================
@@ -32967,6 +32967,19 @@ X86TargetLowering::shouldCastAtomicLoadInIR(LoadInst
*LI) const {
return AtomicExpansionKind::None;
}
+TargetLowering::AtomicExpansionKind
+X86TargetLowering::shouldCastAtomicStoreInIR(StoreInst *SI) const {
+ Type *Ty = SI->getValueOperand()->getType();
+ if (!Ty->getScalarType()->isFloatingPointTy())
+ return AtomicExpansionKind::None;
+ // Sub-128-bit FP vectors codegen better when DAG widening folds the value
+ // into an extractelt-from-XMM pattern, instead of an IR-level bitcast to a
+ // scalar integer (which the type legalizer scalarizes).
----------------
jofrn wrote:
Alright, done.
https://github.com/llvm/llvm-project/pull/197861
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