[clang-tools-extra] [clang] [llvm] [HLSL] Vector standard conversions (PR #71098)

[John McCall via cfe-commits]

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@@ -15608,11 +15608,18 @@ static void CheckImplicitConversion(Sema &S, Expr *E, QualType T,
       if (S.SourceMgr.isInSystemMacro(CC))
         return;
       return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_vector_scalar);
+    } else if (S.getLangOpts().HLSL &&
+               Target->getAs<VectorType>()->getNumElements() <
+                   Source->getAs<VectorType>()->getNumElements()) {
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rjmccall wrote:

You can use `cast<VectorType>` here, since we're working with canonical types.

https://github.com/llvm/llvm-project/pull/71098