[AMDGPU] Adds pre-commit test for fmul-select combine#111107

arsenm merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

vg0204:vg0204/pre-commit-test-ldexp-dag-combinevg0204/llvm-project:vg0204/pre-commit-test-ldexp-dag-combineCopy head branch name to clipboard