4 Commits

Author	SHA1	Message	Date
Dan Gohman	154ed49784	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. llvm-svn: 127424	2011-03-10 19:51:54 +00:00
Chris Lattner	c6c1523f59	fix a nice subtle reassociate bug which would only occur ... in a very specific use pattern embodied in the carefully reduced testcase. llvm-svn: 97794	2010-03-05 07:18:54 +00:00
Chris Lattner	ab7087ad66	only factor from expressions whose uses are empty and whose ... base is the right expression type. This fixes PR5981. llvm-svn: 93045	2010-01-09 06:01:36 +00:00
Chris Lattner	f741d72b84	fix an infinite loop in reassociate building emacs. ... llvm-svn: 92679	2010-01-05 04:55:35 +00:00