[llvm] [llvm][CodeGen] Added a check in CodeGenPrepare::optimizeSwitchType (PR #83322)

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``````````bash
git-clang-format --diff d82e93e7f129d9e8b72570efdf4a15d6ec3d4336 bcaca8e49e80995493016e3508006b57a484adee -- llvm/lib/CodeGen/CodeGenPrepare.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 39643c17d3..4ddcd38e00 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -7399,9 +7399,9 @@ bool CodeGenPrepare::optimizeSwitchType(SwitchInst *SI) {
   }
   // If Cond has already a zext or sext don't insert another one.
   bool ExtExists = false;
-  if(auto *I = dyn_cast<Instruction>(Cond)){
+  if (auto *I = dyn_cast<Instruction>(Cond)) {
     unsigned Opc = I->getOpcode();
-    if(Opc == Instruction::SExt || Opc == Instruction::ZExt){
+    if (Opc == Instruction::SExt || Opc == Instruction::ZExt) {
       ExtExists = true;
     }
     /* TODO check if something can be done with signed compares
@@ -7411,11 +7411,11 @@ bool CodeGenPrepare::optimizeSwitchType(SwitchInst *SI) {
       }
     }*/
   }
-  // Extension exists but has smaller type we need to widen it to 
+  // Extension exists but has smaller type we need to widen it to
   // the preferred switch type
-  if(ExtExists){
-    Cond->mutateType(NewType); 
-  }else{
+  if (ExtExists) {
+    Cond->mutateType(NewType);
+  } else {
     auto *ExtInst = CastInst::Create(ExtType, Cond, NewType);
     ExtInst->insertBefore(SI);
     ExtInst->setDebugLoc(SI->getDebugLoc());

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https://github.com/llvm/llvm-project/pull/83322