Hi, we're doing a slightly weird thing, which is we're including the SPIR-V Header in our HLSL code to make the writing on SPIR-V intrinsics easier (don't need to remember the opcodes)

However HLSL doesn't support global operator overloads, so we need a define similar to SPV_ENABLE_UTILITY_CODE (although a negative one so backwards compatibility it preserved)

alternative is #ifndef __HLSL_VERSION which checks for the HLSL compiler.

PR incoming.