Dan Gohman 2980d9da45 This patch extends the LoopUnroll pass to be able to unroll loops ... with unknown trip counts. This is left off by default, and a command-line option enables it. It also begins to separate loop unrolling into a utility routine; eventually it might be made usable from other passes. It currently works by inserting conditional branches between each unrolled iteration, unless it proves that the trip count is a multiple of a constant integer > 1, which it currently only does in the rare case that the trip count expression is a Mul operator with a ConstantInt operand. Eventually this information might be provided by other sources, for example by a pass that peels/splits the loop for this purpose. llvm-svn: 36990		2007-05-11 20:53:41 +00:00
llvm	This patch extends the LoopUnroll pass to be able to unroll loops	2007-05-11 20:53:41 +00:00
stacker	Regenerate.	2007-05-08 15:23:37 +00:00