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e728c537a2
Remove the ModuleLevelChanges argument, and the ability to create new subprograms for cloned functions. The latter was added without review in r203662, but it has no in-tree clients (all non-test callers pass false for ModuleLevelChanges [1], so it isn't reachable outside of tests). It also isn't clear that adding a duplicate subprogram to the compile unit is always the right thing to do when cloning a function within a module. If this functionality comes back it should be accompanied with a more concrete use case. Furthermore, all in-tree clients add the returned function to the module. Since that's pretty much the only sensible thing you can do with the function, just do that in CloneFunction. [1] http://llvm-cs.pcc.me.uk/lib/Transforms/Utils/CloneFunction.cpp/rCloneFunction Differential Revision: http://reviews.llvm.org/D18628 llvm-svn: 269110
64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
//===-- AMDGPUAlwaysInlinePass.cpp - Promote Allocas ----------------------===//
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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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/// \file
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/// This pass marks all internal functions as always_inline and creates
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/// duplicates of all other functions a marks the duplicates as always_inline.
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//
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//===----------------------------------------------------------------------===//
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#include "AMDGPU.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Transforms/Utils/Cloning.h"
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using namespace llvm;
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namespace {
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class AMDGPUAlwaysInline : public ModulePass {
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static char ID;
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public:
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AMDGPUAlwaysInline() : ModulePass(ID) { }
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bool runOnModule(Module &M) override;
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const char *getPassName() const override { return "AMDGPU Always Inline Pass"; }
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};
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} // End anonymous namespace
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char AMDGPUAlwaysInline::ID = 0;
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bool AMDGPUAlwaysInline::runOnModule(Module &M) {
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std::vector<Function *> FuncsToClone;
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for (Function &F : M) {
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if (!F.hasLocalLinkage() && !F.isDeclaration() && !F.use_empty() &&
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!F.hasFnAttribute(Attribute::NoInline))
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FuncsToClone.push_back(&F);
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}
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for (Function *F : FuncsToClone) {
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ValueToValueMapTy VMap;
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Function *NewFunc = CloneFunction(F, VMap);
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NewFunc->setLinkage(GlobalValue::InternalLinkage);
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F->replaceAllUsesWith(NewFunc);
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}
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for (Function &F : M) {
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if (F.hasLocalLinkage() && !F.hasFnAttribute(Attribute::NoInline)) {
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F.addFnAttr(Attribute::AlwaysInline);
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}
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}
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return false;
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}
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ModulePass *llvm::createAMDGPUAlwaysInlinePass() {
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return new AMDGPUAlwaysInline();
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}
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