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| author | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | 2014-05-22 16:21:39 +0000 |
|---|---|---|
| committer | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | 2014-05-22 16:21:39 +0000 |
| commit | c8dd1ad85b217880fa092eeb890c703de61be007 (patch) | |
| tree | 222062fd89ed03d00fab50c937b9b6e22426b797 /llvm/lib/CodeGen/EarlyIfConversion.cpp | |
| parent | dad4acbc52403cf8cfc32970d8295b8191e43802 (diff) | |
| download | bcm5719-llvm-c8dd1ad85b217880fa092eeb890c703de61be007.tar.gz bcm5719-llvm-c8dd1ad85b217880fa092eeb890c703de61be007.zip | |
[X86] Improve the lowering of BITCAST from MVT::f64 to MVT::v4i16/MVT::v8i8.
This patch teaches the x86 backend how to efficiently lower ISD::BITCAST dag
nodes from MVT::f64 to MVT::v4i16 (and vice versa), and from MVT::f64 to
MVT::v8i8 (and vice versa).
This patch extends the logic from revision 208107 to also handle MVT::v4i16
and MVT::v8i8. Also, this patch correctly propagates Undef values when
performing the widening of a vector (example: when widening from v2i32 to
v4i32, the upper 64bits of the resulting vector are 'undef').
llvm-svn: 209451
Diffstat (limited to 'llvm/lib/CodeGen/EarlyIfConversion.cpp')
0 files changed, 0 insertions, 0 deletions
