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| author | Sanjay Patel <spatel@rotateright.com> | 2014-08-20 20:34:56 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2014-08-20 20:34:56 +0000 |
| commit | bba72c7c1e2144031245e9cb0d3109a34c7d0f88 (patch) | |
| tree | 90afadafd8b9f2a9bf3b2369cd34223ef20df4e7 /llvm/lib/CodeGen/DFAPacketizer.cpp | |
| parent | 7bb10f8a857fa78548e891f9f8c32cef2a0f20bb (diff) | |
| download | llvm-bba72c7c1e2144031245e9cb0d3109a34c7d0f88.zip llvm-bba72c7c1e2144031245e9cb0d3109a34c7d0f88.tar.gz llvm-bba72c7c1e2144031245e9cb0d3109a34c7d0f88.tar.bz2 | |
Don't prevent a vselect of constants from becoming a single load (PR20648).
Fix for PR20648 - http://llvm.org/bugs/show_bug.cgi?id=20648
This patch checks the operands of a vselect to see if all values are constants.
If yes, bail out of any further attempts to create a blend or shuffle because
SelectionDAGLegalize knows how to turn this kind of vselect into a single load.
This already happens for machines without SSE4.1, so the added checks just send
more targets down that path.
Differential Revision: http://reviews.llvm.org/D4934
llvm-svn: 216121
Diffstat (limited to 'llvm/lib/CodeGen/DFAPacketizer.cpp')
0 files changed, 0 insertions, 0 deletions