[clang] [HLSL] Fix intrinsics header file for wave intrinsics using u/int16_t types, updating them to 6.2 (PR #186218)

[Tex Riddell via cfe-commits]

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@@ -30,11 +30,17 @@ namespace hlsl {
 #define _HLSL_16BIT_AVAILABILITY_STAGE(platform, version, stage)               \
   __attribute__((                                                              \
       availability(platform, introduced = version, environment = stage)))
+#define _HLSL_16BIT_AVAILABILITY_DEFAULT(shadermodel)                          \
+  _HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
 #else
 #define _HLSL_16BIT_AVAILABILITY(environment, version)
 #define _HLSL_16BIT_AVAILABILITY_STAGE(environment, version, stage)
+#define _HLSL_16BIT_AVAILABILITY_DEFAULT(shadermodel)
 #endif
 
+#define _HLSL_AVAILABILITY_6_2_DEFAULT(shadermodel)                            \
+  _HLSL_AVAILABILITY(shadermodel, 6.2)
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tex3d wrote:

I'm trying to argue that we don't need the extra `_HLSL_AVAILABILITY_6_2` macro at all. We should be able to use just `_HLSL_16BIT_AVAILABILITY_DEFAULT()`, since it's always defined for the 16-bit types. For `half` types, you want the availability attribute only when `__HLSL_ENABLE_16_BIT` is defined, because otherwise it maps to `float`.

https://github.com/llvm/llvm-project/pull/186218