2 * Copyright 2011 Leiden University. All rights reserved.
3 * Copyright 2012-2014 Ecole Normale Superieure. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY LEIDEN UNIVERSITY ''AS IS'' AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL LEIDEN UNIVERSITY OR
21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
24 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * The views and conclusions contained in the software and documentation
30 * are those of the authors and should not be interpreted as
31 * representing official policies, either expressed or implied, of
39 #include <llvm/Support/raw_ostream.h>
40 #include <clang/AST/ASTContext.h>
41 #include <clang/AST/ASTDiagnostic.h>
42 #include <clang/AST/Attr.h>
43 #include <clang/AST/Expr.h>
44 #include <clang/AST/RecursiveASTVisitor.h>
47 #include <isl/space.h>
60 #include "scop_plus.h"
62 #include "tree2scop.h"
67 using namespace clang
;
69 static enum pet_op_type
UnaryOperatorKind2pet_op_type(UnaryOperatorKind kind
)
79 return pet_op_post_inc
;
81 return pet_op_post_dec
;
83 return pet_op_pre_inc
;
85 return pet_op_pre_dec
;
91 static enum pet_op_type
BinaryOperatorKind2pet_op_type(BinaryOperatorKind kind
)
95 return pet_op_add_assign
;
97 return pet_op_sub_assign
;
99 return pet_op_mul_assign
;
101 return pet_op_div_assign
;
103 return pet_op_assign
;
145 #if defined(DECLREFEXPR_CREATE_REQUIRES_BOOL)
146 static DeclRefExpr
*create_DeclRefExpr(VarDecl
*var
)
148 return DeclRefExpr::Create(var
->getASTContext(), var
->getQualifierLoc(),
149 SourceLocation(), var
, false, var
->getInnerLocStart(),
150 var
->getType(), VK_LValue
);
152 #elif defined(DECLREFEXPR_CREATE_REQUIRES_SOURCELOCATION)
153 static DeclRefExpr
*create_DeclRefExpr(VarDecl
*var
)
155 return DeclRefExpr::Create(var
->getASTContext(), var
->getQualifierLoc(),
156 SourceLocation(), var
, var
->getInnerLocStart(), var
->getType(),
160 static DeclRefExpr
*create_DeclRefExpr(VarDecl
*var
)
162 return DeclRefExpr::Create(var
->getASTContext(), var
->getQualifierLoc(),
163 var
, var
->getInnerLocStart(), var
->getType(), VK_LValue
);
167 /* Check if the element type corresponding to the given array type
168 * has a const qualifier.
170 static bool const_base(QualType qt
)
172 const Type
*type
= qt
.getTypePtr();
174 if (type
->isPointerType())
175 return const_base(type
->getPointeeType());
176 if (type
->isArrayType()) {
177 const ArrayType
*atype
;
178 type
= type
->getCanonicalTypeInternal().getTypePtr();
179 atype
= cast
<ArrayType
>(type
);
180 return const_base(atype
->getElementType());
183 return qt
.isConstQualified();
186 /* Create an isl_id that refers to the named declarator "decl".
188 static __isl_give isl_id
*create_decl_id(isl_ctx
*ctx
, NamedDecl
*decl
)
190 return isl_id_alloc(ctx
, decl
->getName().str().c_str(), decl
);
195 std::map
<const Type
*, pet_expr
*>::iterator it
;
196 std::map
<FunctionDecl
*, pet_function_summary
*>::iterator it_s
;
198 for (it
= type_size
.begin(); it
!= type_size
.end(); ++it
)
199 pet_expr_free(it
->second
);
200 for (it_s
= summary_cache
.begin(); it_s
!= summary_cache
.end(); ++it_s
)
201 pet_function_summary_free(it_s
->second
);
203 isl_union_map_free(value_bounds
);
206 /* Report a diagnostic, unless autodetect is set.
208 void PetScan::report(Stmt
*stmt
, unsigned id
)
210 if (options
->autodetect
)
213 SourceLocation loc
= stmt
->getLocStart();
214 DiagnosticsEngine
&diag
= PP
.getDiagnostics();
215 DiagnosticBuilder B
= diag
.Report(loc
, id
) << stmt
->getSourceRange();
218 /* Called if we found something we (currently) cannot handle.
219 * We'll provide more informative warnings later.
221 * We only actually complain if autodetect is false.
223 void PetScan::unsupported(Stmt
*stmt
)
225 DiagnosticsEngine
&diag
= PP
.getDiagnostics();
226 unsigned id
= diag
.getCustomDiagID(DiagnosticsEngine::Warning
,
231 /* Report a missing prototype, unless autodetect is set.
233 void PetScan::report_prototype_required(Stmt
*stmt
)
235 DiagnosticsEngine
&diag
= PP
.getDiagnostics();
236 unsigned id
= diag
.getCustomDiagID(DiagnosticsEngine::Warning
,
237 "prototype required");
241 /* Report a missing increment, unless autodetect is set.
243 void PetScan::report_missing_increment(Stmt
*stmt
)
245 DiagnosticsEngine
&diag
= PP
.getDiagnostics();
246 unsigned id
= diag
.getCustomDiagID(DiagnosticsEngine::Warning
,
247 "missing increment");
251 /* Report a missing summary function, unless autodetect is set.
253 void PetScan::report_missing_summary_function(Stmt
*stmt
)
255 DiagnosticsEngine
&diag
= PP
.getDiagnostics();
256 unsigned id
= diag
.getCustomDiagID(DiagnosticsEngine::Warning
,
257 "missing summary function");
261 /* Report a missing summary function body, unless autodetect is set.
263 void PetScan::report_missing_summary_function_body(Stmt
*stmt
)
265 DiagnosticsEngine
&diag
= PP
.getDiagnostics();
266 unsigned id
= diag
.getCustomDiagID(DiagnosticsEngine::Warning
,
267 "missing summary function body");
271 /* Extract an integer from "val", which is assumed to be non-negative.
273 static __isl_give isl_val
*extract_unsigned(isl_ctx
*ctx
,
274 const llvm::APInt
&val
)
277 const uint64_t *data
;
279 data
= val
.getRawData();
280 n
= val
.getNumWords();
281 return isl_val_int_from_chunks(ctx
, n
, sizeof(uint64_t), data
);
284 /* Extract an integer from "val". If "is_signed" is set, then "val"
285 * is signed. Otherwise it it unsigned.
287 static __isl_give isl_val
*extract_int(isl_ctx
*ctx
, bool is_signed
,
290 int is_negative
= is_signed
&& val
.isNegative();
296 v
= extract_unsigned(ctx
, val
);
303 /* Extract an integer from "expr".
305 __isl_give isl_val
*PetScan::extract_int(isl_ctx
*ctx
, IntegerLiteral
*expr
)
307 const Type
*type
= expr
->getType().getTypePtr();
308 bool is_signed
= type
->hasSignedIntegerRepresentation();
310 return ::extract_int(ctx
, is_signed
, expr
->getValue());
313 /* Extract an integer from "expr".
314 * Return NULL if "expr" does not (obviously) represent an integer.
316 __isl_give isl_val
*PetScan::extract_int(clang::ParenExpr
*expr
)
318 return extract_int(expr
->getSubExpr());
321 /* Extract an integer from "expr".
322 * Return NULL if "expr" does not (obviously) represent an integer.
324 __isl_give isl_val
*PetScan::extract_int(clang::Expr
*expr
)
326 if (expr
->getStmtClass() == Stmt::IntegerLiteralClass
)
327 return extract_int(ctx
, cast
<IntegerLiteral
>(expr
));
328 if (expr
->getStmtClass() == Stmt::ParenExprClass
)
329 return extract_int(cast
<ParenExpr
>(expr
));
335 /* Extract a pet_expr from the APInt "val", which is assumed
336 * to be non-negative.
338 __isl_give pet_expr
*PetScan::extract_expr(const llvm::APInt
&val
)
340 return pet_expr_new_int(extract_unsigned(ctx
, val
));
343 /* Return the number of bits needed to represent the type "qt",
344 * if it is an integer type. Otherwise return 0.
345 * If qt is signed then return the opposite of the number of bits.
347 static int get_type_size(QualType qt
, ASTContext
&ast_context
)
351 if (!qt
->isIntegerType())
354 size
= ast_context
.getIntWidth(qt
);
355 if (!qt
->isUnsignedIntegerType())
361 /* Return the number of bits needed to represent the type of "decl",
362 * if it is an integer type. Otherwise return 0.
363 * If qt is signed then return the opposite of the number of bits.
365 static int get_type_size(ValueDecl
*decl
)
367 return get_type_size(decl
->getType(), decl
->getASTContext());
370 /* Bound parameter "pos" of "set" to the possible values of "decl".
372 static __isl_give isl_set
*set_parameter_bounds(__isl_take isl_set
*set
,
373 unsigned pos
, ValueDecl
*decl
)
379 ctx
= isl_set_get_ctx(set
);
380 type_size
= get_type_size(decl
);
382 isl_die(ctx
, isl_error_invalid
, "not an integer type",
383 return isl_set_free(set
));
385 set
= isl_set_lower_bound_si(set
, isl_dim_param
, pos
, 0);
386 bound
= isl_val_int_from_ui(ctx
, type_size
);
387 bound
= isl_val_2exp(bound
);
388 bound
= isl_val_sub_ui(bound
, 1);
389 set
= isl_set_upper_bound_val(set
, isl_dim_param
, pos
, bound
);
391 bound
= isl_val_int_from_ui(ctx
, -type_size
- 1);
392 bound
= isl_val_2exp(bound
);
393 bound
= isl_val_sub_ui(bound
, 1);
394 set
= isl_set_upper_bound_val(set
, isl_dim_param
, pos
,
395 isl_val_copy(bound
));
396 bound
= isl_val_neg(bound
);
397 bound
= isl_val_sub_ui(bound
, 1);
398 set
= isl_set_lower_bound_val(set
, isl_dim_param
, pos
, bound
);
404 __isl_give pet_expr
*PetScan::extract_index_expr(ImplicitCastExpr
*expr
)
406 return extract_index_expr(expr
->getSubExpr());
409 /* Return the depth of an array of the given type.
411 static int array_depth(const Type
*type
)
413 if (type
->isPointerType())
414 return 1 + array_depth(type
->getPointeeType().getTypePtr());
415 if (type
->isArrayType()) {
416 const ArrayType
*atype
;
417 type
= type
->getCanonicalTypeInternal().getTypePtr();
418 atype
= cast
<ArrayType
>(type
);
419 return 1 + array_depth(atype
->getElementType().getTypePtr());
424 /* Return the depth of the array accessed by the index expression "index".
425 * If "index" is an affine expression, i.e., if it does not access
426 * any array, then return 1.
427 * If "index" represent a member access, i.e., if its range is a wrapped
428 * relation, then return the sum of the depth of the array of structures
429 * and that of the member inside the structure.
431 static int extract_depth(__isl_keep isl_multi_pw_aff
*index
)
439 if (isl_multi_pw_aff_range_is_wrapping(index
)) {
440 int domain_depth
, range_depth
;
441 isl_multi_pw_aff
*domain
, *range
;
443 domain
= isl_multi_pw_aff_copy(index
);
444 domain
= isl_multi_pw_aff_range_factor_domain(domain
);
445 domain_depth
= extract_depth(domain
);
446 isl_multi_pw_aff_free(domain
);
447 range
= isl_multi_pw_aff_copy(index
);
448 range
= isl_multi_pw_aff_range_factor_range(range
);
449 range_depth
= extract_depth(range
);
450 isl_multi_pw_aff_free(range
);
452 return domain_depth
+ range_depth
;
455 if (!isl_multi_pw_aff_has_tuple_id(index
, isl_dim_out
))
458 id
= isl_multi_pw_aff_get_tuple_id(index
, isl_dim_out
);
461 decl
= (ValueDecl
*) isl_id_get_user(id
);
464 return array_depth(decl
->getType().getTypePtr());
467 /* Return the depth of the array accessed by the access expression "expr".
469 static int extract_depth(__isl_keep pet_expr
*expr
)
471 isl_multi_pw_aff
*index
;
474 index
= pet_expr_access_get_index(expr
);
475 depth
= extract_depth(index
);
476 isl_multi_pw_aff_free(index
);
481 /* Construct a pet_expr representing an index expression for an access
482 * to the variable referenced by "expr".
484 * If "expr" references an enum constant, then return an integer expression
485 * instead, representing the value of the enum constant.
487 __isl_give pet_expr
*PetScan::extract_index_expr(DeclRefExpr
*expr
)
489 return extract_index_expr(expr
->getDecl());
492 /* Construct a pet_expr representing an index expression for an access
493 * to the variable "decl".
495 * If "decl" is an enum constant, then we return an integer expression
496 * instead, representing the value of the enum constant.
498 __isl_give pet_expr
*PetScan::extract_index_expr(ValueDecl
*decl
)
503 if (isa
<EnumConstantDecl
>(decl
))
504 return extract_expr(cast
<EnumConstantDecl
>(decl
));
506 id
= create_decl_id(ctx
, decl
);
507 space
= isl_space_alloc(ctx
, 0, 0, 0);
508 space
= isl_space_set_tuple_id(space
, isl_dim_out
, id
);
510 return pet_expr_from_index(isl_multi_pw_aff_zero(space
));
513 /* Construct a pet_expr representing the index expression "expr"
514 * Return NULL on error.
516 * If "expr" is a reference to an enum constant, then return
517 * an integer expression instead, representing the value of the enum constant.
519 __isl_give pet_expr
*PetScan::extract_index_expr(Expr
*expr
)
521 switch (expr
->getStmtClass()) {
522 case Stmt::ImplicitCastExprClass
:
523 return extract_index_expr(cast
<ImplicitCastExpr
>(expr
));
524 case Stmt::DeclRefExprClass
:
525 return extract_index_expr(cast
<DeclRefExpr
>(expr
));
526 case Stmt::ArraySubscriptExprClass
:
527 return extract_index_expr(cast
<ArraySubscriptExpr
>(expr
));
528 case Stmt::IntegerLiteralClass
:
529 return extract_expr(cast
<IntegerLiteral
>(expr
));
530 case Stmt::MemberExprClass
:
531 return extract_index_expr(cast
<MemberExpr
>(expr
));
538 /* Extract an index expression from the given array subscript expression.
540 * We first extract an index expression from the base.
541 * This will result in an index expression with a range that corresponds
542 * to the earlier indices.
543 * We then extract the current index and let
544 * pet_expr_access_subscript combine the two.
546 __isl_give pet_expr
*PetScan::extract_index_expr(ArraySubscriptExpr
*expr
)
548 Expr
*base
= expr
->getBase();
549 Expr
*idx
= expr
->getIdx();
553 base_expr
= extract_index_expr(base
);
554 index
= extract_expr(idx
);
556 base_expr
= pet_expr_access_subscript(base_expr
, index
);
561 /* Extract an index expression from a member expression.
563 * If the base access (to the structure containing the member)
568 * and the member is called "f", then the member access is of
573 * If the member access is to an anonymous struct, then simply return
577 * If the member access in the source code is of the form
581 * then it is treated as
585 __isl_give pet_expr
*PetScan::extract_index_expr(MemberExpr
*expr
)
587 Expr
*base
= expr
->getBase();
588 FieldDecl
*field
= cast
<FieldDecl
>(expr
->getMemberDecl());
589 pet_expr
*base_index
;
592 base_index
= extract_index_expr(base
);
594 if (expr
->isArrow()) {
595 pet_expr
*index
= pet_expr_new_int(isl_val_zero(ctx
));
596 base_index
= pet_expr_access_subscript(base_index
, index
);
599 if (field
->isAnonymousStructOrUnion())
602 id
= create_decl_id(ctx
, field
);
604 return pet_expr_access_member(base_index
, id
);
607 /* Mark the given access pet_expr as a write.
609 static __isl_give pet_expr
*mark_write(__isl_take pet_expr
*access
)
611 access
= pet_expr_access_set_write(access
, 1);
612 access
= pet_expr_access_set_read(access
, 0);
617 /* Construct a pet_expr representing a unary operator expression.
619 __isl_give pet_expr
*PetScan::extract_expr(UnaryOperator
*expr
)
625 op
= UnaryOperatorKind2pet_op_type(expr
->getOpcode());
626 if (op
== pet_op_last
) {
631 arg
= extract_expr(expr
->getSubExpr());
633 if (expr
->isIncrementDecrementOp() &&
634 pet_expr_get_type(arg
) == pet_expr_access
) {
635 arg
= mark_write(arg
);
636 arg
= pet_expr_access_set_read(arg
, 1);
639 type_size
= get_type_size(expr
->getType(), ast_context
);
640 return pet_expr_new_unary(type_size
, op
, arg
);
643 /* Construct a pet_expr representing a binary operator expression.
645 * If the top level operator is an assignment and the LHS is an access,
646 * then we mark that access as a write. If the operator is a compound
647 * assignment, the access is marked as both a read and a write.
649 __isl_give pet_expr
*PetScan::extract_expr(BinaryOperator
*expr
)
655 op
= BinaryOperatorKind2pet_op_type(expr
->getOpcode());
656 if (op
== pet_op_last
) {
661 lhs
= extract_expr(expr
->getLHS());
662 rhs
= extract_expr(expr
->getRHS());
664 if (expr
->isAssignmentOp() &&
665 pet_expr_get_type(lhs
) == pet_expr_access
) {
666 lhs
= mark_write(lhs
);
667 if (expr
->isCompoundAssignmentOp())
668 lhs
= pet_expr_access_set_read(lhs
, 1);
671 type_size
= get_type_size(expr
->getType(), ast_context
);
672 return pet_expr_new_binary(type_size
, op
, lhs
, rhs
);
675 /* Construct a pet_tree for a (single) variable declaration.
677 __isl_give pet_tree
*PetScan::extract(DeclStmt
*stmt
)
684 if (!stmt
->isSingleDecl()) {
689 decl
= stmt
->getSingleDecl();
690 vd
= cast
<VarDecl
>(decl
);
692 lhs
= extract_access_expr(vd
);
693 lhs
= mark_write(lhs
);
695 tree
= pet_tree_new_decl(lhs
);
697 rhs
= extract_expr(vd
->getInit());
698 tree
= pet_tree_new_decl_init(lhs
, rhs
);
704 /* Construct a pet_expr representing a conditional operation.
706 __isl_give pet_expr
*PetScan::extract_expr(ConditionalOperator
*expr
)
708 pet_expr
*cond
, *lhs
, *rhs
;
711 cond
= extract_expr(expr
->getCond());
712 lhs
= extract_expr(expr
->getTrueExpr());
713 rhs
= extract_expr(expr
->getFalseExpr());
715 return pet_expr_new_ternary(cond
, lhs
, rhs
);
718 __isl_give pet_expr
*PetScan::extract_expr(ImplicitCastExpr
*expr
)
720 return extract_expr(expr
->getSubExpr());
723 /* Construct a pet_expr representing a floating point value.
725 * If the floating point literal does not appear in a macro,
726 * then we use the original representation in the source code
727 * as the string representation. Otherwise, we use the pretty
728 * printer to produce a string representation.
730 __isl_give pet_expr
*PetScan::extract_expr(FloatingLiteral
*expr
)
734 const LangOptions
&LO
= PP
.getLangOpts();
735 SourceLocation loc
= expr
->getLocation();
737 if (!loc
.isMacroID()) {
738 SourceManager
&SM
= PP
.getSourceManager();
739 unsigned len
= Lexer::MeasureTokenLength(loc
, SM
, LO
);
740 s
= string(SM
.getCharacterData(loc
), len
);
742 llvm::raw_string_ostream
S(s
);
743 expr
->printPretty(S
, 0, PrintingPolicy(LO
));
746 d
= expr
->getValueAsApproximateDouble();
747 return pet_expr_new_double(ctx
, d
, s
.c_str());
750 /* Convert the index expression "index" into an access pet_expr of type "qt".
752 __isl_give pet_expr
*PetScan::extract_access_expr(QualType qt
,
753 __isl_take pet_expr
*index
)
758 depth
= extract_depth(index
);
759 type_size
= get_type_size(qt
, ast_context
);
761 index
= pet_expr_set_type_size(index
, type_size
);
762 index
= pet_expr_access_set_depth(index
, depth
);
767 /* Extract an index expression from "expr" and then convert it into
768 * an access pet_expr.
770 * If "expr" is a reference to an enum constant, then return
771 * an integer expression instead, representing the value of the enum constant.
773 __isl_give pet_expr
*PetScan::extract_access_expr(Expr
*expr
)
777 index
= extract_index_expr(expr
);
779 if (pet_expr_get_type(index
) == pet_expr_int
)
782 return extract_access_expr(expr
->getType(), index
);
785 /* Extract an index expression from "decl" and then convert it into
786 * an access pet_expr.
788 __isl_give pet_expr
*PetScan::extract_access_expr(ValueDecl
*decl
)
790 return extract_access_expr(decl
->getType(), extract_index_expr(decl
));
793 __isl_give pet_expr
*PetScan::extract_expr(ParenExpr
*expr
)
795 return extract_expr(expr
->getSubExpr());
798 /* Extract an assume statement from the argument "expr"
799 * of a __pencil_assume statement.
801 __isl_give pet_expr
*PetScan::extract_assume(Expr
*expr
)
803 return pet_expr_new_unary(0, pet_op_assume
, extract_expr(expr
));
806 /* Construct a pet_expr corresponding to the function call argument "expr".
807 * The argument appears in position "pos" of a call to function "fd".
809 * If we are passing along a pointer to an array element
810 * or an entire row or even higher dimensional slice of an array,
811 * then the function being called may write into the array.
813 * We assume here that if the function is declared to take a pointer
814 * to a const type, then the function will perform a read
815 * and that otherwise, it will perform a write.
816 * We only perform this check if "detect_writes" is set.
818 __isl_give pet_expr
*PetScan::extract_argument(FunctionDecl
*fd
, int pos
,
819 Expr
*expr
, bool detect_writes
)
822 int is_addr
= 0, is_partial
= 0;
825 if (expr
->getStmtClass() == Stmt::ImplicitCastExprClass
) {
826 ImplicitCastExpr
*ice
= cast
<ImplicitCastExpr
>(expr
);
827 expr
= ice
->getSubExpr();
829 if (expr
->getStmtClass() == Stmt::UnaryOperatorClass
) {
830 UnaryOperator
*op
= cast
<UnaryOperator
>(expr
);
831 if (op
->getOpcode() == UO_AddrOf
) {
833 expr
= op
->getSubExpr();
836 res
= extract_expr(expr
);
839 sc
= expr
->getStmtClass();
840 if ((sc
== Stmt::ArraySubscriptExprClass
||
841 sc
== Stmt::DeclRefExprClass
||
842 sc
== Stmt::MemberExprClass
) &&
843 array_depth(expr
->getType().getTypePtr()) > 0)
845 if (detect_writes
&& (is_addr
|| is_partial
) &&
846 pet_expr_get_type(res
) == pet_expr_access
) {
848 if (!fd
->hasPrototype()) {
849 report_prototype_required(expr
);
850 return pet_expr_free(res
);
852 parm
= fd
->getParamDecl(pos
);
853 if (!const_base(parm
->getType()))
854 res
= mark_write(res
);
858 res
= pet_expr_new_unary(0, pet_op_address_of
, res
);
862 /* Find the first FunctionDecl with the given name.
863 * "call" is the corresponding call expression and is only used
864 * for reporting errors.
866 * Return NULL on error.
868 FunctionDecl
*PetScan::find_decl_from_name(CallExpr
*call
, string name
)
870 TranslationUnitDecl
*tu
= ast_context
.getTranslationUnitDecl();
871 DeclContext::decl_iterator begin
= tu
->decls_begin();
872 DeclContext::decl_iterator end
= tu
->decls_end();
873 for (DeclContext::decl_iterator i
= begin
; i
!= end
; ++i
) {
874 FunctionDecl
*fd
= dyn_cast
<FunctionDecl
>(*i
);
877 if (fd
->getName().str().compare(name
) != 0)
881 report_missing_summary_function_body(call
);
884 report_missing_summary_function(call
);
888 /* Return the FunctionDecl for the summary function associated to the
889 * function called by "call".
891 * In particular, search for an annotate attribute formatted as
892 * "pencil_access(name)", where "name" is the name of the summary function.
894 * If no summary function was specified, then return the FunctionDecl
895 * that is actually being called.
897 * Return NULL on error.
899 FunctionDecl
*PetScan::get_summary_function(CallExpr
*call
)
901 FunctionDecl
*decl
= call
->getDirectCallee();
905 specific_attr_iterator
<AnnotateAttr
> begin
, end
, i
;
906 begin
= decl
->specific_attr_begin
<AnnotateAttr
>();
907 end
= decl
->specific_attr_end
<AnnotateAttr
>();
908 for (i
= begin
; i
!= end
; ++i
) {
909 string attr
= (*i
)->getAnnotation().str();
911 const char prefix
[] = "pencil_access(";
912 size_t start
= attr
.find(prefix
);
913 if (start
== string::npos
)
915 start
+= strlen(prefix
);
916 string name
= attr
.substr(start
, attr
.find(')') - start
);
918 return find_decl_from_name(call
, name
);
924 /* Construct a pet_expr representing a function call.
926 * In the special case of a "call" to __pencil_assume,
927 * construct an assume expression instead.
929 * In the case of a "call" to __pencil_kill, the arguments
930 * are neither read nor written (only killed), so there
931 * is no need to check for writes to these arguments.
933 __isl_give pet_expr
*PetScan::extract_expr(CallExpr
*expr
)
935 pet_expr
*res
= NULL
;
941 fd
= expr
->getDirectCallee();
947 name
= fd
->getDeclName().getAsString();
948 n_arg
= expr
->getNumArgs();
950 if (n_arg
== 1 && name
== "__pencil_assume")
951 return extract_assume(expr
->getArg(0));
952 is_kill
= name
== "__pencil_kill";
954 res
= pet_expr_new_call(ctx
, name
.c_str(), n_arg
);
958 for (int i
= 0; i
< n_arg
; ++i
) {
959 Expr
*arg
= expr
->getArg(i
);
960 res
= pet_expr_set_arg(res
, i
,
961 PetScan::extract_argument(fd
, i
, arg
, !is_kill
));
964 fd
= get_summary_function(expr
);
966 return pet_expr_free(res
);
968 res
= set_summary(res
, fd
);
973 /* Construct a pet_expr representing a (C style) cast.
975 __isl_give pet_expr
*PetScan::extract_expr(CStyleCastExpr
*expr
)
980 arg
= extract_expr(expr
->getSubExpr());
984 type
= expr
->getTypeAsWritten();
985 return pet_expr_new_cast(type
.getAsString().c_str(), arg
);
988 /* Construct a pet_expr representing an integer.
990 __isl_give pet_expr
*PetScan::extract_expr(IntegerLiteral
*expr
)
992 return pet_expr_new_int(extract_int(expr
));
995 /* Construct a pet_expr representing the integer enum constant "ecd".
997 __isl_give pet_expr
*PetScan::extract_expr(EnumConstantDecl
*ecd
)
1000 const llvm::APSInt
&init
= ecd
->getInitVal();
1001 v
= ::extract_int(ctx
, init
.isSigned(), init
);
1002 return pet_expr_new_int(v
);
1005 /* Try and construct a pet_expr representing "expr".
1007 __isl_give pet_expr
*PetScan::extract_expr(Expr
*expr
)
1009 switch (expr
->getStmtClass()) {
1010 case Stmt::UnaryOperatorClass
:
1011 return extract_expr(cast
<UnaryOperator
>(expr
));
1012 case Stmt::CompoundAssignOperatorClass
:
1013 case Stmt::BinaryOperatorClass
:
1014 return extract_expr(cast
<BinaryOperator
>(expr
));
1015 case Stmt::ImplicitCastExprClass
:
1016 return extract_expr(cast
<ImplicitCastExpr
>(expr
));
1017 case Stmt::ArraySubscriptExprClass
:
1018 case Stmt::DeclRefExprClass
:
1019 case Stmt::MemberExprClass
:
1020 return extract_access_expr(expr
);
1021 case Stmt::IntegerLiteralClass
:
1022 return extract_expr(cast
<IntegerLiteral
>(expr
));
1023 case Stmt::FloatingLiteralClass
:
1024 return extract_expr(cast
<FloatingLiteral
>(expr
));
1025 case Stmt::ParenExprClass
:
1026 return extract_expr(cast
<ParenExpr
>(expr
));
1027 case Stmt::ConditionalOperatorClass
:
1028 return extract_expr(cast
<ConditionalOperator
>(expr
));
1029 case Stmt::CallExprClass
:
1030 return extract_expr(cast
<CallExpr
>(expr
));
1031 case Stmt::CStyleCastExprClass
:
1032 return extract_expr(cast
<CStyleCastExpr
>(expr
));
1039 /* Check if the given initialization statement is an assignment.
1040 * If so, return that assignment. Otherwise return NULL.
1042 BinaryOperator
*PetScan::initialization_assignment(Stmt
*init
)
1044 BinaryOperator
*ass
;
1046 if (init
->getStmtClass() != Stmt::BinaryOperatorClass
)
1049 ass
= cast
<BinaryOperator
>(init
);
1050 if (ass
->getOpcode() != BO_Assign
)
1056 /* Check if the given initialization statement is a declaration
1057 * of a single variable.
1058 * If so, return that declaration. Otherwise return NULL.
1060 Decl
*PetScan::initialization_declaration(Stmt
*init
)
1064 if (init
->getStmtClass() != Stmt::DeclStmtClass
)
1067 decl
= cast
<DeclStmt
>(init
);
1069 if (!decl
->isSingleDecl())
1072 return decl
->getSingleDecl();
1075 /* Given the assignment operator in the initialization of a for loop,
1076 * extract the induction variable, i.e., the (integer)variable being
1079 ValueDecl
*PetScan::extract_induction_variable(BinaryOperator
*init
)
1086 lhs
= init
->getLHS();
1087 if (lhs
->getStmtClass() != Stmt::DeclRefExprClass
) {
1092 ref
= cast
<DeclRefExpr
>(lhs
);
1093 decl
= ref
->getDecl();
1094 type
= decl
->getType().getTypePtr();
1096 if (!type
->isIntegerType()) {
1104 /* Given the initialization statement of a for loop and the single
1105 * declaration in this initialization statement,
1106 * extract the induction variable, i.e., the (integer) variable being
1109 VarDecl
*PetScan::extract_induction_variable(Stmt
*init
, Decl
*decl
)
1113 vd
= cast
<VarDecl
>(decl
);
1115 const QualType type
= vd
->getType();
1116 if (!type
->isIntegerType()) {
1121 if (!vd
->getInit()) {
1129 /* Check that op is of the form iv++ or iv--.
1130 * Return a pet_expr representing "1" or "-1" accordingly.
1132 __isl_give pet_expr
*PetScan::extract_unary_increment(
1133 clang::UnaryOperator
*op
, clang::ValueDecl
*iv
)
1139 if (!op
->isIncrementDecrementOp()) {
1144 sub
= op
->getSubExpr();
1145 if (sub
->getStmtClass() != Stmt::DeclRefExprClass
) {
1150 ref
= cast
<DeclRefExpr
>(sub
);
1151 if (ref
->getDecl() != iv
) {
1156 if (op
->isIncrementOp())
1157 v
= isl_val_one(ctx
);
1159 v
= isl_val_negone(ctx
);
1161 return pet_expr_new_int(v
);
1164 /* Check if op is of the form
1168 * and return the increment "expr - iv" as a pet_expr.
1170 __isl_give pet_expr
*PetScan::extract_binary_increment(BinaryOperator
*op
,
1171 clang::ValueDecl
*iv
)
1176 pet_expr
*expr
, *expr_iv
;
1178 if (op
->getOpcode() != BO_Assign
) {
1184 if (lhs
->getStmtClass() != Stmt::DeclRefExprClass
) {
1189 ref
= cast
<DeclRefExpr
>(lhs
);
1190 if (ref
->getDecl() != iv
) {
1195 expr
= extract_expr(op
->getRHS());
1196 expr_iv
= extract_expr(lhs
);
1198 type_size
= get_type_size(iv
->getType(), ast_context
);
1199 return pet_expr_new_binary(type_size
, pet_op_sub
, expr
, expr_iv
);
1202 /* Check that op is of the form iv += cst or iv -= cst
1203 * and return a pet_expr corresponding to cst or -cst accordingly.
1205 __isl_give pet_expr
*PetScan::extract_compound_increment(
1206 CompoundAssignOperator
*op
, clang::ValueDecl
*iv
)
1212 BinaryOperatorKind opcode
;
1214 opcode
= op
->getOpcode();
1215 if (opcode
!= BO_AddAssign
&& opcode
!= BO_SubAssign
) {
1219 if (opcode
== BO_SubAssign
)
1223 if (lhs
->getStmtClass() != Stmt::DeclRefExprClass
) {
1228 ref
= cast
<DeclRefExpr
>(lhs
);
1229 if (ref
->getDecl() != iv
) {
1234 expr
= extract_expr(op
->getRHS());
1237 type_size
= get_type_size(op
->getType(), ast_context
);
1238 expr
= pet_expr_new_unary(type_size
, pet_op_minus
, expr
);
1244 /* Check that the increment of the given for loop increments
1245 * (or decrements) the induction variable "iv" and return
1246 * the increment as a pet_expr if successful.
1248 __isl_give pet_expr
*PetScan::extract_increment(clang::ForStmt
*stmt
,
1251 Stmt
*inc
= stmt
->getInc();
1254 report_missing_increment(stmt
);
1258 if (inc
->getStmtClass() == Stmt::UnaryOperatorClass
)
1259 return extract_unary_increment(cast
<UnaryOperator
>(inc
), iv
);
1260 if (inc
->getStmtClass() == Stmt::CompoundAssignOperatorClass
)
1261 return extract_compound_increment(
1262 cast
<CompoundAssignOperator
>(inc
), iv
);
1263 if (inc
->getStmtClass() == Stmt::BinaryOperatorClass
)
1264 return extract_binary_increment(cast
<BinaryOperator
>(inc
), iv
);
1270 /* Construct a pet_tree for a while loop.
1272 * If we were only able to extract part of the body, then simply
1275 __isl_give pet_tree
*PetScan::extract(WhileStmt
*stmt
)
1280 tree
= extract(stmt
->getBody());
1283 pe_cond
= extract_expr(stmt
->getCond());
1284 tree
= pet_tree_new_while(pe_cond
, tree
);
1289 /* Construct a pet_tree for a for statement.
1290 * The for loop is required to be of one of the following forms
1292 * for (i = init; condition; ++i)
1293 * for (i = init; condition; --i)
1294 * for (i = init; condition; i += constant)
1295 * for (i = init; condition; i -= constant)
1297 * We extract a pet_tree for the body and then include it in a pet_tree
1298 * of type pet_tree_for.
1300 * As a special case, we also allow a for loop of the form
1304 * in which case we return a pet_tree of type pet_tree_infinite_loop.
1306 * If we were only able to extract part of the body, then simply
1309 __isl_give pet_tree
*PetScan::extract_for(ForStmt
*stmt
)
1311 BinaryOperator
*ass
;
1317 struct pet_scop
*scop
;
1320 pet_expr
*pe_init
, *pe_inc
, *pe_iv
, *pe_cond
;
1322 independent
= is_current_stmt_marked_independent();
1324 if (!stmt
->getInit() && !stmt
->getCond() && !stmt
->getInc()) {
1325 tree
= extract(stmt
->getBody());
1328 tree
= pet_tree_new_infinite_loop(tree
);
1332 init
= stmt
->getInit();
1337 if ((ass
= initialization_assignment(init
)) != NULL
) {
1338 iv
= extract_induction_variable(ass
);
1341 lhs
= ass
->getLHS();
1342 rhs
= ass
->getRHS();
1343 } else if ((decl
= initialization_declaration(init
)) != NULL
) {
1344 VarDecl
*var
= extract_induction_variable(init
, decl
);
1348 rhs
= var
->getInit();
1349 lhs
= create_DeclRefExpr(var
);
1351 unsupported(stmt
->getInit());
1355 declared
= !initialization_assignment(stmt
->getInit());
1356 tree
= extract(stmt
->getBody());
1359 pe_iv
= extract_access_expr(iv
);
1360 pe_iv
= mark_write(pe_iv
);
1361 pe_init
= extract_expr(rhs
);
1362 if (!stmt
->getCond())
1363 pe_cond
= pet_expr_new_int(isl_val_one(ctx
));
1365 pe_cond
= extract_expr(stmt
->getCond());
1366 pe_inc
= extract_increment(stmt
, iv
);
1367 tree
= pet_tree_new_for(independent
, declared
, pe_iv
, pe_init
, pe_cond
,
1372 /* Try and construct a pet_tree corresponding to a compound statement.
1374 * "skip_declarations" is set if we should skip initial declarations
1375 * in the children of the compound statements. This then implies
1376 * that this sequence of children should not be treated as a block
1377 * since the initial statements may be skipped.
1379 __isl_give pet_tree
*PetScan::extract(CompoundStmt
*stmt
,
1380 bool skip_declarations
)
1382 return extract(stmt
->children(), !skip_declarations
, skip_declarations
);
1385 /* Return the file offset of the expansion location of "Loc".
1387 static unsigned getExpansionOffset(SourceManager
&SM
, SourceLocation Loc
)
1389 return SM
.getFileOffset(SM
.getExpansionLoc(Loc
));
1392 #ifdef HAVE_FINDLOCATIONAFTERTOKEN
1394 /* Return a SourceLocation for the location after the first semicolon
1395 * after "loc". If Lexer::findLocationAfterToken is available, we simply
1396 * call it and also skip trailing spaces and newline.
1398 static SourceLocation
location_after_semi(SourceLocation loc
, SourceManager
&SM
,
1399 const LangOptions
&LO
)
1401 return Lexer::findLocationAfterToken(loc
, tok::semi
, SM
, LO
, true);
1406 /* Return a SourceLocation for the location after the first semicolon
1407 * after "loc". If Lexer::findLocationAfterToken is not available,
1408 * we look in the underlying character data for the first semicolon.
1410 static SourceLocation
location_after_semi(SourceLocation loc
, SourceManager
&SM
,
1411 const LangOptions
&LO
)
1414 const char *s
= SM
.getCharacterData(loc
);
1416 semi
= strchr(s
, ';');
1418 return SourceLocation();
1419 return loc
.getFileLocWithOffset(semi
+ 1 - s
);
1424 /* If the token at "loc" is the first token on the line, then return
1425 * a location referring to the start of the line and set *indent
1426 * to the indentation of "loc"
1427 * Otherwise, return "loc" and set *indent to "".
1429 * This function is used to extend a scop to the start of the line
1430 * if the first token of the scop is also the first token on the line.
1432 * We look for the first token on the line. If its location is equal to "loc",
1433 * then the latter is the location of the first token on the line.
1435 static SourceLocation
move_to_start_of_line_if_first_token(SourceLocation loc
,
1436 SourceManager
&SM
, const LangOptions
&LO
, char **indent
)
1438 std::pair
<FileID
, unsigned> file_offset_pair
;
1439 llvm::StringRef file
;
1442 SourceLocation token_loc
, line_loc
;
1446 loc
= SM
.getExpansionLoc(loc
);
1447 col
= SM
.getExpansionColumnNumber(loc
);
1448 line_loc
= loc
.getLocWithOffset(1 - col
);
1449 file_offset_pair
= SM
.getDecomposedLoc(line_loc
);
1450 file
= SM
.getBufferData(file_offset_pair
.first
, NULL
);
1451 pos
= file
.data() + file_offset_pair
.second
;
1453 Lexer
lexer(SM
.getLocForStartOfFile(file_offset_pair
.first
), LO
,
1454 file
.begin(), pos
, file
.end());
1455 lexer
.LexFromRawLexer(tok
);
1456 token_loc
= tok
.getLocation();
1458 s
= SM
.getCharacterData(line_loc
);
1459 *indent
= strndup(s
, token_loc
== loc
? col
- 1 : 0);
1461 if (token_loc
== loc
)
1467 /* Construct a pet_loc corresponding to the region covered by "range".
1468 * If "skip_semi" is set, then we assume "range" is followed by
1469 * a semicolon and also include this semicolon.
1471 __isl_give pet_loc
*PetScan::construct_pet_loc(SourceRange range
,
1474 SourceLocation loc
= range
.getBegin();
1475 SourceManager
&SM
= PP
.getSourceManager();
1476 const LangOptions
&LO
= PP
.getLangOpts();
1477 int line
= PP
.getSourceManager().getExpansionLineNumber(loc
);
1478 unsigned start
, end
;
1481 loc
= move_to_start_of_line_if_first_token(loc
, SM
, LO
, &indent
);
1482 start
= getExpansionOffset(SM
, loc
);
1483 loc
= range
.getEnd();
1485 loc
= location_after_semi(loc
, SM
, LO
);
1487 loc
= PP
.getLocForEndOfToken(loc
);
1488 end
= getExpansionOffset(SM
, loc
);
1490 return pet_loc_alloc(ctx
, start
, end
, line
, indent
);
1493 /* Convert a top-level pet_expr to an expression pet_tree.
1495 __isl_give pet_tree
*PetScan::extract(__isl_take pet_expr
*expr
,
1496 SourceRange range
, bool skip_semi
)
1501 tree
= pet_tree_new_expr(expr
);
1502 loc
= construct_pet_loc(range
, skip_semi
);
1503 tree
= pet_tree_set_loc(tree
, loc
);
1508 /* Construct a pet_tree for an if statement.
1510 __isl_give pet_tree
*PetScan::extract(IfStmt
*stmt
)
1513 pet_tree
*tree
, *tree_else
;
1514 struct pet_scop
*scop
;
1517 pe_cond
= extract_expr(stmt
->getCond());
1518 tree
= extract(stmt
->getThen());
1519 if (stmt
->getElse()) {
1520 tree_else
= extract(stmt
->getElse());
1521 if (options
->autodetect
) {
1522 if (tree
&& !tree_else
) {
1524 pet_expr_free(pe_cond
);
1527 if (!tree
&& tree_else
) {
1529 pet_expr_free(pe_cond
);
1533 tree
= pet_tree_new_if_else(pe_cond
, tree
, tree_else
);
1535 tree
= pet_tree_new_if(pe_cond
, tree
);
1539 /* Try and construct a pet_tree for a label statement.
1541 __isl_give pet_tree
*PetScan::extract(LabelStmt
*stmt
)
1546 label
= isl_id_alloc(ctx
, stmt
->getName(), NULL
);
1548 tree
= extract(stmt
->getSubStmt());
1549 tree
= pet_tree_set_label(tree
, label
);
1553 /* Update the location of "tree" to include the source range of "stmt".
1555 * Actually, we create a new location based on the source range of "stmt" and
1556 * then extend this new location to include the region of the original location.
1557 * This ensures that the line number of the final location refers to "stmt".
1559 __isl_give pet_tree
*PetScan::update_loc(__isl_take pet_tree
*tree
, Stmt
*stmt
)
1561 pet_loc
*loc
, *tree_loc
;
1563 tree_loc
= pet_tree_get_loc(tree
);
1564 loc
= construct_pet_loc(stmt
->getSourceRange(), false);
1565 loc
= pet_loc_update_start_end_from_loc(loc
, tree_loc
);
1566 pet_loc_free(tree_loc
);
1568 tree
= pet_tree_set_loc(tree
, loc
);
1572 /* Try and construct a pet_tree corresponding to "stmt".
1574 * If "stmt" is a compound statement, then "skip_declarations"
1575 * indicates whether we should skip initial declarations in the
1576 * compound statement.
1578 * If the constructed pet_tree is not a (possibly) partial representation
1579 * of "stmt", we update start and end of the pet_scop to those of "stmt".
1580 * In particular, if skip_declarations is set, then we may have skipped
1581 * declarations inside "stmt" and so the pet_scop may not represent
1582 * the entire "stmt".
1583 * Note that this function may be called with "stmt" referring to the entire
1584 * body of the function, including the outer braces. In such cases,
1585 * skip_declarations will be set and the braces will not be taken into
1586 * account in tree->loc.
1588 __isl_give pet_tree
*PetScan::extract(Stmt
*stmt
, bool skip_declarations
)
1592 set_current_stmt(stmt
);
1594 if (isa
<Expr
>(stmt
))
1595 return extract(extract_expr(cast
<Expr
>(stmt
)),
1596 stmt
->getSourceRange(), true);
1598 switch (stmt
->getStmtClass()) {
1599 case Stmt::WhileStmtClass
:
1600 tree
= extract(cast
<WhileStmt
>(stmt
));
1602 case Stmt::ForStmtClass
:
1603 tree
= extract_for(cast
<ForStmt
>(stmt
));
1605 case Stmt::IfStmtClass
:
1606 tree
= extract(cast
<IfStmt
>(stmt
));
1608 case Stmt::CompoundStmtClass
:
1609 tree
= extract(cast
<CompoundStmt
>(stmt
), skip_declarations
);
1611 case Stmt::LabelStmtClass
:
1612 tree
= extract(cast
<LabelStmt
>(stmt
));
1614 case Stmt::ContinueStmtClass
:
1615 tree
= pet_tree_new_continue(ctx
);
1617 case Stmt::BreakStmtClass
:
1618 tree
= pet_tree_new_break(ctx
);
1620 case Stmt::DeclStmtClass
:
1621 tree
= extract(cast
<DeclStmt
>(stmt
));
1628 if (partial
|| skip_declarations
)
1631 return update_loc(tree
, stmt
);
1634 /* Try and construct a pet_tree corresponding to (part of)
1635 * a sequence of statements.
1637 * "block" is set if the sequence represents the children of
1638 * a compound statement.
1639 * "skip_declarations" is set if we should skip initial declarations
1640 * in the sequence of statements.
1642 * If autodetect is set, then we allow the extraction of only a subrange
1643 * of the sequence of statements. However, if there is at least one statement
1644 * for which we could not construct a scop and the final range contains
1645 * either no statements or at least one kill, then we discard the entire
1648 __isl_give pet_tree
*PetScan::extract(StmtRange stmt_range
, bool block
,
1649 bool skip_declarations
)
1653 bool has_kills
= false;
1654 bool partial_range
= false;
1656 set
<struct pet_stmt
*> kills
;
1657 set
<struct pet_stmt
*>::iterator it
;
1659 for (i
= stmt_range
.first
, j
= 0; i
!= stmt_range
.second
; ++i
, ++j
)
1662 tree
= pet_tree_new_block(ctx
, block
, j
);
1664 for (i
= stmt_range
.first
; i
!= stmt_range
.second
; ++i
) {
1668 if (pet_tree_block_n_child(tree
) == 0 && skip_declarations
&&
1669 child
->getStmtClass() == Stmt::DeclStmtClass
)
1672 tree_i
= extract(child
);
1673 if (pet_tree_block_n_child(tree
) != 0 && partial
) {
1674 pet_tree_free(tree_i
);
1677 if (tree_i
&& child
->getStmtClass() == Stmt::DeclStmtClass
&&
1680 if (options
->autodetect
) {
1682 tree
= pet_tree_block_add_child(tree
, tree_i
);
1684 partial_range
= true;
1685 if (pet_tree_block_n_child(tree
) != 0 && !tree_i
)
1688 tree
= pet_tree_block_add_child(tree
, tree_i
);
1691 if (partial
|| !tree
)
1695 if (tree
&& partial_range
) {
1696 if (pet_tree_block_n_child(tree
) == 0 || has_kills
) {
1697 pet_tree_free(tree
);
1706 /* Is "T" the type of a variable length array with static size?
1708 static bool is_vla_with_static_size(QualType T
)
1710 const VariableArrayType
*vlatype
;
1712 if (!T
->isVariableArrayType())
1714 vlatype
= cast
<VariableArrayType
>(T
);
1715 return vlatype
->getSizeModifier() == VariableArrayType::Static
;
1718 /* Return the type of "decl" as an array.
1720 * In particular, if "decl" is a parameter declaration that
1721 * is a variable length array with a static size, then
1722 * return the original type (i.e., the variable length array).
1723 * Otherwise, return the type of decl.
1725 static QualType
get_array_type(ValueDecl
*decl
)
1730 parm
= dyn_cast
<ParmVarDecl
>(decl
);
1732 return decl
->getType();
1734 T
= parm
->getOriginalType();
1735 if (!is_vla_with_static_size(T
))
1736 return decl
->getType();
1741 static __isl_give pet_expr
*get_array_size(__isl_keep pet_expr
*access
,
1743 static struct pet_array
*extract_array(__isl_keep pet_expr
*access
,
1744 __isl_keep pet_context
*pc
, void *user
);
1747 /* Construct a pet_expr that holds the sizes of the array accessed
1749 * This function is used as a callback to pet_context_add_parameters,
1750 * which is also passed a pointer to the PetScan object.
1752 static __isl_give pet_expr
*get_array_size(__isl_keep pet_expr
*access
,
1755 PetScan
*ps
= (PetScan
*) user
;
1760 id
= pet_expr_access_get_id(access
);
1761 decl
= (ValueDecl
*) isl_id_get_user(id
);
1763 type
= get_array_type(decl
).getTypePtr();
1764 return ps
->get_array_size(type
);
1767 /* Construct and return a pet_array corresponding to the variable
1768 * accessed by "access".
1769 * This function is used as a callback to pet_scop_from_pet_tree,
1770 * which is also passed a pointer to the PetScan object.
1772 static struct pet_array
*extract_array(__isl_keep pet_expr
*access
,
1773 __isl_keep pet_context
*pc
, void *user
)
1775 PetScan
*ps
= (PetScan
*) user
;
1780 ctx
= pet_expr_get_ctx(access
);
1781 id
= pet_expr_access_get_id(access
);
1782 iv
= (ValueDecl
*) isl_id_get_user(id
);
1784 return ps
->extract_array(ctx
, iv
, NULL
, pc
);
1787 /* Extract a function summary from the body of "fd".
1789 * We extract a scop from the function body in a context with as
1790 * parameters the integer arguments of the function.
1791 * We turn off autodetection (in case it was set) to ensure that
1792 * the entire function body is considered.
1793 * We then collect the accessed array elements and attach them
1794 * to the corresponding array arguments, taking into account
1795 * that the function body may access members of array elements.
1797 * The reason for representing the integer arguments as parameters in
1798 * the context is that if we were to instead start with a context
1799 * with the function arguments as initial dimensions, then we would not
1800 * be able to refer to them from the array extents, without turning
1801 * array extents into maps.
1803 * The result is stored in the summary_cache cache so that we can reuse
1804 * it if this method gets called on the same function again later on.
1806 __isl_give pet_function_summary
*PetScan::get_summary(FunctionDecl
*fd
)
1812 pet_function_summary
*summary
;
1815 int save_autodetect
;
1816 struct pet_scop
*scop
;
1818 isl_union_set
*may_read
, *may_write
, *must_write
;
1819 isl_union_map
*to_inner
;
1821 if (summary_cache
.find(fd
) != summary_cache
.end())
1822 return pet_function_summary_copy(summary_cache
[fd
]);
1824 space
= isl_space_set_alloc(ctx
, 0, 0);
1826 n
= fd
->getNumParams();
1827 summary
= pet_function_summary_alloc(ctx
, n
);
1828 for (int i
= 0; i
< n
; ++i
) {
1829 ParmVarDecl
*parm
= fd
->getParamDecl(i
);
1830 QualType type
= parm
->getType();
1833 if (!type
->isIntegerType())
1835 id
= create_decl_id(ctx
, parm
);
1836 space
= isl_space_insert_dims(space
, isl_dim_param
, 0, 1);
1837 space
= isl_space_set_dim_id(space
, isl_dim_param
, 0,
1839 summary
= pet_function_summary_set_int(summary
, i
, id
);
1842 save_autodetect
= options
->autodetect
;
1843 options
->autodetect
= 0;
1844 PetScan
body_scan(PP
, ast_context
, loc
, options
,
1845 isl_union_map_copy(value_bounds
), independent
);
1847 tree
= body_scan
.extract(fd
->getBody(), false);
1849 domain
= isl_set_universe(space
);
1850 pc
= pet_context_alloc(domain
);
1851 pc
= pet_context_add_parameters(pc
, tree
,
1852 &::get_array_size
, &body_scan
);
1853 int_size
= ast_context
.getTypeInfo(ast_context
.IntTy
).first
/ 8;
1854 scop
= pet_scop_from_pet_tree(tree
, int_size
,
1855 &::extract_array
, &body_scan
, pc
);
1856 scop
= scan_arrays(scop
, pc
);
1857 may_read
= isl_union_map_range(pet_scop_collect_may_reads(scop
));
1858 may_write
= isl_union_map_range(pet_scop_collect_may_writes(scop
));
1859 must_write
= isl_union_map_range(pet_scop_collect_must_writes(scop
));
1860 to_inner
= pet_scop_compute_outer_to_inner(scop
);
1861 pet_scop_free(scop
);
1863 for (int i
= 0; i
< n
; ++i
) {
1864 ParmVarDecl
*parm
= fd
->getParamDecl(i
);
1865 QualType type
= parm
->getType();
1866 struct pet_array
*array
;
1868 isl_union_set
*data_set
;
1869 isl_union_set
*may_read_i
, *may_write_i
, *must_write_i
;
1871 if (array_depth(type
.getTypePtr()) == 0)
1874 array
= body_scan
.extract_array(ctx
, parm
, NULL
, pc
);
1875 space
= array
? isl_set_get_space(array
->extent
) : NULL
;
1876 pet_array_free(array
);
1877 data_set
= isl_union_set_from_set(isl_set_universe(space
));
1878 data_set
= isl_union_set_apply(data_set
,
1879 isl_union_map_copy(to_inner
));
1880 may_read_i
= isl_union_set_intersect(
1881 isl_union_set_copy(may_read
),
1882 isl_union_set_copy(data_set
));
1883 may_write_i
= isl_union_set_intersect(
1884 isl_union_set_copy(may_write
),
1885 isl_union_set_copy(data_set
));
1886 must_write_i
= isl_union_set_intersect(
1887 isl_union_set_copy(must_write
), data_set
);
1888 summary
= pet_function_summary_set_array(summary
, i
,
1889 may_read_i
, may_write_i
, must_write_i
);
1892 isl_union_set_free(may_read
);
1893 isl_union_set_free(may_write
);
1894 isl_union_set_free(must_write
);
1895 isl_union_map_free(to_inner
);
1897 options
->autodetect
= save_autodetect
;
1898 pet_context_free(pc
);
1900 summary_cache
[fd
] = pet_function_summary_copy(summary
);
1905 /* If "fd" has a function body, then extract a function summary from
1906 * this body and attach it to the call expression "expr".
1908 * Even if a function body is available, "fd" itself may point
1909 * to a declaration without function body. We therefore first
1910 * replace it by the declaration that comes with a body (if any).
1912 * It is not clear why hasBody takes a reference to a const FunctionDecl *.
1913 * It seems that it is possible to directly use the iterators to obtain
1914 * a non-const pointer.
1915 * Since we are not going to use the pointer to modify anything anyway,
1916 * it seems safe to drop the constness. The alternative would be to
1917 * modify a lot of other functions to include const qualifiers.
1919 __isl_give pet_expr
*PetScan::set_summary(__isl_take pet_expr
*expr
,
1922 pet_function_summary
*summary
;
1923 const FunctionDecl
*def
;
1927 if (!fd
->hasBody(def
))
1930 fd
= const_cast<FunctionDecl
*>(def
);
1932 summary
= get_summary(fd
);
1934 expr
= pet_expr_call_set_summary(expr
, summary
);
1939 /* Extract a pet_scop from "tree".
1941 * We simply call pet_scop_from_pet_tree with the appropriate arguments and
1942 * then add pet_arrays for all accessed arrays.
1943 * We populate the pet_context with assignments for all parameters used
1944 * inside "tree" or any of the size expressions for the arrays accessed
1945 * by "tree" so that they can be used in affine expressions.
1947 struct pet_scop
*PetScan::extract_scop(__isl_take pet_tree
*tree
)
1954 int_size
= ast_context
.getTypeInfo(ast_context
.IntTy
).first
/ 8;
1956 domain
= isl_set_universe(isl_space_set_alloc(ctx
, 0, 0));
1957 pc
= pet_context_alloc(domain
);
1958 pc
= pet_context_add_parameters(pc
, tree
, &::get_array_size
, this);
1959 scop
= pet_scop_from_pet_tree(tree
, int_size
,
1960 &::extract_array
, this, pc
);
1961 scop
= scan_arrays(scop
, pc
);
1962 pet_context_free(pc
);
1967 /* Check if the scop marked by the user is exactly this Stmt
1968 * or part of this Stmt.
1969 * If so, return a pet_scop corresponding to the marked region.
1970 * Otherwise, return NULL.
1972 struct pet_scop
*PetScan::scan(Stmt
*stmt
)
1974 SourceManager
&SM
= PP
.getSourceManager();
1975 unsigned start_off
, end_off
;
1977 start_off
= getExpansionOffset(SM
, stmt
->getLocStart());
1978 end_off
= getExpansionOffset(SM
, stmt
->getLocEnd());
1980 if (start_off
> loc
.end
)
1982 if (end_off
< loc
.start
)
1985 if (start_off
>= loc
.start
&& end_off
<= loc
.end
)
1986 return extract_scop(extract(stmt
));
1989 for (start
= stmt
->child_begin(); start
!= stmt
->child_end(); ++start
) {
1990 Stmt
*child
= *start
;
1993 start_off
= getExpansionOffset(SM
, child
->getLocStart());
1994 end_off
= getExpansionOffset(SM
, child
->getLocEnd());
1995 if (start_off
< loc
.start
&& end_off
>= loc
.end
)
1997 if (start_off
>= loc
.start
)
2002 for (end
= start
; end
!= stmt
->child_end(); ++end
) {
2004 start_off
= SM
.getFileOffset(child
->getLocStart());
2005 if (start_off
>= loc
.end
)
2009 return extract_scop(extract(StmtRange(start
, end
), false, false));
2012 /* Set the size of index "pos" of "array" to "size".
2013 * In particular, add a constraint of the form
2017 * to array->extent and a constraint of the form
2021 * to array->context.
2023 * The domain of "size" is assumed to be zero-dimensional.
2025 static struct pet_array
*update_size(struct pet_array
*array
, int pos
,
2026 __isl_take isl_pw_aff
*size
)
2039 valid
= isl_set_params(isl_pw_aff_nonneg_set(isl_pw_aff_copy(size
)));
2040 array
->context
= isl_set_intersect(array
->context
, valid
);
2042 dim
= isl_set_get_space(array
->extent
);
2043 aff
= isl_aff_zero_on_domain(isl_local_space_from_space(dim
));
2044 aff
= isl_aff_add_coefficient_si(aff
, isl_dim_in
, pos
, 1);
2045 univ
= isl_set_universe(isl_aff_get_domain_space(aff
));
2046 index
= isl_pw_aff_alloc(univ
, aff
);
2048 size
= isl_pw_aff_add_dims(size
, isl_dim_in
,
2049 isl_set_dim(array
->extent
, isl_dim_set
));
2050 id
= isl_set_get_tuple_id(array
->extent
);
2051 size
= isl_pw_aff_set_tuple_id(size
, isl_dim_in
, id
);
2052 bound
= isl_pw_aff_lt_set(index
, size
);
2054 array
->extent
= isl_set_intersect(array
->extent
, bound
);
2056 if (!array
->context
|| !array
->extent
)
2057 return pet_array_free(array
);
2061 isl_pw_aff_free(size
);
2065 #ifdef HAVE_DECAYEDTYPE
2067 /* If "type" is a decayed type, then set *decayed to true and
2068 * return the original type.
2070 static const Type
*undecay(const Type
*type
, bool *decayed
)
2072 *decayed
= isa
<DecayedType
>(type
);
2074 type
= cast
<DecayedType
>(type
)->getOriginalType().getTypePtr();
2080 /* If "type" is a decayed type, then set *decayed to true and
2081 * return the original type.
2082 * Since this version of clang does not define a DecayedType,
2083 * we cannot obtain the original type even if it had been decayed and
2084 * we set *decayed to false.
2086 static const Type
*undecay(const Type
*type
, bool *decayed
)
2094 /* Figure out the size of the array at position "pos" and all
2095 * subsequent positions from "type" and update the corresponding
2096 * argument of "expr" accordingly.
2098 * The initial type (when pos is zero) may be a pointer type decayed
2099 * from an array type, if this initial type is the type of a function
2100 * argument. This only happens if the original array type has
2101 * a constant size in the outer dimension as otherwise we get
2102 * a VariableArrayType. Try and obtain this original type (if available) and
2103 * take the outer array size into account if it was marked static.
2105 __isl_give pet_expr
*PetScan::set_upper_bounds(__isl_take pet_expr
*expr
,
2106 const Type
*type
, int pos
)
2108 const ArrayType
*atype
;
2110 bool decayed
= false;
2116 type
= undecay(type
, &decayed
);
2118 if (type
->isPointerType()) {
2119 type
= type
->getPointeeType().getTypePtr();
2120 return set_upper_bounds(expr
, type
, pos
+ 1);
2122 if (!type
->isArrayType())
2125 type
= type
->getCanonicalTypeInternal().getTypePtr();
2126 atype
= cast
<ArrayType
>(type
);
2128 if (decayed
&& atype
->getSizeModifier() != ArrayType::Static
) {
2129 type
= atype
->getElementType().getTypePtr();
2130 return set_upper_bounds(expr
, type
, pos
+ 1);
2133 if (type
->isConstantArrayType()) {
2134 const ConstantArrayType
*ca
= cast
<ConstantArrayType
>(atype
);
2135 size
= extract_expr(ca
->getSize());
2136 expr
= pet_expr_set_arg(expr
, pos
, size
);
2137 } else if (type
->isVariableArrayType()) {
2138 const VariableArrayType
*vla
= cast
<VariableArrayType
>(atype
);
2139 size
= extract_expr(vla
->getSizeExpr());
2140 expr
= pet_expr_set_arg(expr
, pos
, size
);
2143 type
= atype
->getElementType().getTypePtr();
2145 return set_upper_bounds(expr
, type
, pos
+ 1);
2148 /* Construct a pet_expr that holds the sizes of an array of the given type.
2149 * The returned expression is a call expression with as arguments
2150 * the sizes in each dimension. If we are unable to derive the size
2151 * in a given dimension, then the corresponding argument is set to infinity.
2152 * In fact, we initialize all arguments to infinity and then update
2153 * them if we are able to figure out the size.
2155 * The result is stored in the type_size cache so that we can reuse
2156 * it if this method gets called on the same type again later on.
2158 __isl_give pet_expr
*PetScan::get_array_size(const Type
*type
)
2161 pet_expr
*expr
, *inf
;
2163 if (type_size
.find(type
) != type_size
.end())
2164 return pet_expr_copy(type_size
[type
]);
2166 depth
= array_depth(type
);
2167 inf
= pet_expr_new_int(isl_val_infty(ctx
));
2168 expr
= pet_expr_new_call(ctx
, "bounds", depth
);
2169 for (int i
= 0; i
< depth
; ++i
)
2170 expr
= pet_expr_set_arg(expr
, i
, pet_expr_copy(inf
));
2173 expr
= set_upper_bounds(expr
, type
, 0);
2174 type_size
[type
] = pet_expr_copy(expr
);
2179 /* Does "expr" represent the "integer" infinity?
2181 static int is_infty(__isl_keep pet_expr
*expr
)
2186 if (pet_expr_get_type(expr
) != pet_expr_int
)
2188 v
= pet_expr_int_get_val(expr
);
2189 res
= isl_val_is_infty(v
);
2195 /* Figure out the dimensions of an array "array" based on its type
2196 * "type" and update "array" accordingly.
2198 * We first construct a pet_expr that holds the sizes of the array
2199 * in each dimension. The resulting expression may containing
2200 * infinity values for dimension where we are unable to derive
2201 * a size expression.
2203 * The arguments of the size expression that have a value different from
2204 * infinity are then converted to an affine expression
2205 * within the context "pc" and incorporated into the size of "array".
2206 * If we are unable to convert a size expression to an affine expression or
2207 * if the size is not a (symbolic) constant,
2208 * then we leave the corresponding size of "array" untouched.
2210 struct pet_array
*PetScan::set_upper_bounds(struct pet_array
*array
,
2211 const Type
*type
, __isl_keep pet_context
*pc
)
2219 expr
= get_array_size(type
);
2221 n
= pet_expr_get_n_arg(expr
);
2222 for (int i
= 0; i
< n
; ++i
) {
2226 arg
= pet_expr_get_arg(expr
, i
);
2227 if (!is_infty(arg
)) {
2230 size
= pet_expr_extract_affine(arg
, pc
);
2231 dim
= isl_pw_aff_dim(size
, isl_dim_in
);
2233 array
= pet_array_free(array
);
2234 else if (isl_pw_aff_involves_nan(size
) ||
2235 isl_pw_aff_involves_dims(size
, isl_dim_in
, 0, dim
))
2236 isl_pw_aff_free(size
);
2238 size
= isl_pw_aff_drop_dims(size
,
2239 isl_dim_in
, 0, dim
);
2240 array
= update_size(array
, i
, size
);
2245 pet_expr_free(expr
);
2250 /* Does "decl" have definition that we can keep track of in a pet_type?
2252 static bool has_printable_definition(RecordDecl
*decl
)
2254 if (!decl
->getDeclName())
2256 return decl
->getLexicalDeclContext() == decl
->getDeclContext();
2259 /* Construct and return a pet_array corresponding to the variable "decl".
2260 * In particular, initialize array->extent to
2262 * { name[i_1,...,i_d] : i_1,...,i_d >= 0 }
2264 * and then call set_upper_bounds to set the upper bounds on the indices
2265 * based on the type of the variable. The upper bounds are converted
2266 * to affine expressions within the context "pc".
2268 * If the base type is that of a record with a top-level definition and
2269 * if "types" is not null, then the RecordDecl corresponding to the type
2270 * is added to "types".
2272 * If the base type is that of a record with no top-level definition,
2273 * then we replace it by "<subfield>".
2275 struct pet_array
*PetScan::extract_array(isl_ctx
*ctx
, ValueDecl
*decl
,
2276 lex_recorddecl_set
*types
, __isl_keep pet_context
*pc
)
2278 struct pet_array
*array
;
2279 QualType qt
= get_array_type(decl
);
2280 const Type
*type
= qt
.getTypePtr();
2281 int depth
= array_depth(type
);
2282 QualType base
= pet_clang_base_type(qt
);
2287 array
= isl_calloc_type(ctx
, struct pet_array
);
2291 id
= create_decl_id(ctx
, decl
);
2292 dim
= isl_space_set_alloc(ctx
, 0, depth
);
2293 dim
= isl_space_set_tuple_id(dim
, isl_dim_set
, id
);
2295 array
->extent
= isl_set_nat_universe(dim
);
2297 dim
= isl_space_params_alloc(ctx
, 0);
2298 array
->context
= isl_set_universe(dim
);
2300 array
= set_upper_bounds(array
, type
, pc
);
2304 name
= base
.getAsString();
2306 if (types
&& base
->isRecordType()) {
2307 RecordDecl
*decl
= pet_clang_record_decl(base
);
2308 if (has_printable_definition(decl
))
2309 types
->insert(decl
);
2311 name
= "<subfield>";
2314 array
->element_type
= strdup(name
.c_str());
2315 array
->element_is_record
= base
->isRecordType();
2316 array
->element_size
= decl
->getASTContext().getTypeInfo(base
).first
/ 8;
2321 /* Construct and return a pet_array corresponding to the sequence
2322 * of declarations "decls".
2323 * The upper bounds of the array are converted to affine expressions
2324 * within the context "pc".
2325 * If the sequence contains a single declaration, then it corresponds
2326 * to a simple array access. Otherwise, it corresponds to a member access,
2327 * with the declaration for the substructure following that of the containing
2328 * structure in the sequence of declarations.
2329 * We start with the outermost substructure and then combine it with
2330 * information from the inner structures.
2332 * Additionally, keep track of all required types in "types".
2334 struct pet_array
*PetScan::extract_array(isl_ctx
*ctx
,
2335 vector
<ValueDecl
*> decls
, lex_recorddecl_set
*types
,
2336 __isl_keep pet_context
*pc
)
2338 struct pet_array
*array
;
2339 vector
<ValueDecl
*>::iterator it
;
2343 array
= extract_array(ctx
, *it
, types
, pc
);
2345 for (++it
; it
!= decls
.end(); ++it
) {
2346 struct pet_array
*parent
;
2347 const char *base_name
, *field_name
;
2351 array
= extract_array(ctx
, *it
, types
, pc
);
2353 return pet_array_free(parent
);
2355 base_name
= isl_set_get_tuple_name(parent
->extent
);
2356 field_name
= isl_set_get_tuple_name(array
->extent
);
2357 product_name
= pet_array_member_access_name(ctx
,
2358 base_name
, field_name
);
2360 array
->extent
= isl_set_product(isl_set_copy(parent
->extent
),
2363 array
->extent
= isl_set_set_tuple_name(array
->extent
,
2365 array
->context
= isl_set_intersect(array
->context
,
2366 isl_set_copy(parent
->context
));
2368 pet_array_free(parent
);
2371 if (!array
->extent
|| !array
->context
|| !product_name
)
2372 return pet_array_free(array
);
2378 /* Add a pet_type corresponding to "decl" to "scop, provided
2379 * it is a member of "types" and it has not been added before
2380 * (i.e., it is not a member of "types_done".
2382 * Since we want the user to be able to print the types
2383 * in the order in which they appear in the scop, we need to
2384 * make sure that types of fields in a structure appear before
2385 * that structure. We therefore call ourselves recursively
2386 * on the types of all record subfields.
2388 static struct pet_scop
*add_type(isl_ctx
*ctx
, struct pet_scop
*scop
,
2389 RecordDecl
*decl
, Preprocessor
&PP
, lex_recorddecl_set
&types
,
2390 lex_recorddecl_set
&types_done
)
2393 llvm::raw_string_ostream
S(s
);
2394 RecordDecl::field_iterator it
;
2396 if (types
.find(decl
) == types
.end())
2398 if (types_done
.find(decl
) != types_done
.end())
2401 for (it
= decl
->field_begin(); it
!= decl
->field_end(); ++it
) {
2403 QualType type
= it
->getType();
2405 if (!type
->isRecordType())
2407 record
= pet_clang_record_decl(type
);
2408 scop
= add_type(ctx
, scop
, record
, PP
, types
, types_done
);
2411 if (strlen(decl
->getName().str().c_str()) == 0)
2414 decl
->print(S
, PrintingPolicy(PP
.getLangOpts()));
2417 scop
->types
[scop
->n_type
] = pet_type_alloc(ctx
,
2418 decl
->getName().str().c_str(), s
.c_str());
2419 if (!scop
->types
[scop
->n_type
])
2420 return pet_scop_free(scop
);
2422 types_done
.insert(decl
);
2429 /* Construct a list of pet_arrays, one for each array (or scalar)
2430 * accessed inside "scop", add this list to "scop" and return the result.
2431 * The upper bounds of the arrays are converted to affine expressions
2432 * within the context "pc".
2434 * The context of "scop" is updated with the intersection of
2435 * the contexts of all arrays, i.e., constraints on the parameters
2436 * that ensure that the arrays have a valid (non-negative) size.
2438 * If the any of the extracted arrays refers to a member access,
2439 * then also add the required types to "scop".
2441 struct pet_scop
*PetScan::scan_arrays(struct pet_scop
*scop
,
2442 __isl_keep pet_context
*pc
)
2445 array_desc_set arrays
;
2446 array_desc_set::iterator it
;
2447 lex_recorddecl_set types
;
2448 lex_recorddecl_set types_done
;
2449 lex_recorddecl_set::iterator types_it
;
2451 struct pet_array
**scop_arrays
;
2456 pet_scop_collect_arrays(scop
, arrays
);
2457 if (arrays
.size() == 0)
2460 n_array
= scop
->n_array
;
2462 scop_arrays
= isl_realloc_array(ctx
, scop
->arrays
, struct pet_array
*,
2463 n_array
+ arrays
.size());
2466 scop
->arrays
= scop_arrays
;
2468 for (it
= arrays
.begin(), i
= 0; it
!= arrays
.end(); ++it
, ++i
) {
2469 struct pet_array
*array
;
2470 array
= extract_array(ctx
, *it
, &types
, pc
);
2471 scop
->arrays
[n_array
+ i
] = array
;
2472 if (!scop
->arrays
[n_array
+ i
])
2475 scop
->context
= isl_set_intersect(scop
->context
,
2476 isl_set_copy(array
->context
));
2481 if (types
.size() == 0)
2484 scop
->types
= isl_alloc_array(ctx
, struct pet_type
*, types
.size());
2488 for (types_it
= types
.begin(); types_it
!= types
.end(); ++types_it
)
2489 scop
= add_type(ctx
, scop
, *types_it
, PP
, types
, types_done
);
2493 pet_scop_free(scop
);
2497 /* Bound all parameters in scop->context to the possible values
2498 * of the corresponding C variable.
2500 static struct pet_scop
*add_parameter_bounds(struct pet_scop
*scop
)
2507 n
= isl_set_dim(scop
->context
, isl_dim_param
);
2508 for (int i
= 0; i
< n
; ++i
) {
2512 id
= isl_set_get_dim_id(scop
->context
, isl_dim_param
, i
);
2513 if (pet_nested_in_id(id
)) {
2515 isl_die(isl_set_get_ctx(scop
->context
),
2517 "unresolved nested parameter", goto error
);
2519 decl
= (ValueDecl
*) isl_id_get_user(id
);
2522 scop
->context
= set_parameter_bounds(scop
->context
, i
, decl
);
2530 pet_scop_free(scop
);
2534 /* Construct a pet_scop from the given function.
2536 * If the scop was delimited by scop and endscop pragmas, then we override
2537 * the file offsets by those derived from the pragmas.
2539 struct pet_scop
*PetScan::scan(FunctionDecl
*fd
)
2544 stmt
= fd
->getBody();
2546 if (options
->autodetect
) {
2547 set_current_stmt(stmt
);
2548 scop
= extract_scop(extract(stmt
, true));
2550 current_line
= loc
.start_line
;
2552 scop
= pet_scop_update_start_end(scop
, loc
.start
, loc
.end
);
2554 scop
= add_parameter_bounds(scop
);
2555 scop
= pet_scop_gist(scop
, value_bounds
);
2560 /* Update this->last_line and this->current_line based on the fact
2561 * that we are about to consider "stmt".
2563 void PetScan::set_current_stmt(Stmt
*stmt
)
2565 SourceLocation loc
= stmt
->getLocStart();
2566 SourceManager
&SM
= PP
.getSourceManager();
2568 last_line
= current_line
;
2569 current_line
= SM
.getExpansionLineNumber(loc
);
2572 /* Is the current statement marked by an independent pragma?
2573 * That is, is there an independent pragma on a line between
2574 * the line of the current statement and the line of the previous statement.
2575 * The search is not implemented very efficiently. We currently
2576 * assume that there are only a few independent pragmas, if any.
2578 bool PetScan::is_current_stmt_marked_independent()
2580 for (int i
= 0; i
< independent
.size(); ++i
) {
2581 unsigned line
= independent
[i
].line
;
2583 if (last_line
< line
&& line
< current_line
)