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| author | Philip Reames <listmail@philipreames.com> | 2015-10-29 03:19:10 +0000 |
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| committer | Philip Reames <listmail@philipreames.com> | 2015-10-29 03:19:10 +0000 |
| commit | dbbd77921d93235bbda8c970e6a696318ce37a2b (patch) | |
| tree | 40bce255f0f7bd9abc917059f961595f911c8389 /clang/lib/Driver/CrossWindowsToolChain.cpp | |
| parent | 846e3e41edc04dbc8fdc14e24420bfe28cdfded3 (diff) | |
| download | bcm5719-llvm-dbbd77921d93235bbda8c970e6a696318ce37a2b.tar.gz bcm5719-llvm-dbbd77921d93235bbda8c970e6a696318ce37a2b.zip | |
[InstSimplify] sgt on i1s also encodes implication
Follow on to http://reviews.llvm.org/D13074, implementing something pointed out by Sanjoy. His truth table from his comment on that bug summarizes things well:
LHS | RHS | LHS >=s RHS | LHS implies RHS
0 | 0 | 1 (0 >= 0) | 1
0 | 1 | 1 (0 >= -1) | 1
1 | 0 | 0 (-1 >= 0) | 0
1 | 1 | 1 (-1 >= -1) | 1
The key point is that an "i1 1" is the value "-1", not "1".
Differential Revision: http://reviews.llvm.org/D13756
llvm-svn: 251597
Diffstat (limited to 'clang/lib/Driver/CrossWindowsToolChain.cpp')
0 files changed, 0 insertions, 0 deletions
