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Author SHA1 Message Date
Andrew Trick
ceeb35bbb8 misched: Analysis that partitions the DAG into subtrees. 
This is a simple, cheap infrastructure for analyzing the shape of a
DAG. It recognizes uniform DAGs that take the shape of bottom-up
subtrees, such as the included matrix multiplication example. This is
useful for heuristics that balance register pressure with ILP. Two
canonical expressions of the heuristic are implemented in scheduling
modes: -misched-ilpmin and -misched-ilpmax.

llvm-svn: 168773
 2012-11-28 05:13:28 +00:00
Andrew Trick
98bb349721 misched: rename ScheduleDAGILP to ScheduleDFS to prepare for other heuristics. 
llvm-svn: 168772
 2012-11-28 05:13:24 +00:00