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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
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