[SPIR-V] Errors with -fvk-invert-y and lib compilation #7446
Description
Description
I'm getting compile warnings when trying to invert y on a lib compilation of a vertex shader. It seems clear that it doesn't actually do what it should, when compiling this as a VS shader directly (instead of lib) it will correctly invert.
Another one that might need special caution is fvk-use-dx-position-w which might have the same problem; as I've encountered this before when compiling non PS. An important note is that lib files don't know which type of entrypoint is being compiled, it's not unlikely that non PS/VS shaders are being compiled with the same compile flags.
Steps to Reproduce
https://godbolt.org/z/sbrKbbzW8.
Actual Behavior
These two should function exactly as they do in PS (use dx position w) and VS (invert y). For user friendliness these should be possible even if VS/PS isn't available, to simplify the compile flow in case the lib doesn't actually contain any.
Environment
- DXC version: Any
- Host Operating System: N/A