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| author | Nadav Rotem <nadav.rotem@intel.com> | 2012-02-03 13:18:25 +0000 |
|---|---|---|
| committer | Nadav Rotem <nadav.rotem@intel.com> | 2012-02-03 13:18:25 +0000 |
| commit | 7e413e9c94294f17daa64ac9fda09a738e20caa5 (patch) | |
| tree | 12f308bb55bb90e39616f35c56c49dda0597f793 /lib/CodeGen/MachineInstr.cpp | |
| parent | a02556679e685280bd59e0197d9e4aa51d40480c (diff) | |
The type-legalizer often scalarizes code. One of the common patterns is extract-and-truncate.
In this patch we optimize this pattern and convert the sequence into extract op of a narrow type.
This allows the BUILD_VECTOR dag optimizations to construct efficient shuffle operations in many cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149692 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineInstr.cpp')
0 files changed, 0 insertions, 0 deletions