[llvm] [AArch64] Check for negative numbers when adjusting icmps (PR #140999)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/Target/AArch64/AArch64ISelLowering.cpp llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp b/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
index 5d44bc841..aced09812 100644
--- a/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -3878,8 +3878,8 @@ void ARMDAGToDAGISel::Select(SDNode *N) {
         }
       }
 
-      // In thumb1, If we have (x & C1), and C1 is an appropriate mask, we can transform it
-      // into "((x << n) >> n)", assuming that C1 cannot fit 
+      // In thumb1, If we have (x & C1), and C1 is an appropriate mask, we can
+      // transform it into "((x << n) >> n)", assuming that C1 cannot fit
 
       if (Subtarget->isThumb1Only() && isMask_32(Imm) && Imm > 255) {
         unsigned ShiftBits = llvm::countl_zero(Mask);

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https://github.com/llvm/llvm-project/pull/140999