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[InstCombine] cttz(abs(x)) -> cttz(x)
authorDavid Bolvansky <david.bolvansky@gmail.com>
Fri, 21 Jun 2019 15:26:22 +0000 (15:26 +0000)
committerDavid Bolvansky <david.bolvansky@gmail.com>
Fri, 21 Jun 2019 15:26:22 +0000 (15:26 +0000)
commit4b284783898cacd36a1f2bc8a849278bf3a0d57c
treeafd421f6b803bfb1467a69f56d8a2200d677a026tree | snapshot
parent000f25a37e76317aa78b0f6dd9283ba41af94591commit | diff
[InstCombine] cttz(abs(x)) -> cttz(x)

Summary: Signedness does not change number of trailing zeros.

Reviewers: spatel, lebedev.ri, nikic

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D63546

llvm-svn: 364064
llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp diff | blob | history
llvm/test/Transforms/InstCombine/cttz-abs.ll diff | blob | history
Domain: System / Toolchain;