[llvm] [AArch64][SME] Support Windows/stack probes in MachineSMEABIPass (PR #149063)
Sander de Smalen via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 4 08:54:09 PDT 2025
================
@@ -8291,7 +8291,39 @@ SDValue AArch64TargetLowering::LowerFormalArguments(
if (Subtarget->hasCustomCallingConv())
Subtarget->getRegisterInfo()->UpdateCustomCalleeSavedRegs(MF);
- if (!getTM().useNewSMEABILowering() || Attrs.hasAgnosticZAInterface()) {
+ if (getTM().useNewSMEABILowering() && !Attrs.hasAgnosticZAInterface()) {
+ if (Subtarget->isTargetWindows() || hasInlineStackProbe(MF)) {
+ SDValue Size;
+ if (Attrs.hasZAState()) {
+ SDValue SVL = DAG.getNode(AArch64ISD::RDSVL, DL, MVT::i64,
+ DAG.getConstant(1, DL, MVT::i32));
+ Size = DAG.getNode(ISD::MUL, DL, MVT::i64, SVL, SVL);
+ } else if (Attrs.hasAgnosticZAInterface()) {
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sdesmalen-arm wrote:
`Attrs.hasAgnosticZAInterface()` is always false, because the condition above `if (getTM().useNewSMEABILowering() && !Attrs.hasAgnosticZAInterface())`.
https://github.com/llvm/llvm-project/pull/149063
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