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4 Commits

Author SHA1 Message Date
Chen Zheng 33a61d719c fix comment typo - NFC 
llvm-svn: 350587
 2019-01-08 00:40:01 +00:00
Chen Zheng 4952e668f8 [InstCombine] canonicalize MUL with NEG operand 
-X * Y --> -(X * Y)
X * -Y --> -(X * Y)

Differential Revision: https://reviews.llvm.org/D55961

llvm-svn: 350185
 2019-01-01 01:09:20 +00:00
Sanjay Patel 47579b21e2 [InstCombine] fix complexity canonicalization with fake unary vector ops 
This is a preliminary step to avoid regressions when we add
an actual 'fneg' instruction to IR. See D52934 and D53205.

llvm-svn: 344458
 2018-10-13 16:15:37 +00:00
Sanjay Patel 3d22fbd785 [InstCombine] add tests for operand complexity canonicalization; NFC 
The tests with undef vector elements demonstrate a hole in 
the current pattern matching.

llvm-svn: 344456
 2018-10-13 16:02:47 +00:00