[PATCH] D37890: [X86] Don't emit COPY_TO_REG to ABCD registers before EXTRACT_SUBREG of sub_8bit

Craig Topper via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Sep 18 10:08:05 PDT 2017

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craig.topper added a comment.

Ran with ENABLE_EXPENSIVE_CHECKS and  llvm.X86TargetMachine.isMachineVerifierClean  and got the same failures as PR27481


https://reviews.llvm.org/D37890

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