[X86] Replace VPCOM/VPCOMU with generic integer comparisons (llvm)

These intrinsics can always be replaced with generic integer comparisons without any regression in codegen, even for -O0/-fast-isel cases.

Noticed while cleaning up vector integer comparison costs for PR40376.

A future commit will remove/autoupgrade the existing VPCOM/VPCOMU llvm intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351688 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed