mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
68092989f3
This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
76 lines
3.0 KiB
C++
76 lines
3.0 KiB
C++
//===- LazyBranchProbabilityInfo.cpp - Lazy Branch Probability Analysis ---===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is an alternative analysis pass to BranchProbabilityInfoWrapperPass.
|
|
// The difference is that with this pass the branch probabilities are not
|
|
// computed when the analysis pass is executed but rather when the BPI results
|
|
// is explicitly requested by the analysis client.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/LazyBranchProbabilityInfo.h"
|
|
#include "llvm/Analysis/LoopInfo.h"
|
|
#include "llvm/Analysis/TargetLibraryInfo.h"
|
|
#include "llvm/IR/Dominators.h"
|
|
#include "llvm/InitializePasses.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "lazy-branch-prob"
|
|
|
|
INITIALIZE_PASS_BEGIN(LazyBranchProbabilityInfoPass, DEBUG_TYPE,
|
|
"Lazy Branch Probability Analysis", true, true)
|
|
INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
|
|
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
|
|
INITIALIZE_PASS_END(LazyBranchProbabilityInfoPass, DEBUG_TYPE,
|
|
"Lazy Branch Probability Analysis", true, true)
|
|
|
|
char LazyBranchProbabilityInfoPass::ID = 0;
|
|
|
|
LazyBranchProbabilityInfoPass::LazyBranchProbabilityInfoPass()
|
|
: FunctionPass(ID) {
|
|
initializeLazyBranchProbabilityInfoPassPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
void LazyBranchProbabilityInfoPass::print(raw_ostream &OS,
|
|
const Module *) const {
|
|
LBPI->getCalculated().print(OS);
|
|
}
|
|
|
|
void LazyBranchProbabilityInfoPass::getAnalysisUsage(AnalysisUsage &AU) const {
|
|
// 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.addRequired<TargetLibraryInfoWrapperPass>();
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
void LazyBranchProbabilityInfoPass::releaseMemory() { LBPI.reset(); }
|
|
|
|
bool LazyBranchProbabilityInfoPass::runOnFunction(Function &F) {
|
|
LoopInfo &LI = getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
|
|
TargetLibraryInfo &TLI =
|
|
getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
|
|
LBPI = std::make_unique<LazyBranchProbabilityInfo>(&F, &LI, &TLI);
|
|
return false;
|
|
}
|
|
|
|
void LazyBranchProbabilityInfoPass::getLazyBPIAnalysisUsage(AnalysisUsage &AU) {
|
|
AU.addRequired<LazyBranchProbabilityInfoPass>();
|
|
AU.addRequired<LoopInfoWrapperPass>();
|
|
AU.addRequired<TargetLibraryInfoWrapperPass>();
|
|
}
|
|
|
|
void llvm::initializeLazyBPIPassPass(PassRegistry &Registry) {
|
|
INITIALIZE_PASS_DEPENDENCY(LazyBranchProbabilityInfoPass);
|
|
INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass);
|
|
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass);
|
|
}
|