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| author | Nate Begeman <natebegeman@mac.com> | 2009-04-27 18:41:29 +0000 |
|---|---|---|
| committer | Nate Begeman <natebegeman@mac.com> | 2009-04-27 18:41:29 +0000 |
| commit | 9008ca6b6b4f638cfafccb593cbc5b1d3f5ab877 (patch) | |
| tree | 0b13ccb79eb37ff6bb74f3be7234826602c7aff1 /lib/CodeGen/SelectionDAG/LegalizeTypes.cpp | |
| parent | c167cac8f0f0227de08422563844bcb889a4f3dd (diff) | |
2nd attempt, fixing SSE4.1 issues and implementing feedback from duncan.
PR2957
ISD::VECTOR_SHUFFLE now stores an array of integers representing the shuffle
mask internal to the node, rather than taking a BUILD_VECTOR of ConstantSDNodes
as the shuffle mask. A value of -1 represents UNDEF.
In addition to eliminating the creation of illegal BUILD_VECTORS just to
represent shuffle masks, we are better about canonicalizing the shuffle mask,
resulting in substantially better code for some classes of shuffles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70225 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeTypes.cpp')
0 files changed, 0 insertions, 0 deletions