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4 Commits

Author SHA1 Message Date
Chad Rosier a72a9ff557 [ValueTracking] Support icmps fed by 'and' and 'or'. 
This patch adds support for handling some forms of ands and ors in
ValueTracking's isImpliedCondition API.

PR33611
https://reviews.llvm.org/D34901

llvm-svn: 307304
 2017-07-06 20:00:25 +00:00
Chad Rosier 25cfb7dbd6 [ValueTracking] Improve isImpliedCondition for matching LHS and Imm RHSs. 
llvm-svn: 268636
 2016-05-05 15:39:18 +00:00
Balaram Makam 569eaec5f3 "Reapply r268521 "[InstCombine] Canonicalize icmp instructions based on dominating conditions."" 
This reapplies commit r268521, that was reverted in r268530 due to a test failure in select-implied.ll
Modified the test case to reflect the new change.

llvm-svn: 268557
 2016-05-04 21:32:14 +00:00
Chad Rosier cd62bf5821 [InstCombine] Determine the result of a select based on a dominating condition. 
Differential Revision: http://reviews.llvm.org/D19550

llvm-svn: 268104
 2016-04-29 21:12:31 +00:00