[llvm] [ARM] Special case scmp 0 (PR #207428)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/ARM/ARMISelLowering.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index b155bb274..f00731618 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -10427,7 +10427,8 @@ SDValue ARMTargetLowering::LowerCMP(SDValue Op, SelectionDAG &DAG) const {
 
   // isCMN should not return true for 0
   bool isCmp = isNullConstant(RHS);
-  assert((Opcode != ARMISD::ADDC || !isCmp) && "isCMN should not return true for 0");
+  assert((Opcode != ARMISD::ADDC || !isCmp) &&
+         "isCMN should not return true for 0");
 
   // Generate the operation with flags
   SDValue OpResult;

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https://github.com/llvm/llvm-project/pull/207428