forked from OSchip/llvm-project
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
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//===-- AMDGPUCodeGenPrepare.cpp ------------------------------------------===//
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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 does misc. AMDGPU optimizations on IR before instruction
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/// selection.
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//
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//===----------------------------------------------------------------------===//
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#include "AMDGPU.h"
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#include "AMDGPUSubtarget.h"
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#include "llvm/Analysis/DivergenceAnalysis.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/IR/InstVisitor.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#define DEBUG_TYPE "amdgpu-codegenprepare"
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using namespace llvm;
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namespace {
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class AMDGPUCodeGenPrepare : public FunctionPass,
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public InstVisitor<AMDGPUCodeGenPrepare> {
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DivergenceAnalysis *DA;
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const TargetMachine *TM;
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public:
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static char ID;
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AMDGPUCodeGenPrepare(const TargetMachine *TM = nullptr) :
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FunctionPass(ID),
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TM(TM) { }
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bool doInitialization(Module &M) override;
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bool runOnFunction(Function &F) override;
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const char *getPassName() const override {
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return "AMDGPU IR optimizations";
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.addRequired<DivergenceAnalysis>();
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AU.setPreservesAll();
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}
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};
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} // End anonymous namespace
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bool AMDGPUCodeGenPrepare::doInitialization(Module &M) {
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return false;
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}
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bool AMDGPUCodeGenPrepare::runOnFunction(Function &F) {
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if (!TM || skipFunction(F))
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return false;
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DA = &getAnalysis<DivergenceAnalysis>();
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visit(F);
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return true;
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}
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INITIALIZE_TM_PASS_BEGIN(AMDGPUCodeGenPrepare, DEBUG_TYPE,
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"AMDGPU IR optimizations", false, false)
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INITIALIZE_PASS_DEPENDENCY(DivergenceAnalysis)
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INITIALIZE_TM_PASS_END(AMDGPUCodeGenPrepare, DEBUG_TYPE,
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"AMDGPU IR optimizations", false, false)
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char AMDGPUCodeGenPrepare::ID = 0;
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FunctionPass *llvm::createAMDGPUCodeGenPreparePass(const TargetMachine *TM) {
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return new AMDGPUCodeGenPrepare(TM);
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}
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