[PATCH] D38001: [X86] Don't select anyext GR32->GR64 to SUBREG_TO_REG. Use INSERT_SUBREG instead.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

I havent' found any piece of code that analyzes SUB_REG_TO_REG that closely. Everything I found pretty much treats it much like a copy. Does anyone know of anything that cares today?


https://reviews.llvm.org/D38001