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| author | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2015-02-17 08:22:51 +0000 |
|---|---|---|
| committer | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2015-02-17 08:22:51 +0000 |
| commit | ff5acaf50c17689d47848cfc8c3904d39e3760cd (patch) | |
| tree | f839f708d6f5300d048378400e9928c3ff542375 /llvm/lib/ProfileData/InstrProfWriter.cpp | |
| parent | 8c45037eb40ed4feb3507d8af3e82078bbd54abf (diff) | |
| download | bcm5719-llvm-ff5acaf50c17689d47848cfc8c3904d39e3760cd.tar.gz bcm5719-llvm-ff5acaf50c17689d47848cfc8c3904d39e3760cd.zip | |
[X86] Combine vector anyext + and into a vector zext
Vector zext tends to get legalized into a vector anyext, represented as a vector shuffle with an undef vector + a bitcast, that gets ANDed with a mask that zeroes the undef elements.
Combine this into an explicit shuffle with a zero vector instead. This allows shuffle lowering to match it as a zext, instead of matching it as an anyext and emitting an explicit AND.
This combine only covers a subset of the cases, but it's a start.
Differential Revision: http://reviews.llvm.org/D7666
llvm-svn: 229480
Diffstat (limited to 'llvm/lib/ProfileData/InstrProfWriter.cpp')
0 files changed, 0 insertions, 0 deletions
