a8b6bed223
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
//====----- MachineBlockFrequencyInfo.cpp - Machine Block Frequency Analysis ----====//
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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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// Loops should be simplified before this analysis.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
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#include "llvm/Analysis/BlockFrequencyImpl.h"
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#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/InitializePasses.h"
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using namespace llvm;
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INITIALIZE_PASS_BEGIN(MachineBlockFrequencyInfo, "machine-block-freq",
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"Machine Block Frequency Analysis", true, true)
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INITIALIZE_PASS_DEPENDENCY(MachineBranchProbabilityInfo)
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INITIALIZE_PASS_END(MachineBlockFrequencyInfo, "machine-block-freq",
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"Machine Block Frequency Analysis", true, true)
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char MachineBlockFrequencyInfo::ID = 0;
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MachineBlockFrequencyInfo::MachineBlockFrequencyInfo() : MachineFunctionPass(ID) {
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initializeMachineBlockFrequencyInfoPass(*PassRegistry::getPassRegistry());
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MBFI = new BlockFrequencyImpl<MachineBasicBlock, MachineFunction,
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MachineBranchProbabilityInfo>();
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}
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MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() {
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delete MBFI;
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}
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void MachineBlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<MachineBranchProbabilityInfo>();
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AU.setPreservesAll();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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bool MachineBlockFrequencyInfo::runOnMachineFunction(MachineFunction &F) {
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MachineBranchProbabilityInfo &MBPI = getAnalysis<MachineBranchProbabilityInfo>();
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MBFI->doFunction(&F, &MBPI);
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return false;
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}
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BlockFrequency MachineBlockFrequencyInfo::
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getBlockFreq(const MachineBasicBlock *MBB) const {
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return MBFI->getBlockFreq(MBB);
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}
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