D3D optimizes a lot before producing the byte code, see /O0 - /O3 fxc.exe switches. I don’t have much experience with spir-v but I’d expect something similar f

D3D optimizes a lot before producing the byte code, see /O0 - /O3 fxc.exe switches. I don’t have much experience with spir-v but I’d expect something similar for Vulkan & OpenCL.