[llvm] [AArch64][GISel] Recover ADDHN from OR comparison masks (PR #213925)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
index 3e7c1c352..f8030f4a0 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
@@ -407,10 +407,10 @@ bool matchTruncOrToADDHN(MachineInstr &MI, MachineRegisterInfo &MRI,
   // If the narrow result is immediately any-extended back to the original type,
   // the G_OR is cheaper than G_ADDHN followed by a vector widen.
   if (MRI.hasOneNonDBGUse(Dst)) {
-   MachineInstr &UseMI = *MRI.use_nodbg_instructions(Dst).begin();
-   if (UseMI.getOpcode() == TargetOpcode::G_ANYEXT &&
-       MRI.getType(UseMI.getOperand(0).getReg()) == SrcTy)
-     return false;
+    MachineInstr &UseMI = *MRI.use_nodbg_instructions(Dst).begin();
+    if (UseMI.getOpcode() == TargetOpcode::G_ANYEXT &&
+        MRI.getType(UseMI.getOperand(0).getReg()) == SrcTy)
+      return false;
   }
 
   unsigned EltSize = SrcTy.getScalarSizeInBits();

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https://github.com/llvm/llvm-project/pull/213925