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| author | Sanjay Patel <spatel@rotateright.com> | 2015-01-29 20:51:49 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2015-01-29 20:51:49 +0000 |
| commit | 4f07a56958fa1a26024d1f43bd8cc1dee8816d5e (patch) | |
| tree | efde8ddb6fe3fcb584af2ba4d25d3ed4ff17b549 /llvm/lib/Object/ELF.cpp | |
| parent | 03b968e89874e4fe8f76f6b7f2345086d353f962 (diff) | |
| download | bcm5719-llvm-4f07a56958fa1a26024d1f43bd8cc1dee8816d5e.tar.gz bcm5719-llvm-4f07a56958fa1a26024d1f43bd8cc1dee8816d5e.zip | |
[GVN] don't propagate equality comparisons of FP zero (PR22376)
In http://reviews.llvm.org/D6911, we allowed GVN to propagate FP equalities
to allow some simple value range optimizations. But that introduced a bug
when comparing to -0.0 or 0.0: these compare equal even though they are not
bitwise identical.
This patch disallows propagating zero constants in equality comparisons.
Fixes: http://llvm.org/bugs/show_bug.cgi?id=22376
Differential Revision: http://reviews.llvm.org/D7257
llvm-svn: 227491
Diffstat (limited to 'llvm/lib/Object/ELF.cpp')
0 files changed, 0 insertions, 0 deletions
