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jit: Require at least LLVM 10.

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Remove support for older LLVM versions.  The default on common software
distributions will be at least LLVM 10 when PostgreSQL 17 ships.

Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/CA%2BhUKGLhNs5geZaVNj2EJ79Dx9W8fyWUU3HxcpZy55sMGcY%3DiA%40mail.gmail.com
This commit is contained in:
Thomas Munro
2024-01-25 15:23:04 +13:00
parent 729439607a
commit 820b5af73d
11 changed files with 17 additions and 243 deletions
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61
src/backend/jit/llvm/llvmjit_wrap.cpp
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@@ -21,16 +21,7 @@ extern "C"
/* Avoid macro clash with LLVM's C++ headers */
#undef Min
#include <llvm/IR/Attributes.h>
#include <llvm/IR/Function.h>
#if LLVM_VERSION_MAJOR < 17
#include <llvm/MC/SubtargetFeature.h>
#endif
#if LLVM_VERSION_MAJOR > 16
#include <llvm/TargetParser/Host.h>
#else
#include <llvm/Support/Host.h>
#endif
#include "jit/llvmjit.h"
@@ -38,50 +29,6 @@ extern "C"
/*
* C-API extensions.
*/
#if defined(HAVE_DECL_LLVMGETHOSTCPUNAME) && !HAVE_DECL_LLVMGETHOSTCPUNAME
char *LLVMGetHostCPUName(void) {
return strdup(llvm::sys::getHostCPUName().data());
}
#endif
#if defined(HAVE_DECL_LLVMGETHOSTCPUFEATURES) && !HAVE_DECL_LLVMGETHOSTCPUFEATURES
char *LLVMGetHostCPUFeatures(void) {
llvm::SubtargetFeatures Features;
llvm::StringMap<bool> HostFeatures;
if (llvm::sys::getHostCPUFeatures(HostFeatures))
for (auto &F : HostFeatures)
Features.AddFeature(F.first(), F.second);
return strdup(Features.getString().c_str());
}
#endif
/*
* Like LLVM's LLVMGetAttributeCountAtIndex(), works around a bug in LLVM 3.9.
*
* In LLVM <= 3.9, LLVMGetAttributeCountAtIndex() segfaults if there are no
* attributes at an index (fixed in LLVM commit ce9bb1097dc2).
*/
unsigned
LLVMGetAttributeCountAtIndexPG(LLVMValueRef F, uint32 Idx)
{
/*
* This is more expensive, so only do when using a problematic LLVM
* version.
*/
#if LLVM_VERSION_MAJOR < 4
if (!llvm::unwrap<llvm::Function>(F)->getAttributes().hasAttributes(Idx))
return 0;
#endif
/*
* There is no nice public API to determine the count nicely, so just
* always fall back to LLVM's C API.
*/
return LLVMGetAttributeCountAtIndex(F, Idx);
}
LLVMTypeRef
LLVMGetFunctionReturnType(LLVMValueRef r)
@@ -94,11 +41,3 @@ LLVMGetFunctionType(LLVMValueRef r)
{
return llvm::wrap(llvm::unwrap<llvm::Function>(r)->getFunctionType());
}
#if LLVM_VERSION_MAJOR < 8
LLVMTypeRef
LLVMGlobalGetValueType(LLVMValueRef g)
{
return llvm::wrap(llvm::unwrap<llvm::GlobalValue>(g)->getValueType());
}
#endif