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b2e0977886
Commit 37d5babb used this C API function while adding support for LLVM 16 and opaque pointers, but it's not available in LLVM 7 and older. Provide it in our own llvmjit_wrap.cpp. It just calls a C++ function that pre-dates LLVM 3.9, our minimum target. Back-patch to 12, like 37d5babb. Discussion: https://postgr.es/m/CA%2BhUKGKnLnJnWrkr%3D4mSGhE5FuTK55FY15uULR7%3Dzzc%3DwX4Nqw%40mail.gmail.com
99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
/*-------------------------------------------------------------------------
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*
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* llvmjit_wrap.cpp
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* Parts of the LLVM interface not (yet) exposed to C.
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*
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* Copyright (c) 2016-2022, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/backend/lib/llvm/llvmjit_wrap.cpp
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*
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*-------------------------------------------------------------------------
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*/
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extern "C"
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{
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#include "postgres.h"
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}
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#include <llvm-c/Core.h>
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/* Avoid macro clash with LLVM's C++ headers */
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#undef Min
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#include <llvm/IR/Attributes.h>
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#include <llvm/IR/Function.h>
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#include <llvm/MC/SubtargetFeature.h>
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#include <llvm/Support/Host.h>
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#include "jit/llvmjit.h"
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/*
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* C-API extensions.
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*/
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#if defined(HAVE_DECL_LLVMGETHOSTCPUNAME) && !HAVE_DECL_LLVMGETHOSTCPUNAME
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char *LLVMGetHostCPUName(void) {
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return strdup(llvm::sys::getHostCPUName().data());
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}
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#endif
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#if defined(HAVE_DECL_LLVMGETHOSTCPUFEATURES) && !HAVE_DECL_LLVMGETHOSTCPUFEATURES
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char *LLVMGetHostCPUFeatures(void) {
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llvm::SubtargetFeatures Features;
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llvm::StringMap<bool> HostFeatures;
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if (llvm::sys::getHostCPUFeatures(HostFeatures))
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for (auto &F : HostFeatures)
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Features.AddFeature(F.first(), F.second);
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return strdup(Features.getString().c_str());
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}
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#endif
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/*
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* Like LLVM's LLVMGetAttributeCountAtIndex(), works around a bug in LLVM 3.9.
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*
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* In LLVM <= 3.9, LLVMGetAttributeCountAtIndex() segfaults if there are no
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* attributes at an index (fixed in LLVM commit ce9bb1097dc2).
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*/
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unsigned
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LLVMGetAttributeCountAtIndexPG(LLVMValueRef F, uint32 Idx)
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{
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/*
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* This is more expensive, so only do when using a problematic LLVM
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* version.
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*/
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#if LLVM_VERSION_MAJOR < 4
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if (!llvm::unwrap<llvm::Function>(F)->getAttributes().hasAttributes(Idx))
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return 0;
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#endif
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/*
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* There is no nice public API to determine the count nicely, so just
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* always fall back to LLVM's C API.
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*/
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return LLVMGetAttributeCountAtIndex(F, Idx);
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}
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LLVMTypeRef
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LLVMGetFunctionReturnType(LLVMValueRef r)
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{
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return llvm::wrap(llvm::unwrap<llvm::Function>(r)->getReturnType());
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}
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LLVMTypeRef
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LLVMGetFunctionType(LLVMValueRef r)
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{
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return llvm::wrap(llvm::unwrap<llvm::Function>(r)->getFunctionType());
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}
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#if LLVM_VERSION_MAJOR < 8
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LLVMTypeRef
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LLVMGlobalGetValueType(LLVMValueRef g)
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{
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return llvm::wrap(llvm::unwrap<llvm::GlobalValue>(g)->getValueType());
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}
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#endif
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