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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-09-18 16:45:05 +0000 |
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| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-09-18 16:45:05 +0000 |
| commit | 0b21ef1fa3d9d5796f05f3d6c64379c6fc35a9b2 (patch) | |
| tree | f9706bcb452da2ac803194c3e918703895f76034 /llvm/tools/llvm-cov/SourceCoverageViewText.cpp | |
| parent | 77d7f331dd6c5b3e484adeb00f456a06678c4ff5 (diff) | |
| download | llvm-0b21ef1fa3d9d5796f05f3d6c64379c6fc35a9b2.zip llvm-0b21ef1fa3d9d5796f05f3d6c64379c6fc35a9b2.tar.gz llvm-0b21ef1fa3d9d5796f05f3d6c64379c6fc35a9b2.tar.bz2 | |
[SelectionDAG] Add BITCAST handling to ComputeNumSignBits for splatted sign bits.
For cases where we are BITCASTing to vectors of smaller elements, then if the entire source was a splatted sign (src's NumSignBits == SrcBitWidth) we can say that the dst's NumSignBit == DstBitWidth, as we're just splitting those sign bits across multiple elements.
We could generalize this but at the moment the only use case I have is to peek through bitcasts to vector comparison results.
Differential Revision: https://reviews.llvm.org/D37849
llvm-svn: 313543
Diffstat (limited to 'llvm/tools/llvm-cov/SourceCoverageViewText.cpp')
0 files changed, 0 insertions, 0 deletions