Jakob Stoklund Olesen 645bdd4b69 Tweak MachineLICM heuristics for cheap instructions. ...

Allow cheap instructions to be hoisted if they are register pressure
neutral or better. This happens if the instruction is the last loop use
of another virtual register.

Only expensive instructions are allowed to increase loop register
pressure.

llvm-svn: 154455

2012-04-11 00:00:28 +00:00

53 KiB

Raw Blame History

View Raw