[SPIR-V] Implement selection for llvm.canonicalize(x) as fmul(x, 1.0)#178439

Maetveis wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

Maetveis:spirv_implement_canonicalizeMaetveis/llvm-project:spirv_implement_canonicalizeCopy head branch name to clipboard