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[InstCombine] cttz(-x) -> cttz(x)
authorDavid Bolvansky <david.bolvansky@gmail.com>
Thu, 20 Jun 2019 17:04:14 +0000 (17:04 +0000)
committerDavid Bolvansky <david.bolvansky@gmail.com>
Thu, 20 Jun 2019 17:04:14 +0000 (17:04 +0000)
commite392e54cc90689ff8f2ea0498c4e5e5815c0f762
treef006e69105da6ff310740bbc6050de3040cad409tree | snapshot
parentf27469b850ae226b206bae5e74f919b5f775d3d5commit | diff
[InstCombine] cttz(-x) -> cttz(x)

Summary: Signedness does not change number of trailing zeros.

Reviewers: spatel, lebedev.ri, nikic

Reviewed By: spatel

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D63534

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363951 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/InstCombine/InstCombineCalls.cpp diff | blob | history
test/Transforms/InstCombine/cttz-negative.ll diff | blob | history
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