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Author SHA1 Message Date
Philip Reames e499bc3042 [instsimplify] consistently handle undef and out of bound indices for insertelement and extractelement 
In one case, we were handling out of bounds, but not undef indices.  In the other, we were handling undef (with the comment making the analogy to out of bounds), but not out of bounds.  Be consistent and treat both undef and constant out of bounds indices as producing undefined results.

As a side effect, this also protects instcombine from having to handle large constant indices as we always simplify first.

llvm-svn: 321575
 2017-12-30 05:54:22 +00:00
Igor Laevsky e0edb66475 Reintroduce r320049, r320014 and r319894. 
OpenGL issues should be fixed by now.

llvm-svn: 320568
 2017-12-13 11:21:18 +00:00
Igor Laevsky d63560b817 Revert r320049, r320014 and r319894 
They were causing failures of the piglit OpenGL tests with AMD GPUs using the
Mesa radeonsi driver.

llvm-svn: 320466
 2017-12-12 10:03:39 +00:00
Igor Laevsky 54d1ff0a58 [InstSimplify] Add tests for the rL319894 
Differential Revision: https://reviews.llvm.org/D40650

llvm-svn: 320014
 2017-12-07 08:52:24 +00:00