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jit: Support opaque pointers in LLVM 16.

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Remove use of LLVMGetElementType() and provide the type of all pointers
to LLVMBuildXXX() functions when emitting IR, as required by modern LLVM
versions[1].

 * For LLVM <= 14, we'll still use the old LLVMBuildXXX() functions.
 * For LLVM == 15, we'll continue to do the same, explicitly opting
   out of opaque pointer mode.
 * For LLVM >= 16, we'll use the new LLVMBuildXXX2() functions that take
   the extra type argument.

The difference is hidden behind some new IR emitting wrapper functions
l_load(), l_gep(), l_call() etc.  The change is mostly mechanical,
except that at each site the correct type had to be provided.

In some places we needed to do some extra work to get functions types,
including some new wrappers for C++ APIs that are not yet exposed by in
LLVM's C API, and some new "example" functions in llvmjit_types.c
because it's no longer possible to start from the function pointer type
and ask for the function type.

Back-patch to 12, because it's a little tricker in 11 and we agreed not
to put the latest LLVM support into the upcoming final release of 11.

[1] https://llvm.org/docs/OpaquePointers.html

Reviewed-by: Dmitry Dolgov <9erthalion6@gmail.com>
Reviewed-by: Ronan Dunklau <ronan.dunklau@aiven.io>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA%2BhUKGKNX_%3Df%2B1C4r06WETKTq0G4Z_7q4L4Fxn5WWpMycDj9Fw%40mail.gmail.com
This commit is contained in:
Thomas Munro
2023-10-18 22:09:05 +13:00
parent c4e561c1e0
commit eed1feb3fe
7 changed files with 476 additions and 261 deletions
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7
src/include/jit/llvmjit.h
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@ -67,6 +67,8 @@ extern PGDLLIMPORT LLVMTypeRef TypeStorageBool;
extern PGDLLIMPORT LLVMTypeRef StructNullableDatum;
extern PGDLLIMPORT LLVMTypeRef StructTupleDescData;
extern PGDLLIMPORT LLVMTypeRef StructHeapTupleData;
extern PGDLLIMPORT LLVMTypeRef StructHeapTupleHeaderData;
extern PGDLLIMPORT LLVMTypeRef StructMinimalTupleData;
extern PGDLLIMPORT LLVMTypeRef StructTupleTableSlot;
extern PGDLLIMPORT LLVMTypeRef StructHeapTupleTableSlot;
extern PGDLLIMPORT LLVMTypeRef StructMinimalTupleTableSlot;
@ -78,8 +80,11 @@ extern PGDLLIMPORT LLVMTypeRef StructExprState;
extern PGDLLIMPORT LLVMTypeRef StructAggState;
extern PGDLLIMPORT LLVMTypeRef StructAggStatePerTransData;
extern PGDLLIMPORT LLVMTypeRef StructAggStatePerGroupData;
extern PGDLLIMPORT LLVMTypeRef StructPlanState;
extern PGDLLIMPORT LLVMValueRef AttributeTemplate;
extern PGDLLIMPORT LLVMValueRef ExecEvalBoolSubroutineTemplate;
extern PGDLLIMPORT LLVMValueRef ExecEvalSubroutineTemplate;
extern void llvm_enter_fatal_on_oom(void);
@ -133,6 +138,8 @@ extern char *LLVMGetHostCPUFeatures(void);
#endif
extern unsigned LLVMGetAttributeCountAtIndexPG(LLVMValueRef F, uint32 Idx);
extern LLVMTypeRef LLVMGetFunctionReturnType(LLVMValueRef r);
extern LLVMTypeRef LLVMGetFunctionType(LLVMValueRef r);
#ifdef __cplusplus
} /* extern "C" */