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* [x86, AVX] allow explicit calls to VZERO* to modify state in ↵Sanjay Patel2016-05-251-5/+2
| | | | | | | | | | VZeroUpperInserter pass (PR27823) As noted in the review, there are still problems, so this doesn't the bug completely. Differential Revision: http://reviews.llvm.org/D20529 llvm-svn: 270718
* [X86][AVX] Added tests that access ymm registers before and after explicit ↵Simon Pilgrim2016-05-231-6/+60
| | | | | | vzeroupper/vzeroall calls llvm-svn: 270434
* [x86, AVX] add test file to show vzeroupper pass excessesSanjay Patel2016-05-221-0/+43
llvm-svn: 270375
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