mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
9d1ef38768
Summary: Require DominatorTree when requiring/preserving LoopInfo in the old pass manager BreakCriticalEdges tries to keep LoopInfo and DominatorTree updated if they exist. However, since commit r321653 and r321805, to update LoopInfo we must have a DominatorTree, or we will hit an assert. To fix this we now make a couple of passes that only required/preserved LoopInfo also require DominatorTree. This solves PR37334. Reviewers: eli.friedman, efriedma Reviewed By: efriedma Subscribers: efriedma, llvm-commits Differential Revision: https://reviews.llvm.org/D46829 llvm-svn: 332583
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
//===- LazyBlockFrequencyInfo.cpp - Lazy Block Frequency Analysis ---------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is an alternative analysis pass to BlockFrequencyInfoWrapperPass. The
|
|
// difference is that with this pass the block frequencies are not computed when
|
|
// the analysis pass is executed but rather when the BFI result is explicitly
|
|
// requested by the analysis client.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/LazyBlockFrequencyInfo.h"
|
|
#include "llvm/Analysis/LazyBranchProbabilityInfo.h"
|
|
#include "llvm/Analysis/LoopInfo.h"
|
|
#include "llvm/IR/Dominators.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "lazy-block-freq"
|
|
|
|
INITIALIZE_PASS_BEGIN(LazyBlockFrequencyInfoPass, DEBUG_TYPE,
|
|
"Lazy Block Frequency Analysis", true, true)
|
|
INITIALIZE_PASS_DEPENDENCY(LazyBPIPass)
|
|
INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
|
|
INITIALIZE_PASS_END(LazyBlockFrequencyInfoPass, DEBUG_TYPE,
|
|
"Lazy Block Frequency Analysis", true, true)
|
|
|
|
char LazyBlockFrequencyInfoPass::ID = 0;
|
|
|
|
LazyBlockFrequencyInfoPass::LazyBlockFrequencyInfoPass() : FunctionPass(ID) {
|
|
initializeLazyBlockFrequencyInfoPassPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
void LazyBlockFrequencyInfoPass::print(raw_ostream &OS, const Module *) const {
|
|
LBFI.getCalculated().print(OS);
|
|
}
|
|
|
|
void LazyBlockFrequencyInfoPass::getAnalysisUsage(AnalysisUsage &AU) const {
|
|
LazyBranchProbabilityInfoPass::getLazyBPIAnalysisUsage(AU);
|
|
// We require DT so it's available when LI is available. The LI updating code
|
|
// asserts that DT is also present so if we don't make sure that we have DT
|
|
// here, that assert will trigger.
|
|
AU.addRequired<DominatorTreeWrapperPass>();
|
|
AU.addRequired<LoopInfoWrapperPass>();
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
void LazyBlockFrequencyInfoPass::releaseMemory() { LBFI.releaseMemory(); }
|
|
|
|
bool LazyBlockFrequencyInfoPass::runOnFunction(Function &F) {
|
|
auto &BPIPass = getAnalysis<LazyBranchProbabilityInfoPass>();
|
|
LoopInfo &LI = getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
|
|
LBFI.setAnalysis(&F, &BPIPass, &LI);
|
|
return false;
|
|
}
|
|
|
|
void LazyBlockFrequencyInfoPass::getLazyBFIAnalysisUsage(AnalysisUsage &AU) {
|
|
LazyBranchProbabilityInfoPass::getLazyBPIAnalysisUsage(AU);
|
|
AU.addRequired<LazyBlockFrequencyInfoPass>();
|
|
AU.addRequired<LoopInfoWrapperPass>();
|
|
}
|
|
|
|
void llvm::initializeLazyBFIPassPass(PassRegistry &Registry) {
|
|
initializeLazyBPIPassPass(Registry);
|
|
INITIALIZE_PASS_DEPENDENCY(LazyBlockFrequencyInfoPass);
|
|
INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass);
|
|
}
|