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NFC: skip FenceInst up-front in AtomicExpandPass.

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llvm-svn: 264583
This commit is contained in:
James Y Knight 2016-03-28 15:05:30 +00:00
parent bd3e938f88
commit 387d85aaa9
1 changed files with 5 additions and 5 deletions
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10
lib/CodeGen/AtomicExpandPass.cpp
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@ -86,9 +86,10 @@ bool AtomicExpand::runOnFunction(Function &F) {
// Changing control-flow while iterating through it is a bad idea, so gather a
// list of all atomic instructions before we start.
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
if (I->isAtomic())
AtomicInsts.push_back(&*I);
for (inst_iterator II = inst_begin(F), E = inst_end(F); II != E; ++II) {
Instruction *I = &*II;
if (I->isAtomic() && !isa<FenceInst>(I))
AtomicInsts.push_back(I);
}
bool MadeChange = false;
@ -97,8 +98,7 @@ bool AtomicExpand::runOnFunction(Function &F) {
auto SI = dyn_cast<StoreInst>(I);
auto RMWI = dyn_cast<AtomicRMWInst>(I);
auto CASI = dyn_cast<AtomicCmpXchgInst>(I);
assert((LI || SI || RMWI || CASI || isa<FenceInst>(I)) &&
"Unknown atomic instruction");
assert((LI || SI || RMWI || CASI) && "Unknown atomic instruction");
if (TLI->shouldInsertFencesForAtomic(I)) {
auto FenceOrdering = Monotonic;