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| author | Craig Topper <craig.topper@intel.com> | 2018-06-04 19:28:09 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2018-06-04 19:28:09 +0000 |
| commit | 95ed88a1a93cdc15cf02e25849a6b5a8c2be3bb8 (patch) | |
| tree | 35767485dad9ea7a3588cf993ba3f4a7c1cc382c /llvm/lib | |
| parent | da661e9236bd0f23fe8ab9a4ee491702d4044657 (diff) | |
| download | bcm5719-llvm-95ed88a1a93cdc15cf02e25849a6b5a8c2be3bb8.tar.gz bcm5719-llvm-95ed88a1a93cdc15cf02e25849a6b5a8c2be3bb8.zip | |
[X86] Avoid passing _mm_undefined* to builtin_shufflevector if we are able to pass the first input a second time.
This is more consistent with other usages of builtin_shufflevector. Later optimization passes or codegen will detect the duplicate vector and replace it with undef. Using _mm_undefined just puts a zeroinitializer that still needs to be optimized out later.
llvm-svn: 333944
Diffstat (limited to 'llvm/lib')
0 files changed, 0 insertions, 0 deletions
