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Commit Graph

6 Commits

Author SHA1 Message Date
Benjamin Kramer
6cd9b2ba74 Fix some CHECK lines which were ignored by accident.
llvm-svn: 91214
2009-12-12 09:25:50 +00:00
Nick Lewycky
10693e2bb0 Generalize this optimization to work on equality comparisons between any two
integers that are constant except for a single bit (the same n-th bit in each).

llvm-svn: 90646
2009-12-05 05:00:00 +00:00
Nick Lewycky
9d1ee635e3 Reapply r88830 with a bugfix: this transform only applies to icmp eq/ne. This
fixes part of PR5438.

llvm-svn: 89639
2009-11-23 03:17:33 +00:00
Nick Lewycky
f05946faff Revert r88830 and r88831 which appear to have caused a selfhost buildbot some
grief. I suspect this patch merely exposed a bug else.

llvm-svn: 88841
2009-11-15 07:47:32 +00:00
Nick Lewycky
62f00c17eb Correct typo.
llvm-svn: 88831
2009-11-15 06:16:57 +00:00
Nick Lewycky
14a2122db3 Teach instcombine to look for booleans in wider integers when it encounters a
zext(icmp). It may be able to optimize that away. This fixes one of the cases
in PR5438.

llvm-svn: 88830
2009-11-15 05:55:17 +00:00