[clang] [NFC] Avoid potential nullptr deref by using castAs<> (PR #123395)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: None (schittir)

<details>
<summary>Changes</summary>

Use castAs<> instead of getAs<>

---
Full diff: https://github.com/llvm/llvm-project/pull/123395.diff


1 Files Affected:

- (modified) clang/lib/CodeGen/CGBuiltin.cpp (+4-4) 


``````````diff
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 2385f2a320b625..d87528c432a360 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -19297,9 +19297,9 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
     assert(T0->isVectorTy() && T1->isVectorTy() &&
            "Dot product of vector and scalar is not supported.");
 
-    auto *VecTy0 = E->getArg(0)->getType()->getAs<VectorType>();
+    auto *VecTy0 = E->getArg(0)->getType()->castAs<VectorType>();
     [[maybe_unused]] auto *VecTy1 =
-        E->getArg(1)->getType()->getAs<VectorType>();
+        E->getArg(1)->getType()->castAs<VectorType>();
 
     assert(VecTy0->getElementType() == VecTy1->getElementType() &&
            "Dot product of vectors need the same element types.");
@@ -19392,7 +19392,7 @@ case Builtin::BI__builtin_hlsl_elementwise_isinf: {
     llvm::Type *Xty = Op0->getType();
     llvm::Type *retType = llvm::Type::getInt1Ty(this->getLLVMContext());
     if (Xty->isVectorTy()) {
-      auto *XVecTy = E->getArg(0)->getType()->getAs<VectorType>();
+      auto *XVecTy = E->getArg(0)->getType()->castAs<VectorType>();
       retType = llvm::VectorType::get(
           retType, ElementCount::getFixed(XVecTy->getNumElements()));
     }
@@ -19578,7 +19578,7 @@ case Builtin::BI__builtin_hlsl_elementwise_isinf: {
     llvm::Type *Xty = Op0->getType();
     llvm::Type *retType = llvm::Type::getInt32Ty(this->getLLVMContext());
     if (Xty->isVectorTy()) {
-      auto *XVecTy = Arg0->getType()->getAs<VectorType>();
+      auto *XVecTy = Arg0->getType()->castAs<VectorType>();
       retType = llvm::VectorType::get(
           retType, ElementCount::getFixed(XVecTy->getNumElements()));
     }

``````````

</details>


https://github.com/llvm/llvm-project/pull/123395