jit: Require at least LLVM 10.

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

1 files changed, 0 insertions, 61 deletions

diff --git a/src/backend/jit/llvm/llvmjit_wrap.cpp b/src/backend/jit/llvm/llvmjit_wrap.cpp
index 878f8edf55c..641c8841ca3 100644
--- a/src/backend/jit/llvm/llvmjit_wrap.cpp
+++ b/src/backend/jit/llvm/llvmjit_wrap.cpp
@@ -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