[llvm] [AArch64] Fix miscompilation due to integer overflow in immediate offset for stack store/load instructions with preserve_all (PR #207026)

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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/AArch64/AArch64FrameLowering.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
index 369b54d1c..a23c2833e 100644
--- a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
@@ -1801,7 +1801,8 @@ void computeCalleeSaveRegisterPairs(const AArch64FrameLowering &AFL,
       int Aligned = AlignOffset(ByteOffset, Scale);
       int PairOffset = IsWindows ? Aligned : Aligned + StackFillDir * 2 * Scale;
       // True when the pair's ldp/stp offset fits the signed 7-bit scaled imm.
-      bool PairFitsImmRange = PairOffset / Scale >= -64 && PairOffset / Scale <= 63;
+      bool PairFitsImmRange =
+          PairOffset / Scale >= -64 && PairOffset / Scale <= 63;
       switch (RPI.Type) {
       case RegPairInfo::GPR:
         if (AArch64::GPR64RegClass.contains(NextReg) && PairFitsImmRange &&

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https://github.com/llvm/llvm-project/pull/207026