Evan Cheng b5fadc47e0 Allow ARM if-converter to be run after post allocation scheduling. ... - This fixed a number of bugs in if-converter, tail merging, and post-allocation scheduler. If-converter now runs branch folding / tail merging first to maximize if-conversion opportunities. - Also changed the t2IT instruction slightly. It now defines the ITSTATE register which is read by instructions in the IT block. - Added Thumb2 specific hazard recognizer to ensure the scheduler doesn't change the instruction ordering in the IT block (since IT mask has been finalized). It also ensures no other instructions can be scheduled between instructions in the IT block. This is not yet enabled. llvm-svn: 106344		2010-06-18 23:09:54 +00:00
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ARM	Allow ARM if-converter to be run after post allocation scheduling.	2010-06-18 23:09:54 +00:00
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Thumb2	Allow ARM if-converter to be run after post allocation scheduling.	2010-06-18 23:09:54 +00:00
X86	Don't maintain a set of deleted nodes; instead, use a HandleSDNode	2010-06-18 01:24:29 +00:00
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