[CIR] Upstream CIR codegen for vec_ext x86 builtins#167942

andykaylor merged 3 commits intollvm:mainllvm/llvm-project:mainfrom

Thibault-Monnier:cir-vec-ext-codegenThibault-Monnier/llvm-project:cir-vec-ext-codegenCopy head branch name to clipboard