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| author | Craig Topper <craig.topper@intel.com> | 2018-02-05 16:54:07 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2018-02-05 16:54:07 +0000 |
| commit | 57e06431600f60df5831bf3d8315fedac360ca22 (patch) | |
| tree | 2d190b4f1d3767104d4ee5258dff7e960267f297 /llvm/lib/IR/ModuleSummaryIndex.cpp | |
| parent | 22db17cf4334b028fe13e37ed7957eff2ae01ea9 (diff) | |
| download | llvm-57e06431600f60df5831bf3d8315fedac360ca22.zip llvm-57e06431600f60df5831bf3d8315fedac360ca22.tar.gz llvm-57e06431600f60df5831bf3d8315fedac360ca22.tar.bz2 | |
[X86] Teach X86DAGToDAGISel::shrinkAndImmediate to preserve upper 32 zeroes of a 64 bit mask.
If the upper 32 bits of a 64 bit mask are all zeros, we have special isel patterns to use a 32-bit and instead of a 64-bit and by relying on the impliciting zeroing of 32 bit ops.
This patch teachs shrinkAndImmediate not to break that optimization.
Differential Revision: https://reviews.llvm.org/D42899
llvm-svn: 324249
Diffstat (limited to 'llvm/lib/IR/ModuleSummaryIndex.cpp')
0 files changed, 0 insertions, 0 deletions