[llvm] [AArch64]Fix invalid use of ld1/st1 in stack alloc (PR #105518)

[via llvm-commits]

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@@ -3355,8 +3360,8 @@ bool AArch64FrameLowering::spillCalleeSavedRegisters(
           MachineMemOperand::MOStore, Size, Alignment));
       MIB.addReg(PnReg);
       MIB.addReg(AArch64::SP)
-          .addImm(RPI.Offset) // [sp, #offset*scale],
-                              // where factor*scale is implicit
+          .addImm(RPI.Offset / 2) // [sp, #offset*2*scale],
+                                  // where scale is implicit
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Lukacma wrote:

Yeah I was debating this comment. It depends what does the "offset" part in the comment mean. If it refers to RPI.Offset, then current comment is accurate, if it refers to RPI.Offset/2 then this change is correct. I thought that because RPI.Offset has "offset" in the name, I would  make "offset" in the comment refer to it.

https://github.com/llvm/llvm-project/pull/105518