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3 Commits

Author SHA1 Message Date
Dan Gohman ce3d6248b2 Add tests for existing InstSimplify features. 
llvm-svn: 143721
 2011-11-04 18:39:16 +00:00
Dan Gohman 85977e6ab4 Teach instsimplify to simplify calls to undef. 
llvm-svn: 143719
 2011-11-04 18:32:42 +00:00
Dan Gohman 54664ed714 Improve constant folding of undef for cmp and select operators. 
llvm-svn: 134223
 2011-07-01 01:03:43 +00:00