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Sanjay Patel 7b84f5e824 [SimplifyCFG] don't create a no-op subtract
I noticed this inefficiency while investigating PR34603:
https://bugs.llvm.org/show_bug.cgi?id=34603

This fix will likely push another bug (we don't maintain state of 'LateSimplifyCFG') 
into hiding, but I'll try to clean that up with a follow-up patch anyway.

llvm-svn: 313829
2017-09-20 22:31:35 +00:00
2014-03-02 13:08:46 +00:00
2017-08-24 15:40:33 +00:00
2016-01-26 21:29:08 +00:00
2017-09-18 14:33:39 +00:00
2017-01-12 18:02:42 +00:00
2017-08-18 02:39:28 +00:00

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