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Previously, subprograms contained a metadata reference to the function they described. Because most clients need to get or set a subprogram for a given function rather than the other way around, this created unneeded inefficiency. For example, many passes needed to call the function llvm::makeSubprogramMap() to build a mapping from functions to subprograms, and the IR linker needed to fix up function references in a way that caused quadratic complexity in the IR linking phase of LTO. This change reverses the direction of the edge by storing the subprogram as function-level metadata and removing DISubprogram's function field. Since this is an IR change, a bitcode upgrade has been provided. Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is attached to the PR. Differential Revision: http://reviews.llvm.org/D14265 llvm-svn: 252219
105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
//===- IRBindings.cpp - Additional bindings for ir ------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines additional C bindings for the ir component.
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//
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//===----------------------------------------------------------------------===//
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#include "IRBindings.h"
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#include "llvm/IR/Attributes.h"
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#include "llvm/IR/DebugLoc.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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using namespace llvm;
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void LLVMAddFunctionAttr2(LLVMValueRef Fn, uint64_t PA) {
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Function *Func = unwrap<Function>(Fn);
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const AttributeSet PAL = Func->getAttributes();
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AttrBuilder B(PA);
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const AttributeSet PALnew =
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PAL.addAttributes(Func->getContext(), AttributeSet::FunctionIndex,
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AttributeSet::get(Func->getContext(),
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AttributeSet::FunctionIndex, B));
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Func->setAttributes(PALnew);
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}
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uint64_t LLVMGetFunctionAttr2(LLVMValueRef Fn) {
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Function *Func = unwrap<Function>(Fn);
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const AttributeSet PAL = Func->getAttributes();
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return PAL.Raw(AttributeSet::FunctionIndex);
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}
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void LLVMRemoveFunctionAttr2(LLVMValueRef Fn, uint64_t PA) {
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Function *Func = unwrap<Function>(Fn);
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const AttributeSet PAL = Func->getAttributes();
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AttrBuilder B(PA);
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const AttributeSet PALnew =
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PAL.removeAttributes(Func->getContext(), AttributeSet::FunctionIndex,
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AttributeSet::get(Func->getContext(),
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AttributeSet::FunctionIndex, B));
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Func->setAttributes(PALnew);
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}
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LLVMMetadataRef LLVMConstantAsMetadata(LLVMValueRef C) {
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return wrap(ConstantAsMetadata::get(unwrap<Constant>(C)));
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}
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LLVMMetadataRef LLVMMDString2(LLVMContextRef C, const char *Str, unsigned SLen) {
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return wrap(MDString::get(*unwrap(C), StringRef(Str, SLen)));
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}
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LLVMMetadataRef LLVMMDNode2(LLVMContextRef C, LLVMMetadataRef *MDs,
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unsigned Count) {
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return wrap(
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MDNode::get(*unwrap(C), ArrayRef<Metadata *>(unwrap(MDs), Count)));
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}
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LLVMMetadataRef LLVMTemporaryMDNode(LLVMContextRef C, LLVMMetadataRef *MDs,
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unsigned Count) {
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return wrap(MDTuple::getTemporary(*unwrap(C),
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ArrayRef<Metadata *>(unwrap(MDs), Count))
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.release());
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}
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void LLVMAddNamedMetadataOperand2(LLVMModuleRef M, const char *name,
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LLVMMetadataRef Val) {
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NamedMDNode *N = unwrap(M)->getOrInsertNamedMetadata(name);
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if (!N)
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return;
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if (!Val)
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return;
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N->addOperand(unwrap<MDNode>(Val));
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}
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void LLVMSetMetadata2(LLVMValueRef Inst, unsigned KindID, LLVMMetadataRef MD) {
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MDNode *N = MD ? unwrap<MDNode>(MD) : nullptr;
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unwrap<Instruction>(Inst)->setMetadata(KindID, N);
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}
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void LLVMMetadataReplaceAllUsesWith(LLVMMetadataRef MD, LLVMMetadataRef New) {
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auto *Node = unwrap<MDNode>(MD);
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Node->replaceAllUsesWith(unwrap<Metadata>(New));
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MDNode::deleteTemporary(Node);
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}
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void LLVMSetCurrentDebugLocation2(LLVMBuilderRef Bref, unsigned Line,
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unsigned Col, LLVMMetadataRef Scope,
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LLVMMetadataRef InlinedAt) {
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unwrap(Bref)->SetCurrentDebugLocation(
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DebugLoc::get(Line, Col, Scope ? unwrap<MDNode>(Scope) : nullptr,
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InlinedAt ? unwrap<MDNode>(InlinedAt) : nullptr));
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}
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void LLVMSetSubprogram(LLVMValueRef Func, LLVMMetadataRef SP) {
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unwrap<Function>(Func)->setSubprogram(unwrap<DISubprogram>(SP));
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}
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