5 Commits

Author	SHA1	Message	Date
Chris Lattner	82ce325f16	reapply: Use the new TB_NOT_REVERSABLE flag instead of special ... reapply: reimplement the second half of the or/add optimization. We should now with no changes. Turns out that one missing "Defs = [EFLAGS]" can upset things a bit. llvm-svn: 116040	2010-10-08 03:57:25 +00:00
Daniel Dunbar	983fae5a86	Revert "reimplement the second half of the or/add optimization. We should now", ... which depends on r116007, which I am about to revert. llvm-svn: 116031	2010-10-08 02:07:26 +00:00
Chris Lattner	7577cb7b49	reimplement the second half of the or/add optimization. We should now ... only end up emitting LEA instead of OR. If we aren't able to promote something into an LEA, we should never be emitting it as an ADD. Add some testcases that we emit "or" in cases where we used to produce an "add". llvm-svn: 116026	2010-10-08 01:05:10 +00:00
Evan Cheng	bd938ebc90	Extend r93152 to work on OR r, r. If the source set bits are known not to overlap, then select as an ADD instead. ... llvm-svn: 93191	2010-01-11 22:03:29 +00:00
Evan Cheng	ee806a0db5	Select an OR with immediate as an ADD if the input bits are known zero. This allow the instruction to be 3address-fied if needed. ... llvm-svn: 93152	2010-01-11 17:03:47 +00:00