAdd, D(Arr), S(Arr) S(Arr), CRc|PRc
2409 Has the effects of the php + operator on the two source arrays.
2411 | AKExistsArr, D(Bool), S(Arr) S(Int,Str), NF
2413 Has the effects of array_key_exists(S0, S1).
2415 | AKExistsDict, D(Bool), S(Dict) S(Int,Str), NF
2417 Has the effects of array_key_exists(S0, S1).
2419 | AKExistsKeyset, D(Bool), S(Keyset) S(Int,Str), NF
2421 Has the effects of array_key_exists(S0, S1).
2423 | AKExistsObj, D(Bool), S(Obj) S(Int,Str), NF
2425 Has the effects of array_key_exists(S0, S1) on an object S0. This either does
2426 collection accesses, or uses the ArrayAccess API.
2428 | GetMemoKey, DMemoKey, S(Cell), PRc
2430 Given a cell, produces a string or an int that can be used as a memoize cache
2431 key. Valid values for the input include all basic types, arrays and
2432 collections, and objects that implement IMemoizeParam. Any other type will
2433 cause GetMemoKey to throw. This op can only be used within functions marked
2434 as memoize wrappers.
2436 | GetMemoKeyScalar, DMemoKey, S(Uncounted,Str), PRc
2438 Identical to GetMemoKey but only accepts scalar types and cannot produce
2441 | ArrayIdx, DArrElem, S(Arr) S(Int,Str) S(Cell), NF
2443 Checks if S0 contains the key S1, and returns the result if found. Otherwise
2446 | DictIdx, DDictElem, S(Dict) S(Int,Str) S(Cell), NF
2448 Checks if S0 contains the key S1 and returns the result if found. Otherwise
2451 | KeysetIdx, DKeysetElem, S(Keyset) S(Int,Str) S(Cell), NF
2453 Checks if S0 contains the key S1 and returns the result if found. Otherwise
2456 | MethodExists, D(Bool), S(Cls) S(Str), NF
2458 Checks if the method named S1 exists on class S0. S0 must be a normal class
2459 that is not abstract.
2461 | LdBindAddr<SrcKey,spOff>, D(TCA), NA, NF
2463 Creates a service request to bind the given target address. Returns a TCA
2464 pointing either to the service request (before the service request is
2465 satisfied) or to the native code for the given target address (once the
2466 service request is satisfied).
2468 | LdSwitchDblIndex, D(Int), S(Dbl) S(Int) S(Int), NF
2470 | LdSwitchStrIndex, D(Int), S(Str) S(Int) S(Int), CRc
2472 | LdSwitchObjIndex, D(Int), S(Obj) S(Int) S(Int), CRc
2474 These instructions are used to determine the target of a switch statement
2475 with target range [S1:S1 + S2), when invoked with the value S0. They call
2476 helper functions to check whether S0 is an numeric integer in the range
2477 [S1:S1 + S2), and if so return the value S1 - (Int)S0. Else, they return the
2478 target of the default target, S2 + 1.
2480 | LdSSwitchDestFast, D(TCA), S(Gen), NF
2482 | LdSSwitchDestSlow, D(TCA), S(Gen), NF
2484 Load string switch destinations (two different compilation strategies).
2486 | InterpOne<T,spOff,bcOff,numPopped,numPushed>, ND,
2487 | S(StkPtr) S(FramePtr),
2490 Call the interpreter implementation function for one opcode. S0 + `spOff' (in
2491 cells) and S1 are, respectively, the VM stack and frame pointers before this
2492 instruction. T is only present if the instruction pushes to the stack, in
2493 which case it is the type of the top stack element after the call. `bcOff' is
2494 the bytecode offset. `numPopped' is the number of stack cells consumed by the
2495 instruction, and `numPushed' is the number of stack cells produced by the
2498 | InterpOneCF<T,bcOff,numPopped,numPushed>, ND,
2499 | S(StkPtr) S(FramePtr),
2502 Similar to InterpOne, but for instructions that may modify vmpc. This is
2503 implemented as a tail call to a stub, so any exceptions thrown will be thrown
2504 in the context of the stub, not the InterpOneCF instruction.
2506 | OODeclExists<kind>, D(Bool), S(Str) S(Bool), NF
2508 Returns a bool indicating whether the class, interface, or trait named by S0
2509 exists. Invokes autoload if S1 is true.
2511 | SetOpCell<op>, ND, S(LvalToCell) S(Cell), NF
2513 Performs S0 <op>= S1.
2515 | SetOpCellVerify<op>, ND, S(LvalToCell) S(Cell) S(Cls) S(Int), NF
2517 Similar to SetOpCell, but does a type-hint check of the result (before
2518 assigning to S0) using the type-hint of the property in class S2 at slot S3.
2520 | GetTime, D(Dbl), NA, NF
2522 Returns a double of the current time in seconds.
2524 | GetTimeNs, D(Int), C(Int), NF
2526 Returns the current time of the given clock id specified as clockid_t in
2527 nanoseconds as integer. This will call kernel's clock_gettime_ns() API. Note
2528 that this cannot be used for CLOCK_THREAD_CPUTIME_ID, as HHVM provides
2529 different semantics for that counter.
2531 | KillClsRefCls<slot>, ND, S(FramePtr), NF
2533 Mark the class-ref's cls slot `slot` in frame S0 as no longer containing a
2534 meaningful value. This is used to aid in memory analysis. In debugging
2535 builds, it may overwrite the slot with a poison value.
2537 | KillClsRefTS<slot>, ND, S(FramePtr), NF
2539 Mark the class-ref's reified generic slot `slot` in frame S0 as no longer
2540 containing a meaningful value. This is used to aid in memory analysis.
2541 In debugging builds, it may overwrite the slot with a poison value.
2543 15. Generators & Closures
2545 | LdClosureCtx, DCtx, S(Obj), NF
2547 Load the context from the closure object S0 into D.
2548 May only be used in S0's closure Func.
2550 | StClosureCtx, ND, S(Obj) S(Ctx,Nullptr), CRc
2552 Store the context represented by S1 into the closure object S0. S1 may be a
2553 Nullptr when there is no context (i.e. the closure is being used in a
2556 | StClosureArg<offsetBytes>, ND, S(Obj) S(Cell), CRc
2558 Store one of the closure environment arguments (i.e. from the closure's use
2559 clause) from S1 into the closure object S0.
2561 | CreateGen, DAllocObj, S(FramePtr) C(Int) S(TCA,Nullptr) C(Int), PRc
2563 Create a Generator object and suspend the ActRec provided by S0 into its
2564 embedded ActRec, allocating S1 slots for locals/iterators. Set the native
2565 resume address to S2 and resume offset to S3.
2567 | CreateAGen, DAllocObj, S(FramePtr) C(Int) S(TCA,Nullptr) C(Int), PRc
2569 Create an AsyncGenerator object and suspend the ActRec provided by S0 into its
2570 embedded ActRec, allocating S1 slots for locals/iterators. Set the native
2571 resume address to S2 and resume offset to S3.
2573 | CreateAFWH, DAllocObj,
2574 | S(FramePtr) C(Int) S(TCA,Nullptr) C(Int) S(Obj),
2577 Create an AsyncFunctionWaitHandle object and suspend the ActRec provided by
2578 S0 into its embedded ActRec, allocating S1 slots for locals/iterators. Set
2579 the native resume address to S2, resume offset to S3, and mark it blocked on
2580 non-finished child S4.
2582 | CreateAFWHNoVV, DAllocObj,
2583 | S(FramePtr) C(Int) S(TCA,Nullptr) C(Int) S(Obj),
2586 Create an AsyncFunctionWaitHandle object and suspend the ActRec provided by
2587 S0 into its embedded ActRec, allocating S1 slots for locals/iterators. Set
2588 the native resume address to S2, resume offset to S3, and mark it blocked on
2589 non-finished child S4. This version of the instruction guarantees that the
2592 | CreateAGWH, DAllocObj,
2593 | S(FramePtr) S(TCA,Nullptr) C(Int) S(Obj),
2596 Create an AsyncGeneratorWaitHandle object and link it to the AsyncGenerator
2597 associated with the ActRec provided by S0. Set the native resume address
2598 to S1, resume offset to S2, and mark it blocked on non-finished child S3.
2600 | CreateAAWH<local,count>, DAllocObj, S(FramePtr) S(Int), PRc
2602 Create an AwaitAllWaitHandle and add the count elements from frame contiguous
2603 frame locals beginning at local and extending count locals. S1 denotes the
2604 total number of non-completed waithandles. All locals must be subclasses of
2607 | CreateSSWH, DAllocObj, S(Cell), CRc|PRc
2609 Call c_StaticWaitHandle::CreateSucceeded.
2611 | AFWHPrepareChild, ND, S(FramePtr) S(Obj), NF
2613 Prepare unfinished WaitableWaitHandle object specified by S1 for getting
2614 awaited by an AsyncFunctionWaitHandle object specified by its ActRec
2617 Injects S1 into the currently running scheduler instance and performs
2618 cross-scheduler and intra-scheduler cycle detection. Throws if the
2619 dependency cannot be established.
2621 | StArResumeAddr<offset>, ND, S(FramePtr) S(TCA), NF
2623 Store the resume address S1 into the Resumable whose ActRec is given by S0,
2624 marking the offset to resume at as `offset'.
2626 | ContEnter<spOffset,callBCOffset>, DGenIter,
2627 | S(StkPtr) S(FramePtr) S(FramePtr) S(TCA),
2630 Enters a generator body. S0 + `spOffset' (in cells) is a pointer to the
2631 stack, S1 is the current frame pointer, S2 is the generator frame pointer
2632 embedded in the Generator object, and S3 is the address to jump to. The
2633 `callBCOffset' will be stored to the m_callOff field of the ActRec in
2636 | ContPreNext, ND, S(Obj) C(Bool), B
2638 Performs operations needed for the next() method of Generator object S0.
2639 If the generator is already running or finished, or it was not started yet
2640 and the S1 check-started flag is set, the branch B is taken. Otherwise,
2641 the generator is marked as running.
2643 | ContStartedCheck, ND, S(Obj), B
2645 Checks if the Generator object S0 has started, and if not branches to
2648 | ContValid, D(Bool), S(Obj), NF
2650 Return true if a generator is not done, false otherwise.
2652 | ContStarted, D(Bool), S(Obj), NF
2654 Return true if a generator has been run at least once, i.e. is not in the
2655 Created state, false otherwise.
2657 | ContArIncKey, ND, S(FramePtr), NF
2659 Special-case key update for generator, ActRec of which is S0, which
2660 increments the key of a generator if that generator's key is an Int.
2661 This will cause undefined behavior if the generator's key is not an Int.
2663 | ContArIncIdx, D(Int), S(FramePtr), NF
2665 Increment the internal index in the Generator in S0, and return the new index
2668 | ContArUpdateIdx, ND, S(FramePtr) S(Int), NF
2670 Updates the internal index of generator with S1 if necessary, i.e. if S1
2671 is larger than the index. S0 is the pointer to the embedded ActRec.
2673 | LdContActRec, D(FramePtr), S(Obj), NF
2675 Loads the Generator object's ActRec, given a pointer to the generator
2678 | LdContResumeAddr, D(TCA|Nullptr), S(Obj), NF
2680 Load the resume addr from the Generator in S0.
2682 | StContArState<state>, ND, S(FramePtr), NF
2684 Change the state of the Generator object which has frame pointer S0.
2686 | LdContArValue, DParam(Cell), S(FramePtr), PRc
2688 Loads 'value' from the Generator object ActRec of which is S0.
2690 | StContArValue, ND, S(FramePtr) S(Cell), CRc
2692 Stores 'value' into the Generator object ActRec of which is S0. S1 is the
2695 | LdContArKey, DParam(Cell), S(FramePtr), PRc
2697 Loads 'key' from the Generator object ActRec of which is S0.
2699 | StContArKey, ND, S(FramePtr) S(Gen), CRc
2701 Stores 'key' into the Generator object ActRec of which is S0. S1 is the
2704 | AFWHBlockOn, ND, S(FramePtr) S(Obj), CRc
2706 Establish dependency between parent AsyncFunctionWaitHandle object, whose
2707 ActRec is given by S0, and child WaitableWaitHandle object referenced by S1.
2709 | LdWHState, D(Int), S(Obj), NF
2711 Loads the state of the WaitHandle in S0, which is a value from the wait
2712 handle states in ext_asio.h. This instruction has undefined behavior if S0 is
2715 | LdWHResult, DParam(Gen), S(Obj), NF
2717 Loads the result of the WaitHandle in S0. This instruction has undefined
2718 behavior if S0 is not a WaitHandle, or if S0 is not finished.
2720 | LdWHNotDone, D(Int), S(Obj), NF
2722 Returns 1 if S0 is not finished, and 0 if S0 is finished.
2724 | CountWHNotDone<local,count>, D(Int), S(FramePtr), B
2726 Returns the number of unfinished awaitables contained in the contiguous
2727 locals beginning at local and extending count, skipping all nulls. A branch
2728 is taken if a non-Awaitable non-null value is encountered.
2730 | LdAFWHActRec, D(FramePtr), S(Obj), NF
2732 Loads the AsyncFunctionWaitHandle object's ActRec, given a pointer to the
2733 AsyncFunctionWaitHandle object in S0.
2736 16. Debugging, instrumentation, and profiling
2738 | IncStat, ND, C(Int), NF
2740 Increment stat counter. S0 is the implementation defined stat counter index.
2742 | IncProfCounter<TransID>, ND, NA, NF
2744 Increment the profiling counter associated with translation TransID.
2746 | DbgAssertRefCount<AssertReason>, ND, S(Gen,TCtx), NF
2748 Assert that S0 has a valid refcount. If S0 has a reference counted type and
2749 its count is implausible then execute a hardware trap instruction.
2751 | DbgTraceCall<spOffset>, ND, S(FramePtr) S(StkPtr), NF
2753 When EvalHHIRGenerateAsserts is on, this instruction is inserted at the
2754 start of each region, to emit some sanity checking code.
2756 | DbgAssertARFunc<offset>, ND, S(StkPtr) S(Func), NF
2758 Assert that S1 is the function in the ActRec given by s0+offset. If the
2759 assertion fails, execution is aborted via a hardware exception.
2761 | DbgAssertFunc, ND, S(FramePtr) S(Func), NF
2763 Assert that S1 is the current function in Frame S0. If the assertion fails,
2764 execution is aborted via a hardware exception.
2766 | RBTraceEntry, ND, NA, NF
2768 | RBTraceMsg, ND, NA, NF
2770 Ring buffer tracing.
2772 | ZeroErrorLevel, D(Int), NA, NF
2774 | RestoreErrorLevel, ND, S(Int), NF
2776 Helper instructions for fast implementation of the PHP error silencing
2782 | IterInit<IterData>, D(Bool), S(ArrLike,Obj) S(FramePtr), CRc
2784 | IterInitK<IterData>, D(Bool), S(ArrLike,Obj) S(FramePtr), CRc
2786 | LIterInit<IterData>, D(Bool), S(ArrLike) S(FramePtr), NF
2788 | LIterInitK<IterData>, D(Bool), S(ArrLike) S(FramePtr), NF
2790 <IterData> consists of three indices, iterId, keyId and valId. iterId is
2791 the index of the iterator variable, keyId and valId are indices of local
2794 Initializes the iterator variable whose index is given by iterId.
2795 This instruction creates the appropriate iterator for the array or object that
2796 S0 references, and rewinds the new iterator to its start. S0 points to the
2797 stack frame containing the iterator and local variables with the indices
2798 iterId, keyId and valId.
2800 If the new iterator is at its end (i.e., has no elements to iterate over),
2801 this instruction decrements the refcount of S0 and returns false; otheriwse,
2802 it stores a reference to S0 in the new iterator and returns true. If the
2803 iterator is not at its end, then this instruction stores the iterator's first
2804 value (and key) into the local variable with index valId (and keyId,
2807 The IterInit and IterInitK instructions always copy the array element by
2810 The LIter variations only accept arrays and do not take ownership of their
2811 base. Instead the base is provided on each operation on the iterator. This
2812 avoids having to raise the ref-count of the base (in situations where this is
2815 This instruction has the ConsumesRC property because it either decrements the
2816 reference count of S0 or stores a reference to S0 into the new iterator.
2818 | IterNext<IterData>, D(Bool), S(FramePtr), NF
2820 | IterNextK<IterData>, D(Bool), S(FramePtr), NF
2822 | LIterNext<IterData>, D(Bool), S(ArrLike) S(FramePtr), NF
2824 | LIterNextK<IterData>, D(Bool), S(ArrLike) S(FramePtr), NF
2826 <IterData> consists of three indices, iterId, keyId and valId. iterId is
2827 the index of the iterator variable, keyId and valId are indices of local
2828 variables. S0 points to the stack frame containing the iterator and local
2829 variables with the indices iterId, keyId and valId.
2831 Advances the iterator variable whose index is given by iterId.
2833 If the iterator has reached the end, this instruction frees the iterator
2834 variable and returns false; otherwise, it returns true. If the iterator has
2835 not reached its end, then this instruction stores the iterator's next value
2836 (and key) into the local variable with index valId (and keyId, respectively).
2838 The IterInit and IterInitK instructions always copy the array element by
2841 | IterFree, ND, S(FramePtr), NF
2843 Free the iterator variable whose index is given by S1 in the stack frame
2847 18. Member instruction support
2849 | LdMIStateAddr, D(PtrToMISGen), C(Int), NF
2851 Load an MInstrState address. Returns a pointer to offset S0 within the
2852 current MInstrState.
2854 | LdMBase, DParam(LvalToGen), NA, NF
2856 Load the current value of the member base register.
2858 | StMBase, ND, S(LvalToGen), NF
2860 Store a new value to the member base register. It is illegal for any
2861 instruction other than StMBase or InterpOne (when interpreting a member
2862 instruction) to modify the member base register.
2864 | LdMIPropStateAddr, D(MIPropSPtr), NA, NF
2866 Load an address to the current MInstrPropState.
2868 | StMIPropState, ND, S(Cls|Nullptr) S(Int) C(Bool), NF
2870 Write to the current MInstrPropState.
2872 | FinishMemberOp, ND, NA, NF
2874 Mark the end of a member operation. This has no effect at runtime but exists
2875 to provide information for certain optimizations.
2877 All of the remaining opcodes in this section are simple wrappers around helper
2878 functions (specified in S0) to perform the corresponding vector operation. If
2879 S1 is a ConstCls it represents the context class for the operation.
2881 SetElem, SetProp, and SetNewElem are used to implement part of the SetM hhbc
2882 opcode, which almost always pushes its first stack input or a StaticStr as its
2883 stack result. The combinations of input types that cause SetM to push anything
2884 other than those two values are vanishingly rare in correct PHP programs, so
2885 these three instructions have been optimized for the common cases. SetNewElem
2886 and SetProp have no destination, allowing the compiler to predict that the
2887 SetM's output will be the same as its input (and optimize accordingly). If that
2888 turns out to not be the case at runtime, the instruction will throw an
2889 InvalidSetMException. The exception will hold a Cell containing the value the
2890 SetM should push on the stack instead of its input value. The runtime is
2891 responsible for catching this exception, finishing execution of the SetM
2892 instruction, pushing the value from the exception on the stack, and proceeding
2893 as appropriate (most likely with a side exit to the next bytecode instruction,
2894 since it has pushed an unexpected type onto the stack).
2896 SetElem is similar to SetProp and SetNewElem but can also be used for setting
2897 characters within strings. When given a string base and a valid offset, SetElem
2898 returns a string representation of the newly inserted character. In all other
2899 cases it returns nullptr or throws an InvalidSetMException. It will throw this
2900 exception when it detects invalid input types, or when trying to set a string
2901 offset that would grow the string beyond the maximum supported size.
2903 The input types that will cause the errors described above are listed here:
2905 SetNewElem will fail if the base is not a subtype of {Null|Str|Arr|Obj} and not
2907 SetElem has the same base constraint as SetNewElem. In addition, the key must
2908 not be a subtype of {Arr|Obj}.
2909 SetProp will fail if the base is not a subtype of {Obj|Null}.
2911 Any instructions that take a pointer to an MInstrState struct use the various
2912 fields of that struct for holding intermediate values.
2914 | BaseG, D(LvalToRMembCell), S(Str), NF
2916 Get a base from global named S0.
2918 NB: BaseG returns either a PtrToGblGen, OR a pointer to a ref that is rooted
2919 in a GblGen. (I.e. the unbox happens in the C++ helper that this instruction
2920 calls.) If it is not a defining BaseG it can also return the
2921 init_null_variant, so for now it returns a PtrToRMembCell.
2923 | PropX, D(LvalToMembGen), S(Obj,LvalToGen) S(Cell) S(PtrToMISGen), NF
2925 Lookup intermediate property in S0, with key S1.
2927 | PropQ, D(LvalToMembGen), S(Obj,LvalToGen) S(StaticStr) S(PtrToMISGen), NF
2929 A nullsafe version of PropX, returns null if the base S0 is null.
2931 | PropDX, D(LvalToMembGen), S(Obj,LvalToGen) S(Cell) S(PtrToMISGen) S(MIPropSPtr,Nullptr), MProp
2933 Like PropX, but used for intermediate element lookups that may modify the
2936 | CGetProp, D(Cell), S(Obj,LvalToGen) S(Cell), PRc
2938 Get property with key S1 from S0.
2940 | CGetPropQ, D(Cell), S(Obj,LvalToGen) S(StaticStr), PRc
2942 A nullsafe version of CGetProp, returns null if the base S0 is null.
2944 | VGetProp, D(BoxedInitCell), S(Obj,LvalToGen) S(Cell) S(MIPropSPtr,Nullptr), MProp|PRc
2946 Get property with key S1 from base S0 as a reference.
2948 | SetProp, ND, S(Obj,LvalToGen) S(Cell) S(Cell) S(MIPropSPtr,Nullptr), MProp
2950 Set property with key S1 in S0 to S2.
2952 | UnsetProp, ND, S(Obj,LvalToGen) S(Cell), NF
2954 Unset an object property.
2956 | SetOpProp<op>, D(Cell),
2957 | S(Obj,LvalToGen) S(Cell) S(Cell) S(MIPropSPtr,Nullptr),
2960 Set op propery with key S1 in base S0, using S2 as the right hand side.
2962 | IncDecProp<op>, D(Cell),
2963 | S(Obj,LvalToGen) S(Cell) S(MIPropSPtr,Nullptr),
2966 Increment/decrement property with key S1 in base S0.
2968 | EmptyProp, D(Bool), S(Obj,LvalToGen) S(Cell), NF
2970 Returns true iff the property with key S1 in base S0 is empty.
2972 | IssetProp, D(Bool), S(Obj,LvalToGen) S(Cell), NF
2974 Returns true iff the property with key S1 in base S0 is set.
2976 | ElemX, D(LvalToMembGen), S(LvalToGen) S(Cell) S(PtrToMISGen), NF
2978 Get intermediate element with key S1 from base S0. The base will not be
2981 | ProfileMixedArrayOffset, ND, S(Arr) S(Int,Str), NF
2983 Profile the offset of the element keyed by S1 in S0.
2985 | CheckMixedArrayOffset<pos>, ND, S(AK(Mixed)) S(Int,Str), B
2987 Check that `pos' is within the usage bounds of S0 (including tombstones), and
2988 that S1 exactly matches the element key of S0 at `pos'. If any of the checks
2989 fail, branch to B. This check is allowed to have false negatives, in the
2990 case of int-like strings.
2992 | CheckArrayCOW, ND, S(ArrLike), B
2994 Check that S0 has a refcount of exactly 1; if not, branch to B.
2996 | ProfileDictOffset, ND, S(Dict) S(Int,Str), NF
2998 Profile the offset of the element keyed by S1 in S0.
3000 | CheckDictOffset<pos>, ND, S(Dict) S(Int,Str), B
3002 Check that `pos' is within the usage bounds of S0 (including tombstones), and
3003 that S1 exactly matches the element key of S0 at `pos'. If any of the checks
3004 fail, branch to B. This check is allowed to have false negatives.
3006 | ProfileKeysetOffset, ND, S(Keyset) S(Int,Str), NF
3008 Profile the offset of the element keyed by S1 in S0.
3010 | CheckKeysetOffset<pos>, ND, S(Keyset) S(Int,Str), B
3012 Check that `pos' is within the usage bounds of S0 (including tombstones), and
3013 that S1 exactly matches the element key of S0 at `pos'. If any of the checks
3014 fail, branch to B. This check is allowed to have false negatives.
3016 | ElemArrayX<M>, D(LvalToMembGen), S(Arr) S(Int,Str), NF
3018 | ElemArrayD<T>, D(LvalToElemGen), S(LvalToGen) S(Int,Str), MElem
3020 | ElemArrayU<T>, D(LvalToMembGen), S(LvalToGen) S(Int,Str), MElem
3022 Similar to ElemX, but the base S0 is an array and the key S1 is an int/str.
3023 ElemArrayD is for Define member instrs, ElemArrayU is for Unset, and
3024 ElemArrayX is for InOut, Warn, and None instrs (where the mode is M).
3026 ElemArray{D,U} both take a LvalToGen for the base operand, but expect it to be
3027 a LvalToArr or LvalToBoxedArr. T is the type of the base array.
3029 | ElemMixedArrayK<pos>, D(LvalToElemGen), S(AK(Mixed)) S(Int,Str), NF
3031 Like ElemArray, but the element for S1 is at a known position `pos' in S0.
3033 | ElemVecD<T>, D(LvalToElemCell), S(LvalToGen) S(Int), MElem
3035 | ElemVecU<T>, D(LvalToMembCell), S(LvalToGen) S(Int), MElem
3037 Similar to ElemX, but the base S0 is a vec and the key S1 is an int. ElemVecD
3038 is for Define member instrs and ElemVecU is for Unset. (Other variations can
3039 be implemented without special IR instructions).
3041 ElemVec{D,U} both take a LvalToGen for the base operand, but expect it to be a
3042 LvalToVec or LvalToBoxedVec. T is the type of the base vec.
3044 | ElemDictX<M>, D(LvalToMembCell), S(Dict) S(Int,Str), NF
3046 | ElemDictD<T>, D(LvalToElemCell), S(LvalToGen) S(Int,Str), MElem
3048 | ElemDictU<T>, D(LvalToMembCell), S(LvalToGen) S(Int,Str), MElem
3050 Similar to ElemX, but the base S0 is a dict and the key S1 is an int/str.
3051 ElemDictD is for Define member instrs, ElemDictU is for Unset, and
3052 ElemDictX is for InOut, Warn, and None instrs (where the mode is M).
3054 ElemDict{D,U} both take a LvalToGen for the base operand, but expect it to be
3055 a LvalToDict or LvalToBoxedDict. T is the type of the base array.
3057 | ElemDictK<pos>, D(LvalToElemCell), S(Dict) S(Int,Str), NF
3059 Like ElemDict, but the element for S1 is at a known position `pos' in S0.
3061 | ElemKeysetX<M>, D(LvalToMembCell), S(Keyset) S(Int,Str), NF
3063 | ElemKeysetU<T>, D(LvalToMembCell), S(LvalToGen) S(Int,Str), MElem
3065 Similar to ElemX, but the base S0 is a keyset and the key S1 is an int/str.
3066 ElemKeysetU is for Unset instrs and ElemKeysetX is for InOut, Warn and None
3067 instrs (where the mode is M).
3069 ElemKeysetU both take a LvalToGen for the base operand, but expect it to be
3070 a LvalToKeyset or LvalToBoxedKeyset. T is the type of the base array.
3072 | ElemKeysetK<pos>, D(LvalToElemCell), S(Keyset) S(Int,Str), NF
3074 Like ElemKeyset, but the element for S1 is at a known position `pos' in S0.
3076 | ElemDX, D(LvalToMembGen), S(LvalToGen) S(Cell) S(PtrToMISGen) S(MIPropSPtr,Nullptr), MElem
3078 Like ElemX, but used for intermediate element lookups that may modify the
3081 | ElemUX, D(LvalToMembGen), S(LvalToGen) S(Cell) S(PtrToMISGen), MElem
3083 Like ElemX, but used for intermediate element lookups that may modify the
3084 base as part of an unset operation.
3086 | ArrayGet, DArrElem, S(Arr) S(Int,Str), NF
3088 Get element with key S1 from base S0.
3090 | MixedArrayGetK<pos>, DArrElem, S(AK(Mixed)) S(Int,Str), NF
3092 Like ArrayGet, but the element for S1 is at a known position `pos' in S0.
3094 | DictGet, DDictElem, S(Dict) S(Int,Str), NF
3096 Get element with key S1 from base S0, throwing if the element is not present.
3098 | DictGetQuiet, DDictElem, S(Dict) S(Int,Str), NF
3100 Get element with key S1 from base S0, returning null if the element is not
3103 | DictGetK<pos>, DDictElem, S(Dict) S(Int,Str), NF
3105 Like DictGet, but the element for S1 is at a known position `pos' in S0.
3107 | KeysetGet, DKeysetElem, S(Keyset) S(Int,Str), NF
3109 Get element with key S1 from base S0, throwing if the element is not present.
3111 | KeysetGetQuiet, DKeysetElem, S(Keyset) S(Int,Str), NF
3113 Get element with key S1 from base S0, returning null if the element is not
3116 | KeysetGetK<pos>, DKeysetElem, S(Keyset) S(Int,Str), NF
3118 Like KeysetGet, but the element for S1 is at a known position `pos' in S0.
3120 | StringGet, D(StaticStr), S(Str) S(Int), PRc
3122 Get string representing character at position S1 from base string S0. Raises
3123 a notice if the position is out of bounds.
3125 | MapGet, D(Cell), S(Obj) S(Int,Str), PRc
3127 Get element with key S1 from base S0.
3129 | CGetElem, D(Cell), S(LvalToGen) S(Cell), PRc
3131 Get element with key S1 from S0.
3133 | MemoGetStaticValue<func,T>, DParam(InitCell), NA, B
3135 Get the memo value associated with the static function "func". If the value
3136 is not present, branch. The returned value is not inc-reffed. This op can
3137 only be used inside a memoize wrapper.
3139 | MemoGetStaticCache<func,keys,T>, DParam(InitCell), S(FramePtr,StkPtr), B
3141 Perform a lookup on the memo cache associated with the static function
3142 "func". The keys for the lookup are read from the locals on the frame pointed
3143 to by S0 (which must be ints or strings). If the lookup fails, branch. The
3144 returned value is not inc-reffed. This op can only be used inside a memoize
3147 | MemoGetLSBValue<func,T>, DParam(InitCell), S(Cls), B
3149 Get the memo value associated with the static function "func" and late static
3150 bound class S0. If the value is not present, branch. The returned value is not
3151 inc-reffed. This op can only be used inside a memoize wrapper.
3153 | MemoGetLSBCache<func,keys,T>, DParam(InitCell), S(FramePtr,StkPtr) S(Cls), B
3155 Perform a lookup on the memo cache associated with the static function
3156 "func" and late static bound class S1. The keys for the lookup are read from
3157 the locals on the frame pointed to by S0 (which must be ints or strings). If
3158 the lookup fails, branch. The returned value is not inc-reffed. This op can
3159 only be used inside a memoize wrapper.
3161 | MemoGetInstanceValue<slot,func,T>, DParam(InitCell), S(Obj), B
3163 Get the memo value at the specified memo slot on S0. If the value is not
3164 present, branch. The returned value is not inc-reffed. This op can only be
3165 used inside a memoize wrapper.
3167 | MemoGetInstanceCache<func,keys,T>, DParam(InitCell), S(FramePtr,StkPtr) S(Obj), B
3169 Perform a lookup on the memo cache at the specified memo slot on S1. The keys
3170 for the lookup are read from the locals on the frame pointed to by S0 (which
3171 must be ints or strings). If the lookup fails, branch. The returned value is
3172 not inc-reffed. This op can only be used inside a memoize wrapper.
3174 | MemoSetStaticValue<func>, ND, S(InitCell), NF
3176 Set S0 as the memo value associated with the static function "func". Store
3177 the value, overwriting any previous value, with appropriate ref-count
3178 manipulations. This op can only be used inside a memoize wrapper.
3180 | MemoSetStaticCache<func,keys>, ND, S(FramePtr,StkPtr) S(InitCell), NF
3182 Store S1 in the memo cache associated with the static function "func". The
3183 keys for the lookup are read from the locals on the frame pointed to be S0
3184 (which must be ints or strings). Store the value, overwriting any previous
3185 value, with appropriate ref-count manipulations. This op can only be used
3186 inside a memoize wrapper.
3188 | MemoSetLSBValue<func>, ND, S(InitCell) S(Cls), NF
3190 Set S0 as the memo value associated with the static function "func" and
3191 late static bound class S1. Store the value, overwriting any previous
3192 value, with appropriate ref-count manipulations. This op can only be used
3193 inside a memoize wrapper.
3195 | MemoSetLSBCache<func,keys>, ND, S(FramePtr,StkPtr) S(Cls) S(InitCell), NF
3197 Store S2 in the memo cache associated with the static function "func" and
3198 late static bound class S1. The keys for the lookup are read from the
3199 locals on the frame pointed to be S0 (which must be ints or strings).
3200 Store the value, overwriting any previous value, with appropriate
3201 ref-count manipulations. This op can only be used inside a memoize wrapper.
3203 | MemoSetInstanceValue<slot,func>, ND, S(Obj) S(InitCell), NF
3205 Set S2 as the memo value at the specified memo slot on S1. Store the value,
3206 overwriting any previous value, with appropriate ref-count
3207 manipulations. This op can only be used inside a memoize wrapper.
3209 | MemoSetInstanceCache<slot,func,keys>, ND, S(FramePtr,StkPtr) S(Obj) S(InitCell), NF
3211 Store S2 in the memo cache at the specified memo slot on S1. Store the value,
3212 overwriting any previous value, with appropriate ref-count
3213 manipulations. This op can only be used inside a memoize wrapper.
3215 | InitObjMemoSlots<class>, ND, S(Obj), NF
3217 Initialize the memoization instance slots for object S0 of the given class.
3219 | ArraySet, D(Arr), S(Arr) S(Int,Str) S(Cell), PRc|CRc
3221 Set element with key S1 in S0 to S2. The dest will be a new Array that should
3224 | ArraySetRef, ND, S(Arr) S(Int,Str) S(Cell) S(BoxedCell), CRc
3226 Like ArraySet, but for binding operations on the array. S3 must point to a
3227 RefData with an array type when this instruction is executed, and it must be
3228 the same array that is in S0.
3230 | VecSet, D(Vec), S(Vec) S(Int) S(Cell), PRc|CRc
3232 Set element with key S1 in S0 to S2. The dest will be a new Vec that should
3235 | VecSetRef, ND, S(Vec) S(Int) S(Cell) S(BoxedCell), CRc
3237 Like VecSet, but for binding operations on the vec. S3 must point to a
3238 RefData with a vec type when this instruction is executed, and it must be the
3239 same vec that is in S0.
3241 | DictSet, D(Dict), S(Dict) S(Int,Str) S(Cell), PRc|CRc
3243 Set element with key S1 in S0 to S2. The dest will be a new Dict that should
3246 | DictSetRef, ND, S(Dict) S(Int,Str) S(Cell) S(BoxedCell), CRc
3248 Like DictSet, but for binding operations on the dict. S3 must point to a
3249 RefData with a vec type when this instruction is executed, and it must be the
3250 same dict that is in S0.
3252 | MapSet, ND, S(Obj) S(Int,Str) S(Cell), NF
3254 Set element with key S1 in S0 to S2.
3256 | VectorSet, ND, S(Obj) S(Int,Str) S(Cell), NF
3258 Set element with key S1 in S0 to S2.
3260 | SetElem, DSetElem, S(LvalToGen) S(Cell) S(Cell) S(MIPropSPtr,Nullptr), MElem
3262 Set element with key S1 in S0 to S2. SetElem returns a Nullptr in the common
3263 case, where the logical result of the hhbc SetM is its right hand side. In
3264 the case of string bases, the SetM returns a new string containing the newly
3265 inserted character. So the return value of this instruction is Nullptr unless
3266 SetM needed to return a static string.
3268 Furthermore, in the case of "invalid offsets", SetElem may throw an
3269 InvalidSetMException (see discussion above).
3271 | SetRange, ND, S(LvalToGen) S(Int) S(Cell) S(Int) S(Int), MElem
3273 | SetRangeRev, ND, S(LvalToGen) S(Int) S(Cell) S(Int) S(Int), MElem
3275 Perform a range set or reverse range set operation, with the same arguments
3276 and semantics as the RangeSet bytecode instruction.
3278 | UnsetElem, ND, S(LvalToGen) S(Cell), MElem
3280 Unsets the element at key S1 in the base S0.
3282 | SetOpElem<op>, D(Cell),
3283 | S(LvalToGen) S(Cell) S(Cell) S(MIPropSPtr,Nullptr),
3286 Set op elem with key S1 in base S0, using S2 as the right hand side.
3288 | IncDecElem, D(Cell), S(LvalToGen) S(Cell) S(MIPropSPtr,Nullptr), MElem|PRc
3290 Increment/decrement element with key S1 in base S0.
3292 | SetNewElem, ND, S(LvalToGen) S(Cell) S(MIPropSPtr,Nullptr), MElem
3294 Append the value in S1 to S0.
3296 | SetNewElemArray, ND, S(LvalToGen) S(Cell), MElem
3298 Append the value in S1 to S0, where S0 must be a pointer to a array.
3300 | SetNewElemVec, ND, S(LvalToGen) S(Cell), MElem
3302 Append the value in S1 to S0, where S0 must be a pointer to a vec.
3304 | SetNewElemKeyset, ND, S(LvalToGen) S(Int,Str), MElem
3306 Append the value in S1 to S0, where S0 must be a pointer to a keyset.
3308 | ArrayIsset, D(Bool), S(Arr) S(Int,Str), NF
3310 Returns true iff the element at key S1 in the base S0 is set.
3312 | DictIsset, D(Bool), S(Dict) S(Int,Str), NF
3314 Returns true iff the element at key S1 in the base S0 is set.
3316 | KeysetIsset, D(Bool), S(Keyset) S(Int,Str), NF
3318 Returns true iff the element at key S1 in the base S0 is set.
3320 | StringIsset, D(Bool), S(Str) S(Int), NF
3322 Returns true iff the string S0 has a character at position S1.
3324 | VectorIsset, D(Bool), S(Obj) S(Int), NF
3326 Returns true iff the element at key S1 in the base S0 is set.
3328 | PairIsset, D(Bool), S(Obj) S(Int), NF
3330 Returns true iff the element at key S1 in the base S0 is set.
3332 | MapIsset, D(Bool), S(Obj) S(Int,Str), NF
3334 Returns true iff the element at key S1 in the base S0 is set.
3336 | IssetElem, D(Bool), S(LvalToGen) S(Cell), NF
3338 Returns true iff the element at key S1 in S0 is set.
3340 | EmptyElem, D(Bool), S(LvalToGen) S(Cell), NF
3342 Returns true iff the element at key S1 in S0 is set and not equal (as defined
3343 by the hhbc Eq instruction) to false.
3345 | DictEmptyElem, D(Bool), S(Dict) S(Int,Str), NF
3347 Like EmptyElem, but specialized for dicts.
3349 | KeysetEmptyElem, D(Bool), S(Keyset) S(Int,Str), NF
3351 Like EmptyElem, but specialized for dicts.
3353 | CheckRange, D(Bool), S(Int) S(Int), NF
3355 Returns true iff S0 is in the range [0, S1).
3357 | ThrowOutOfBounds, ND, S(ArrLike|Obj) S(Gen), T
3359 Throws an OutOfBoundsException corresponding to an access of S0 with the key
3362 | ThrowInvalidArrayKey, ND, S(ArrLike) S(Gen), T
3364 Throws an InvalidArgumentException corresponding to an access of S0 with the
3365 key S1, which has a type invalid for that array.
3367 | ThrowInvalidOperation, ND, S(Str), T
3369 Throws an InvalidOperationException with a message indicating S0.
3371 | ThrowArithmeticError, ND, S(Str), T
3373 Throws an ArithmeticError with a message indicating S0.
3375 | ThrowDivisionByZeroError, ND, S(Str), T
3377 Throws a DivisionByZeroError with a message indicating S0.
3379 | ThrowDivisionByZeroException, ND, NA, T
3381 Throws a DivisionByZeroException.
3383 | ThrowLateInitPropError, ND, S(Cls) S(Str) S(Bool), T
3385 Throws an InvalidOperationException indicating an access of a unset LateInit
3386 property. S0 is the class the property was declared on. S1 is the property
3387 name. S2 is true if its a static property, false otherwise.
3389 | ProfileArrayKind, ND, S(Arr), NF
3391 Profile the array kind of S0.
3393 | ProfileType, ND, S(Gen), NF
3395 Profile the type of S0.
3397 | ProfileMethod<rdsHandle,spOff>, ND, S(StkPtr) S(Cls,Nullptr), NF
3399 Profile the Func in the ActRec that was just pushed onto the stack.
3401 | ProfileFunc<rdsHandle,spOff>, ND, S(StkPtr), NF
3403 Profile the Func in the ActRec that was just pushed onto the stack.
3405 | CheckPackedArrayDataBounds, ND, S(AK(Packed),Vec) S(Int), B
3407 Checks that the index in S1 is within the bounds of the packed array or
3408 vector array in S0. Branches to B if the index is out of bounds.
3410 | LdPackedArrayDataElemAddr<T>, DParam(LvalToElemGen), S(AK(Packed),Vec) S(Int), NF
3412 Loads the address of the element at index S1 of the packed array or vec array
3413 in S0. This instruction assumes the array actually contains an element at
3414 that offset (IE, the array has the proper length).
3416 | ReservePackedArrayDataNewElem, D(Int), S(AK(Packed),Vec), B
3418 If there is room in the packed or vec array (which is assumed to be mutable),
3419 increments the array size and returns the index of the new last element
3420 (which you must initialize); else jumps to the taken branch.
3422 | LdPackedElem, DArrElem, S(AK(Packed)) S(Int), NF
3424 Loads the element of the packed array in S0 at offset S1. This instruction
3425 assumes that the vec actually contains an element at that offset (IE, the
3426 array has the proper length).
3428 | LdVecElem, DVecElem, S(Vec) S(Int), NF
3430 Loads the element of the vec array in S0 at offset S1. This instruction
3431 assumes that the vec actually contains an element at that offset (IE, the vec
3432 has the proper length).
3434 | LdVectorSize, D(Int), S(Obj), NF
3436 Returns the size of the given Vector collection in S0.
3438 | ColIsEmpty, D(Bool), S(Obj), NF
3440 | ColIsNEmpty, D(Bool), S(Obj), NF
3442 Returns whether a collection instance is empty or not. S0 must be known to
3443 be an instance of a collection class at compile time.
3446 | VecFirst, DVecFirstElem, S(Vec,AK(Packed)), NF
3448 Returns the first value from the packed or vec array in S0.
3449 If the array is empty, it will return NULL.
3451 | VecLast, DVecLastElem, S(Vec,AK(Packed)), NF
3453 Returns the last value from the packed or vec array in S0.
3454 If the array is empty, it will return NULL.
3456 | DictFirst, DDictFirstElem, S(Dict,AK(Mixed)), NF
3458 Returns the first value from the mixed or dict array in S0.
3459 If the array is empty, it will return NULL.
3461 | DictLast, DDictLastElem, S(Dict,AK(Mixed)), NF
3463 Returns the last value from the mixed or dict array in S0.
3464 If the array is empty, it will return NULL.
3466 | DictFirstKey, DDictFirstKey, S(Dict,AK(Mixed)), NF
3468 Returns the first key from the mixed or dict array in S0.
3469 If the array is empty, it will return NULL.
3471 | DictLastKey, DDictLastKey, S(Dict,AK(Mixed)), NF
3473 Returns the last key from the mixed or dict array in S0.
3474 If the array is empty, it will return NULL.
3476 | KeysetFirst, DKeysetFirstElem, S(Keyset), NF
3478 Returns the first value(key) from the keyset in S0.
3479 If the array is empty, it will return NULL.
3481 | KeysetLast, DKeysetLastElem, S(Keyset), NF
3483 Returns the first value(key) from the keyset in S0.
3484 If the array is empty, it will return NULL.
3487 19. Exception/unwinding support
3489 | BeginCatch, ND, NA, NF
3491 Marks the beginning of a catch region. Exact behavior is implementation and
3492 architecture specific.
3494 | EndCatch<spOffset>, ND, S(FramePtr) S(StkPtr), T
3496 Marks the end of a catch region and returns control to the unwinder. The
3497 `spOffset' field represents a logical adjustment to S1 (in cells) to yield
3498 the vm stack pointer, however the stack pointer is not actually adjusted
3499 before this instruction returns control to the unwinder. The unwinder
3500 instead relies on fixup map information to find the appropriate stack
3501 pointers. Instead it's part of this instruction to facilitate assertions and
3502 memory effect analysis.
3504 | UnwindCheckSideExit, ND, S(FramePtr) S(StkPtr), B
3506 Branches to B if the currently executing catch region should return control
3507 to the unwinder rather than side exiting. Used to control behavior in catch
3508 traces for the InvalidSetMException and TVCoercionException situations.
3510 | LdUnwinderValue<T>, DParam(Cell), NA, PRc
3512 Loads the value contained by the current unwinder exception.
3515 20. Function prologues
3517 | EnterFrame, ND, S(FramePtr), NF
3519 Stash the return address of the call in m_savedRip.
3521 | CheckStackOverflow, ND, S(FramePtr), NF
3523 Check if the stack depth has exceeded its limit. If it has, jump to the
3524 stack overflow helper stub, which will throw.
3526 | InitExtraArgs<func,argc>, ND, S(FramePtr), NF
3528 Set up the ExtraArgs struct on the live ActRec. If extra args are present
3529 and need to be discarded, they will be decref'd and may re-enter to run
3532 | InitCtx, ND, S(FramePtr) S(Ctx,Nullptr), CRc
3534 Store S1 to the m_this/m_cls field in the frame pointer S0.
3536 If InitCtx appears in an IR unit, it must dominate all occurrences of LdCtx
3537 and LdCctx with the same FramePtr.
3539 | CheckSurpriseFlagsEnter<func,argc>, ND, S(FramePtr), NF
3541 Test the implementation-specific surprise flags. If they're nonzero, call
3542 the function enter helper.
3544 | CheckSurpriseAndStack<func,args>, ND, S(FramePtr), NF
3546 Test surprise flags and stack overflow at the same time.
3548 | CheckARMagicFlag, ND, S(FramePtr), B
3550 If the MagicDispatch flags on the ActRec pointed to by the frame pointer S0
3551 are not set, branch to block B.
3553 | LdARNumArgsAndFlags, D(Int), S(FramePtr), NF
3555 Load the value of m_numArgsAndFlags on the ActRec pointed to by the frame
3558 | StARNumArgsAndFlags, ND, S(FramePtr) S(Int), NF
3560 Store S1 to m_numArgsAndFlags on the ActRec pointed to by the frame pointer
3563 | LdARInvName, D(Str), S(FramePtr), NF
3565 Load the value of m_invName off the ActRec pointed to by the frame pointer S0.
3566 The compiler should generate this only if it knows that m_invName is a
3567 StringData* (rather than, e.g., a VarEnv*).
3569 | StARInvName, ND, S(FramePtr) S(Str,Nullptr), CRc
3571 Store S1 to m_invName on the ActRec pointed to by the frame pointer S0.
3573 | PackMagicArgs, DVArr, S(FramePtr), PRc
3575 Call PackedArray::MakeVArray() with the value of numArgs() on the ActRec
3576 pointed to by the frame pointer S0 as the first argument, and the pointer to
3577 the first parameter in the frame as the second argument.
3579 | LdTVAux<ValidBits>, D(Int), S(Gen), NF
3581 Load the value of m_aux from the TypedValue S0. ValidBits is a mask
3582 specifying which bits are allowed to be set. The runtime may ignore it.
3584 Note that when we pass TypedValues around in registers, we usually use a byte
3585 register for the m_type member, and thus ignore m_aux. LdTVAux is only valid
3586 when we know that S0's m_type and m_aux were both materialized into the same
3589 | LdARReifiedGenerics, DVArr, S(FramePtr), NF
3591 Load the value of m_reifiedGenerics on the ActRec pointed to by the frame
3594 | KillARReifiedGenerics, ND, S(FramePtr), NF
3596 Mark the ActRec's m_reifiedGenerics pointer in frame S0 as no longer
3597 containing a meaningful value. This can used to aid in memory analysis.
3598 In debugging builds, it may overwrite the pointer with a poison value.
3600 /* Local Variables: */
3601 /* fill-column: 79 */