Jakob Stoklund Olesen 6501ea2557 Prefer cheap registers for busy live ranges. ... On the x86-64 and thumb2 targets, some registers are more expensive to encode than others in the same register class. Add a CostPerUse field to the TableGen register description, and make it available from TRI->getCostPerUse. This represents the cost of a REX prefix or a 32-bit instruction encoding required by choosing a high register. Teach the greedy register allocator to prefer cheap registers for busy live ranges (as indicated by spill weight). llvm-svn: 129864		2011-04-20 18:19:48 +00:00
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llvm	Prefer cheap registers for busy live ranges.	2011-04-20 18:19:48 +00:00
llvm-c	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +00:00