[clang] [HLSL] Fix vector list initialization (PR #161421)

[Farzon Lotfi via cfe-commits]

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@@ -9,12 +9,23 @@ struct S2 { float f; int i; };
 [numthreads(1,1,1)]
 void entry() {
   float2 LilVec = float2(1.0, 2.0);
-  float2 BrokenVec = float2(1.0, 2.0, 3.0); // expected-error{{excess elements in vector initializer}}
-  float3 NormieVec = float3(LilVec, 3.0, 4.0); // expected-error{{excess elements in vector initializer}}
-  float3 BrokenNormie = float3(3.0, 4.0); // expected-error{{too few elements in vector initialization (expected 3 elements, have 2)}}
-  float3 OverwhemledNormie = float3(3.0, 4.0, 5.0, 6.0); // expected-error{{excess elements in vector initializer}}
+  float2 BrokenVec = float2(1.0, 2.0, 3.0); // expected-error{{too many initializers in list for type 'float2' (vector of 2 'float' values) (expected 2 but found 3)}}
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farzonl wrote:

Rename this file to `clang/test/SemaHLSL/BuiltIns/vector-constructors-errors.hlsl`

https://github.com/llvm/llvm-project/pull/161421