[llvm] [ARM] Fix -mno-omit-leaf-frame-pointer flag doesn't works on 32-bit ARM (PR #109628)

[Eli Friedman via llvm-commits]

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@@ -40,6 +40,20 @@ bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const {
   llvm_unreachable("unknown frame pointer flag");
 }
 
+/// DisableLeafFramePointerElim - This returns true if leaf frame pointer
+/// elimination optimization should be disabled for the given machine function.
+bool TargetOptions::DisableLeafFramePointerElim(
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efriedma-quic wrote:

If you want to preserve the existing behavior, maybe ARMFrameLowering::keepFramePointer() should check MF.getFrameInfo().hasCalls()?

https://github.com/llvm/llvm-project/pull/109628