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5 Commits

Author SHA1 Message Date
Nikita Popov 10cb23c6ca [InstCombine] Fold cttz of abs intrinsic 
Same as the existing fold for SPF_ABS. We don't need to explicitly
handle the NABS variant, as we'll first fold away the neg in that
case.
 2020-09-05 12:25:41 +02:00
Nikita Popov 1903a1afd9 [InstCombine] Add tests for cttz of abs intrinsic (NFC) 2020-09-05 12:22:42 +02:00
David Bolvansky 4b28478389 [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
 2019-06-21 15:26:22 +00:00
David Bolvansky e0c1c3baf9 [NFC] Updated tests for D63546 
llvm-svn: 363967
 2019-06-20 19:30:56 +00:00
David Bolvansky 21fd232385 [NFC] Added tests for cttz(abs(x)) -> cttz(x) fold 
llvm-svn: 363795
 2019-06-19 12:55:39 +00:00