[llvm] [X86] Prefer carry to overflow flag when using multiplication (PR #221611)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/X86/X86FastISel.cpp llvm/lib/Target/X86/X86ISelLowering.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index a8f228ea6..a5ca264a2 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -249,7 +249,9 @@ bool X86FastISel::foldX86XALUIntrinsic(X86::CondCode &CC, const Instruction *I,
   switch (II->getIntrinsicID()) {
   default: return false;
   case Intrinsic::sadd_with_overflow:
-  case Intrinsic::ssub_with_overflow: TmpCC = X86::COND_O; break;
+  case Intrinsic::ssub_with_overflow:
+    TmpCC = X86::COND_O;
+    break;
   case Intrinsic::smul_with_overflow:
   case Intrinsic::umul_with_overflow:
   case Intrinsic::uadd_with_overflow:
@@ -2861,9 +2863,13 @@ bool X86FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) {
     case Intrinsic::usub_with_overflow:
       BaseOpc = ISD::SUB; CondCode = X86::COND_B; break;
     case Intrinsic::smul_with_overflow:
-      BaseOpc = X86ISD::SMUL; CondCode = X86::COND_B; break;
+      BaseOpc = X86ISD::SMUL;
+      CondCode = X86::COND_B;
+      break;
     case Intrinsic::umul_with_overflow:
-      BaseOpc = X86ISD::UMUL; CondCode = X86::COND_B; break;
+      BaseOpc = X86ISD::UMUL;
+      CondCode = X86::COND_B;
+      break;
     }
 
     Register LHSReg = getRegForValue(LHS);

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https://github.com/llvm/llvm-project/pull/221611