4 Commits

Author	SHA1	Message	Date
Dan Gohman	fa0e6facc7	Fix reassociate to postpone certain instruction deletions until ... after it has finished all of its reassociations, because its habit of unlinking operands and holding them in a datastructure while working means that it's not easy to determine when an instruction is really dead until after all its regular work is done. rdar://9096268. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127424 91177308-0d34-0410-b5e6-96231b3b80d8	2011-03-10 19:51:54 +00:00
Chris Lattner	893075f46e	fix a nice subtle reassociate bug which would only occur ... in a very specific use pattern embodied in the carefully reduced testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97794 91177308-0d34-0410-b5e6-96231b3b80d8	2010-03-05 07:18:54 +00:00
Chris Lattner	c2d1b6949c	only factor from expressions whose uses are empty and whose ... base is the right expression type. This fixes PR5981. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93045 91177308-0d34-0410-b5e6-96231b3b80d8	2010-01-09 06:01:36 +00:00
Chris Lattner	5f94af0f72	fix an infinite loop in reassociate building emacs. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92679 91177308-0d34-0410-b5e6-96231b3b80d8	2010-01-05 04:55:35 +00:00