5 Commits

Author	SHA1	Message	Date
Evan Cheng	4760ff0763	Use a bigger hammer to fix PR11314 by disabling the "forcing two-address ... instruction lower optimization" in the pre-RA scheduler. The optimization, rather the hack, was done before MI use-list was available. Now we should be able to implement it in a better way, perhaps in the two-address pass until a MI scheduler is available. Now that the scheduler has to backtrack to handle call sequences. Adding artificial scheduling constraints is just not safe. Furthermore, the hack is not taking all the other scheduling decisions into consideration so it's just as likely to pessimize code. So I view disabling this optimization goodness regardless of PR11314. llvm-svn: 144267	2011-11-10 07:43:16 +00:00
Andrew Trick	e1d5ae73ac	LSR: rewrite inner loops only. ... Rewriting the entire loop nest now requires -enable-lsr-nested. See PR11035 for some performance data. A few unit tests specifically test nested LSR, and are now under a flag. llvm-svn: 140762	2011-09-29 01:33:38 +00:00
Chandler Carruth	df1690a113	FileCheck-ize, tightening checks and avoiding a temporary file. ... llvm-svn: 134341	2011-07-02 20:42:42 +00:00
Dan Gohman	df2896d609	Eliminate more uses of llvm-as and llvm-dis. ... llvm-svn: 81290	2009-09-08 23:54:48 +00:00
Dan Gohman	e1a532cb4f	Permit ChangeCompareStride to rewrite a comparison when the factor ... between the comparison's iv stride and the candidate stride is exactly -1. llvm-svn: 70244	2009-04-27 20:35:32 +00:00