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9667127c14
The DEBUG() macro is very generic so it might clash with other projects. The renaming was done as follows: - git grep -l 'DEBUG' | xargs sed -i 's/\bDEBUG\s\?(/LLVM_DEBUG(/g' - git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM - Manual change to APInt - Manually chage DOCS as regex doesn't match it. In the transition period the DEBUG() macro is still present and aliased to the LLVM_DEBUG() one. Differential Revision: https://reviews.llvm.org/D43624 llvm-svn: 332240
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
//===--------- PPCPreEmitPeephole.cpp - Late peephole optimizations -------===//
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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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// A pre-emit peephole for catching opportunities introduced by late passes such
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// as MachineBlockPlacement.
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//
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//===----------------------------------------------------------------------===//
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#include "PPC.h"
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#include "PPCInstrInfo.h"
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#include "PPCSubtarget.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/CodeGen/LivePhysRegs.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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#define DEBUG_TYPE "ppc-pre-emit-peephole"
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STATISTIC(NumRRConvertedInPreEmit,
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"Number of r+r instructions converted to r+i in pre-emit peephole");
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STATISTIC(NumRemovedInPreEmit,
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"Number of instructions deleted in pre-emit peephole");
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static cl::opt<bool>
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RunPreEmitPeephole("ppc-late-peephole", cl::Hidden, cl::init(true),
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cl::desc("Run pre-emit peephole optimizations."));
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namespace {
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class PPCPreEmitPeephole : public MachineFunctionPass {
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public:
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static char ID;
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PPCPreEmitPeephole() : MachineFunctionPass(ID) {
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initializePPCPreEmitPeepholePass(*PassRegistry::getPassRegistry());
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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MachineFunctionProperties getRequiredProperties() const override {
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return MachineFunctionProperties().set(
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MachineFunctionProperties::Property::NoVRegs);
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}
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bool runOnMachineFunction(MachineFunction &MF) override {
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if (skipFunction(MF.getFunction()) || !RunPreEmitPeephole)
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return false;
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bool Changed = false;
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const PPCInstrInfo *TII = MF.getSubtarget<PPCSubtarget>().getInstrInfo();
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SmallVector<MachineInstr *, 4> InstrsToErase;
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for (MachineBasicBlock &MBB : MF) {
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for (MachineInstr &MI : MBB) {
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MachineInstr *DefMIToErase = nullptr;
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if (TII->convertToImmediateForm(MI, &DefMIToErase)) {
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Changed = true;
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NumRRConvertedInPreEmit++;
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LLVM_DEBUG(dbgs() << "Converted instruction to imm form: ");
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LLVM_DEBUG(MI.dump());
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if (DefMIToErase) {
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InstrsToErase.push_back(DefMIToErase);
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}
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}
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}
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}
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for (MachineInstr *MI : InstrsToErase) {
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LLVM_DEBUG(dbgs() << "PPC pre-emit peephole: erasing instruction: ");
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LLVM_DEBUG(MI->dump());
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MI->eraseFromParent();
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NumRemovedInPreEmit++;
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}
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return Changed;
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}
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};
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}
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INITIALIZE_PASS(PPCPreEmitPeephole, DEBUG_TYPE, "PowerPC Pre-Emit Peephole",
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false, false)
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char PPCPreEmitPeephole::ID = 0;
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FunctionPass *llvm::createPPCPreEmitPeepholePass() {
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return new PPCPreEmitPeephole();
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}
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