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[GISel][NFC]: Add methods to speed up insertion into GISelWorklist

Description

[GISel][NFC]: Add methods to speed up insertion into GISelWorklist

https://reviews.llvm.org/D58073

Speed up insertion during the initial populating phase into the
GISelWorkList by deferring repeatedly resizing the DenseMap.
This results in ~10% improvement in the combiner passes, and
~3% speedup in the Legalizer.

reviewed by: aemerson.

Details

Committed
aditya_nandakumarFeb 14 2019, 5:37 PM
Parents
rL354092: [libFuzzer] print new functions as they are discovered in the fork mode
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