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| author | Craig Topper <craig.topper@gmail.com> | 2017-04-03 20:41:47 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2017-04-03 20:41:47 +0000 |
| commit | 1604f0773ba1d7e07083e8d31eec6ec88ccec2c8 (patch) | |
| tree | 8f54aa8eeeb545f54dcc2dc06eebc4051f5e98a9 /llvm/lib/DebugInfo/CodeView/ModuleSubstream.cpp | |
| parent | 0389f62879fc9162fae12e57b93ae3565c915356 (diff) | |
| download | bcm5719-llvm-1604f0773ba1d7e07083e8d31eec6ec88ccec2c8.tar.gz bcm5719-llvm-1604f0773ba1d7e07083e8d31eec6ec88ccec2c8.zip | |
[InstCombine] Remove canonicalization for (X & C1) | C2 --> (X | C2) & (C1|C2) when C1 & C2 have common bits.
It turns out that SimplifyDemandedInstructionBits will get called earlier and remove bits from C1 first. Effectively doing (X & (C1&C2)) | C2. So by the time it got to this check there could be no common bits.
I think the DAGCombiner has the same check but its check can be executed because it handles demanded bits later. I'll look at it next.
llvm-svn: 299384
Diffstat (limited to 'llvm/lib/DebugInfo/CodeView/ModuleSubstream.cpp')
0 files changed, 0 insertions, 0 deletions
