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| author | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2014-12-23 08:59:45 +0000 |
|---|---|---|
| committer | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2014-12-23 08:59:45 +0000 |
| commit | f4536ea6e8743c34600d88d4329cd0e859b6b19a (patch) | |
| tree | 8022a5c95232d0b14ad17aa4b983ee36c93574c7 /llvm/lib/Target/PowerPC/PPCISelLowering.cpp | |
| parent | 04b16b51ec2903f1be8a4f9297a24e73b0bbda52 (diff) | |
| download | bcm5719-llvm-f4536ea6e8743c34600d88d4329cd0e859b6b19a.tar.gz bcm5719-llvm-f4536ea6e8743c34600d88d4329cd0e859b6b19a.zip | |
[DagCombine] Improve DAGCombiner BUILD_VECTOR when it has two sources of elements
This partially fixes PR21943.
For AVX, we go from:
vmovq (%rsi), %xmm0
vmovq (%rdi), %xmm1
vpermilps $-27, %xmm1, %xmm2 ## xmm2 = xmm1[1,1,2,3]
vinsertps $16, %xmm2, %xmm1, %xmm1 ## xmm1 = xmm1[0],xmm2[0],xmm1[2,3]
vinsertps $32, %xmm0, %xmm1, %xmm1 ## xmm1 = xmm1[0,1],xmm0[0],xmm1[3]
vpermilps $-27, %xmm0, %xmm0 ## xmm0 = xmm0[1,1,2,3]
vinsertps $48, %xmm0, %xmm1, %xmm0 ## xmm0 = xmm1[0,1,2],xmm0[0]
To the expected:
vmovq (%rdi), %xmm0
vmovhpd (%rsi), %xmm0, %xmm0
retq
Fixing this for AVX2 is still open.
Differential Revision: http://reviews.llvm.org/D6749
llvm-svn: 224759
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCISelLowering.cpp')
0 files changed, 0 insertions, 0 deletions
