================
@@ -24483,6 +24483,26 @@ ISD::NodeType
RISCVTargetLowering::getExtendForAtomicCmpSwapArg() const {
return Subtarget.hasStdExtZacas() ? ISD::ANY_EXTEND : ISD::SIGN_EXTEND;
}
+ISD::NodeType RISCVTargetLowering::getExtendForAtomicRMWArg(unsigned Op) const
{
+ // Zaamo will use amo<op>.w which does not require extension.
+ if (Subtarget.hasStdExtZaamo() || Subtarget.hasForcedAtomics())
+ return ISD::ANY_EXTEND;
+
+ // Zalasr pseudo expansions with comparison
+ assert(Subtarget.hasStdExtZalrsc());
+ switch (Op) {
+ case ISD::ATOMIC_LOAD_MIN:
+ case ISD::ATOMIC_LOAD_MAX:
+ return ISD::SIGN_EXTEND;
+ case ISD::ATOMIC_LOAD_UMIN:
+ case ISD::ATOMIC_LOAD_UMAX:
+ return ISD::ZERO_EXTEND;
----------------
slachowsky wrote:
Done in 72838215e6a7397178483c6e3643c61ef3a17df2
https://github.com/llvm/llvm-project/pull/163672
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