[clang] [HLSL][SPIRV] Fix calling convention for call in entry function. (PR #110275)

[Steven Perron via cfe-commits]

s-perron wrote:

> LGTM! I think changing the mangling for Vulkan is the best solution here.
> 
> One small comment, later on if/when you decide to use SPIRVBuiltins.cpp/.td for lowering builtins, there might be additional changes needed. The lookup function expects Itanium demangled strings.

Thanks we will keep that in mind.

https://github.com/llvm/llvm-project/pull/110275