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[COFF] ICF: use parallelForEach{,N} 

Summary: They have an additional `ThreadsEnabled` check, which does not matter much.

Reviewers: pcc, ruiu, rnk

Reviewed By: ruiu

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D54812

llvm-svn: 347587
This commit is contained in:
Fangrui Song 2018-11-26 20:07:07 +00:00
parent b0fd2db8fc
commit 4ed350d6c4
1 changed files with 5 additions and 4 deletions
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9
lld/COFF/ICF.cpp
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@ -22,6 +22,7 @@
#include "Chunks.h"
#include "Symbols.h"
#include "lld/Common/ErrorHandler.h"
#include "lld/Common/Threads.h"
#include "lld/Common/Timer.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/Support/Debug.h"
@ -226,10 +227,10 @@ void ICF::forEachClass(std::function<void(size_t, size_t)> Fn) {
size_t Boundaries[NumShards + 1];
Boundaries[0] = 0;
Boundaries[NumShards] = Chunks.size();
for_each_n(parallel::par, size_t(1), NumShards, [&](size_t I) {
parallelForEachN(1, NumShards, [&](size_t I) {
Boundaries[I] = findBoundary((I - 1) * Step, Chunks.size());
});
for_each_n(parallel::par, size_t(1), NumShards + 1, [&](size_t I) {
parallelForEachN(1, NumShards + 1, [&](size_t I) {
if (Boundaries[I - 1] < Boundaries[I]) {
forEachClassRange(Boundaries[I - 1], Boundaries[I], Fn);
}
@ -261,13 +262,13 @@ void ICF::run(ArrayRef<Chunk *> Vec) {
SC->Class[0] = NextId++;
// Initially, we use hash values to partition sections.
for_each(parallel::par, Chunks.begin(), Chunks.end(), [&](SectionChunk *SC) {
parallelForEach(Chunks, [&](SectionChunk *SC) {
SC->Class[1] = xxHash64(SC->getContents());
});
// Combine the hashes of the sections referenced by each section into its
// hash.
for_each(parallel::par, Chunks.begin(), Chunks.end(), [&](SectionChunk *SC) {
parallelForEach(Chunks, [&](SectionChunk *SC) {
uint32_t Hash = SC->Class[1];
for (Symbol *B : SC->symbols())
if (auto *Sym = dyn_cast_or_null<DefinedRegular>(B))