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Commit b7f90bd9 authored by Nadav Rotem's avatar Nadav Rotem
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SelectionDAG compile time improvement. 

One of the phases of SelectionDAG is LegalizeVectors. We don't need to sort the DAG and copy nodes around if there are no vector ops.

Speeds up the compilation time of SelectionDAG on a big scalar workload by ~8%.

llvm-svn: 175929
parent 6533a765
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