src/backend/jit/llvm/llvmjit_types.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * llvmjit_types.c
   4  *        List of types needed by JIT emitting code.
   5  *
   6  * JIT emitting code often needs to access struct elements, create functions
   7  * with the correct signature etc. To allow synchronizing these types with a
   8  * low chance of definitions getting out of sync, this file lists types and
   9  * functions that directly need to be accessed from LLVM.
  10  *
  11  * When LLVM is first used in a backend, a bitcode version of this file will
  12  * be loaded. The needed types and signatures will be stored into Struct*,
  13  * Type*, Func* variables.
  14  *
  15  * NB: This file will not be linked into the server, it's just converted to
  16  * bitcode.
  17  *
  18  *
  19  * Copyright (c) 2016-2022, PostgreSQL Global Development Group
  20  *
  21  * IDENTIFICATION
  22  *        src/backend/jit/llvm/llvmjit_types.c
  23  *
  24  *-------------------------------------------------------------------------
  25  */
  26
  27 #include "postgres.h"
  28
  29 #include "access/htup.h"
  30 #include "access/htup_details.h"
  31 #include "access/tupdesc.h"
  32 #include "catalog/pg_attribute.h"
  33 #include "executor/execExpr.h"
  34 #include "executor/nodeAgg.h"
  35 #include "executor/tuptable.h"
  36 #include "fmgr.h"
  37 #include "nodes/execnodes.h"
  38 #include "nodes/memnodes.h"
  39 #include "utils/expandeddatum.h"
  40 #include "utils/palloc.h"
  41
  42
  43 /*
  44  * List of types needed for JITing. These have to be non-static, otherwise
  45  * clang/LLVM will omit them.  As this file will never be linked into
  46  * anything, that's harmless.
  47  */
  48 PGFunction      TypePGFunction;
  49 size_t          TypeSizeT;
  50 bool            TypeStorageBool;
  51 ExprStateEvalFunc TypeExprStateEvalFunc;
  52 ExecEvalSubroutine TypeExecEvalSubroutine;
  53 ExecEvalBoolSubroutine TypeExecEvalBoolSubroutine;
  54
  55 NullableDatum StructNullableDatum;
  56 AggState        StructAggState;
  57 AggStatePerGroupData StructAggStatePerGroupData;
  58 AggStatePerTransData StructAggStatePerTransData;
  59 ExprContext StructExprContext;
  60 ExprEvalStep StructExprEvalStep;
  61 ExprState       StructExprState;
  62 FunctionCallInfoBaseData StructFunctionCallInfoData;
  63 HeapTupleData StructHeapTupleData;
  64 MemoryContextData StructMemoryContextData;
  65 TupleTableSlot StructTupleTableSlot;
  66 HeapTupleTableSlot StructHeapTupleTableSlot;
  67 MinimalTupleTableSlot StructMinimalTupleTableSlot;
  68 TupleDescData StructTupleDescData;
  69
  70
  71 /*
  72  * To determine which attributes functions need to have (depends e.g. on
  73  * compiler version and settings) to be compatible for inlining, we simply
  74  * copy the attributes of this function.
  75  */
  76 extern Datum AttributeTemplate(PG_FUNCTION_ARGS);
  77 Datum
  78 AttributeTemplate(PG_FUNCTION_ARGS)
  79 {
  80         PG_RETURN_NULL();
  81 }
  82
  83 /*
  84  * Clang represents stdbool.h style booleans that are returned by functions
  85  * differently (as i1) than stored ones (as i8). Therefore we do not just need
  86  * TypeBool (above), but also a way to determine the width of a returned
  87  * integer. This allows us to keep compatible with non-stdbool using
  88  * architectures.
  89  */
  90 extern bool FunctionReturningBool(void);
  91 bool
  92 FunctionReturningBool(void)
  93 {
  94         return false;
  95 }
  96
  97 /*
  98  * To force signatures of functions used during JITing to be present,
  99  * reference the functions required. This again has to be non-static, to avoid
 100  * being removed as unnecessary.
 101  */
 102 void       *referenced_functions[] =
 103 {
 104         ExecAggInitGroup,
 105         ExecAggTransReparent,
 106         ExecEvalAggOrderedTransDatum,
 107         ExecEvalAggOrderedTransTuple,
 108         ExecEvalArrayCoerce,
 109         ExecEvalArrayExpr,
 110         ExecEvalConstraintCheck,
 111         ExecEvalConstraintNotNull,
 112         ExecEvalConvertRowtype,
 113         ExecEvalCurrentOfExpr,
 114         ExecEvalFieldSelect,
 115         ExecEvalFieldStoreDeForm,
 116         ExecEvalFieldStoreForm,
 117         ExecEvalFuncExprFusage,
 118         ExecEvalFuncExprStrictFusage,
 119         ExecEvalGroupingFunc,
 120         ExecEvalMinMax,
 121         ExecEvalNextValueExpr,
 122         ExecEvalParamExec,
 123         ExecEvalParamExtern,
 124         ExecEvalRow,
 125         ExecEvalRowNotNull,
 126         ExecEvalRowNull,
 127         ExecEvalSQLValueFunction,
 128         ExecEvalScalarArrayOp,
 129         ExecEvalHashedScalarArrayOp,
 130         ExecEvalSubPlan,
 131         ExecEvalSysVar,
 132         ExecEvalWholeRowVar,
 133         ExecEvalXmlExpr,
 134         MakeExpandedObjectReadOnlyInternal,
 135         slot_getmissingattrs,
 136         slot_getsomeattrs_int,
 137         strlen,
 138         varsize_any,
 139 };