[clang-tools-extra] [libcxx] [clang] [lldb] [lld] [llvm] [flang] [libc] [compiler-rt] [AMDGPU][GFX12] VOP encoding and codegen - add support for v_cvt fp8/… (PR #78414)

[Ivan Kosarev via llvm-commits]

kosarev wrote:

> Correct, some of these instructions use opsel[1] which in LLVM in stored in src1_modifiers so a dummy src1 is used.

Why can't we just use `SRCMODS.OP_SEL_1` with src0?

https://github.com/llvm/llvm-project/pull/78414