[PATCH] D14931: [Support] Add optional argument to SaturatingAdd() and SaturatingMultiply() to indicate that overflow occurred

[Nathan Slingerland via llvm-commits]

slingn created this revision.
slingn added reviewers: davidxl, silvas, rsmith.
slingn added a subscriber: llvm-commits.

Adds the ability for callers to detect when saturation occurred on the result of saturating addition/multiplication.

http://reviews.llvm.org/D14931

Files:
  include/llvm/Support/MathExtras.h
  unittests/Support/MathExtrasTest.cpp

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