[llvm] [ARM] R11 not pushed adjacent to link register with PAC-M and AAPCS frame chain fix (PR #82801)

[James Westwood via llvm-commits]

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@@ -222,7 +222,8 @@ void Thumb1FrameLowering::emitPrologue(MachineFunction &MF,
     case ARM::R8:
     case ARM::R9:
     case ARM::R10:
-      if (STI.splitFramePushPop(MF)) {
+      if (STI.getPushPopSplitVariation(MF) ==
+          ARMSubtarget::PushPopSplitVariation::R7Split) {
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jwestwood921 wrote:

It looks like Thumb1FrameLowering is initialized only when isThumb1Only() is true, so the variation will always be R7Split. Therefore the if statement is unnecessary.

https://github.com/llvm/llvm-project/pull/82801