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3 Commits

Author SHA1 Message Date
Nikita Popov
6e504d637d [ValueTracking] Handle constant exprs in isKnownNonZero() 
Handle constant expressions by falling through to the general
operator-based code. In particular, this adds support for bitcast
and GEP expressions.
 2022-10-04 11:58:07 +02:00
Bjorn Pettersson
4ab40eca08 [test][InstCombine] Update some test cases to use opaque pointers 
These tests cases were converted using the script at
https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34

Differential Revision: https://reviews.llvm.org/D135094
 2022-10-03 22:17:59 +02:00
Martin Sebor
e263a7670e [InstCombine] Look through more casts when folding memchr and memcmp 
Enhance getConstantDataArrayInfo to let the memchr and memcmp library
call folders look through arbitrarily long sequences of bitcast and
GEP instructions.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D128364
 2022-06-28 15:58:42 -06:00