[PATCH] D42741: [X86] Generate testl instruction through truncates.

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix created this revision.
deadalnix added reviewers: craig.topper, niravd, spatel, hfinkel.

This was introduced in https://reviews.llvm.org/D42646 but ended up being reverted because the original implementation was buggy.

Depends on https://reviews.llvm.org/D42646


Repository:
  rL LLVM

https://reviews.llvm.org/D42741

Files:
  lib/Target/X86/X86ISelDAGToDAG.cpp
  test/CodeGen/X86/test-shrink-bug.ll
  test/CodeGen/X86/test-shrink.ll

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