[clang] [llvm] [clang-tools-extra] [X86] Use plain load/store instead of cmpxchg16b for atomics with AVX (PR #74275)

@@ -30113,32 +30120,40 @@ TargetLoweringBase::AtomicExpansionKind X86TargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const { Type *MemType = SI->getValueOperand()->getType(); - bool NoImplicitFloatOps = -

[clang] [llvm] [clang-tools-extra] [X86] Use plain load/store instead of cmpxchg16b for atomics with AVX (PR #74275)

@@ -31259,14 +31274,23 @@ static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG , if (!IsSeqCst && IsTypeLegal) return Op; - if (VT == MVT::i64 && !IsTypeLegal) { + if (!IsTypeLegal && !Subtarget.useSoftFloat() && +

[clang] [llvm] [clang-tools-extra] [X86] Use plain load/store instead of cmpxchg16b for atomics with AVX (PR #74275)

@@ -30095,12 +30102,16 @@ TargetLoweringBase::AtomicExpansionKind X86TargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const { Type *MemType = SI->getValueOperand()->getType(); - bool NoImplicitFloatOps = -