[llvm] [AArch64][MacroFusion] Fuse only tied AES pairs post-RA (PR #201610)

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Mon Jun 8 06:51:44 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/AArch64/AArch64MacroFusion.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/AArch64/AArch64MacroFusion.cpp b/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp
index 6b6923ace..bd4ef12a9 100644
--- a/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp
+++ b/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp
@@ -142,7 +142,8 @@ static bool isAESPair(const MachineInstr *FirstMI,
       return true;
     if (FirstMI->getOpcode() != AArch64::AESErr)
       return false;
-    return SecondOpcode == AArch64::AESMCrrTied || mayHaveWAWDependency(*FirstMI, SecondMI);
+    return SecondOpcode == AArch64::AESMCrrTied ||
+           mayHaveWAWDependency(*FirstMI, SecondMI);
   // AES decode.
   case AArch64::AESIMCrr:
   case AArch64::AESIMCrrTied:
@@ -150,7 +151,8 @@ static bool isAESPair(const MachineInstr *FirstMI,
       return true;
     if (FirstMI->getOpcode() != AArch64::AESDrr)
       return false;
-    return SecondOpcode == AArch64::AESIMCrrTied || mayHaveWAWDependency(*FirstMI, SecondMI);
+    return SecondOpcode == AArch64::AESIMCrrTied ||
+           mayHaveWAWDependency(*FirstMI, SecondMI);
   }
 
   return false;

``````````

</details>


https://github.com/llvm/llvm-project/pull/201610


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