[clang] [llvm] Hlsl asuint16 function (PR #132315)

[Ashley Coleman via llvm-commits]

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@@ -0,0 +1,52 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.2-library %s -fnative-half-type -verify
+
+uint16_t test_asuint16_less_argument()
+{
+    return asuint16();
+  // expected-error at -1 {{no matching function for call to 'asuint16'}}
+  // expected-note at hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires single argument 'V', but no arguments were provided}}
+  // expected-note at hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires single argument 'F', but no arguments were provided}}
+
+}
+
+int16_t4 test_asuint16_too_many_arg(uint16_t p0, uint16_t p1)
+{
+    return asuint16(p0, p1);
+  // expected-error at -1 {{no matching function for call to 'asuint16'}}
+  // expected-note at hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires single argument 'V', but 2 arguments were provided}}
+  // expected-note at hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires single argument 'F', but 2 arguments were provided}}
+
+}
+
+int16_t test_asuint16_int(int p1)
+{
+    return asuint16(p1);
+  // expected-error at -1 {{no matching function for call to 'asuint16'}}
+  // expected-note at hlsl/hlsl_intrinsics.h:* {{candidate template ignored: could not match 'vector<T, N>' against 'int'}}
+  // expected-note at hlsl/hlsl_intrinsics.h:* {{candidate template ignored: substitution failure [with T = int]: no type named 'Type'}}
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V-FEXrt wrote:

Probably not an actionable item unless @farzonl has any ideas

The notes here feel quite unhelpful from a user perspective. I'm guessing the error is that `int` doesn't fit in `int16_t` but if I was a user and I saw this error then I'd be extremely confusing by what's actually wrong. That said the actual error at least points at the function and tells you it's the wrong overload so maybe not

https://github.com/llvm/llvm-project/pull/132315