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[CGAtomic] Delete outdated code comparing success/failure ordering for cmpxchg. 

This doesn't actually have any effect: we only call this code with
SequentiallyConsistent orderings.  But delete it anyway for consistency
with other recent changes.
This commit is contained in:
Eli Friedman 2021-05-28 15:32:36 -07:00
parent 2644399ce7
commit 577fea4e1a
1 changed files with 0 additions and 5 deletions
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5
clang/lib/CodeGen/CGAtomic.cpp
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@ -1730,11 +1730,6 @@ AtomicInfo::EmitAtomicCompareExchangeLibcall(llvm::Value *ExpectedAddr,
std::pair<RValue, llvm::Value *> AtomicInfo::EmitAtomicCompareExchange(
RValue Expected, RValue Desired, llvm::AtomicOrdering Success,
llvm::AtomicOrdering Failure, bool IsWeak) {
if (isStrongerThan(Failure, Success))
// Don't assert on undefined behavior "failure argument shall be no stronger
// than the success argument".
Failure = llvm::AtomicCmpXchgInst::getStrongestFailureOrdering(Success);
// Check whether we should use a library call.
if (shouldUseLibcall()) {
// Produce a source address.