[llvm] [AArch64] Don't tail call memset if it would convert to a bzero. (PR #98969)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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git-clang-format --diff e6ec7c8f74d1be778f4ddf794d0e2fb63b0dc3be 5aad864dec2a452a1367f118bf8c722317c7cceb --extensions h,cpp -- llvm/include/llvm/CodeGen/Analysis.h llvm/include/llvm/CodeGen/SelectionDAG.h llvm/lib/CodeGen/Analysis.cpp llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/Analysis.cpp b/llvm/lib/CodeGen/Analysis.cpp
index 7514e33d47..a34fc6c28c 100644
--- a/llvm/lib/CodeGen/Analysis.cpp
+++ b/llvm/lib/CodeGen/Analysis.cpp
@@ -743,13 +743,13 @@ bool llvm::returnTypeIsEligibleForTailCall(const Function *F,
 }
 
 bool llvm::funcReturnsFirstArgOfCall(const CallInst &CI) {
-    const ReturnInst *Ret = dyn_cast<ReturnInst>(CI.getParent()->getTerminator());
-    Value *RetVal = Ret ? Ret->getReturnValue() : nullptr;
-    bool ReturnsFirstArg = false;
-    if (RetVal && ((RetVal == CI.getArgOperand(0) ||
-                    isPointerBitcastEqualTo(RetVal, CI.getArgOperand(0)))))
-      ReturnsFirstArg = true;
-    return ReturnsFirstArg;
+  const ReturnInst *Ret = dyn_cast<ReturnInst>(CI.getParent()->getTerminator());
+  Value *RetVal = Ret ? Ret->getReturnValue() : nullptr;
+  bool ReturnsFirstArg = false;
+  if (RetVal && ((RetVal == CI.getArgOperand(0) ||
+                  isPointerBitcastEqualTo(RetVal, CI.getArgOperand(0)))))
+    ReturnsFirstArg = true;
+  return ReturnsFirstArg;
 }
 
 static void collectEHScopeMembers(
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index b17a5815c1..155d33ce78 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -6502,8 +6502,8 @@ void SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I,
     bool isVol = MSI.isVolatile();
     SDValue Root = isVol ? getRoot() : getMemoryRoot();
     SDValue MS = DAG.getMemset(
-        Root, sdl, Op1, Op2, Op3, Alignment, isVol, /* AlwaysInline */ false, &I,
-        MachinePointerInfo(I.getArgOperand(0)), I.getAAMetadata());
+        Root, sdl, Op1, Op2, Op3, Alignment, isVol, /* AlwaysInline */ false,
+        &I, MachinePointerInfo(I.getArgOperand(0)), I.getAAMetadata());
     updateDAGForMaybeTailCall(MS);
     return;
   }

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https://github.com/llvm/llvm-project/pull/98969