Dan Gohman 5a2169ee6e Optimize SelectionDAG's AssignTopologicalOrder even further. ... Completely eliminate the TopOrder std::vector. Instead, sort the AllNodes list in place. This also eliminates the need to call AllNodes.size(), a linear-time operation, before performing the sort. Also, eliminate the Sources temporary std::vector, since it essentially duplicates the sorted result as it is being built. This also changes the direction of the topological sort from bottom-up to top-down. The AllNodes list starts out in roughly top-down order, so this reduces the amount of reordering needed. Top-down is also more convenient for Legalize, and ISel needed only minor adjustments. llvm-svn: 56867		2008-09-30 18:30:35 +00:00
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llvm	Optimize SelectionDAG's AssignTopologicalOrder even further.	2008-09-30 18:30:35 +00:00
llvm-c	Large mechanical patch.	2008-09-25 21:00:45 +00:00