[PATCH] D40036: [ConstantRange] Support subtraction in makeGuaranteedNoWrapRegion.

[Joel Galenson via Phabricator via llvm-commits]

jgalenson created this revision.

Previously ConstantRange::makeGuaranteedNoWrapRegion only handled addition.  This adds support for subtraction.


https://reviews.llvm.org/D40036

Files:
  include/llvm/IR/ConstantRange.h
  lib/IR/ConstantRange.cpp
  unittests/IR/ConstantRangeTest.cpp

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