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Author SHA1 Message Date
Adam Nemet b1d026f0fe [opt-diff] Fix the case when the script is invoked with directories 
llvm-svn: 297055
 2017-03-06 19:15:22 +00:00
Adam Nemet 6ab2d4891e New tool: opt-diff.py 
This tool allows generating the different between two optimization record
files.  The result is a YAML file too that can be visualized with opt-viewer.

This is very useful to see what optimization were added and removed by a
change.

llvm-svn: 296767
 2017-03-02 17:00:59 +00:00