[PATCH] D60669: [APInt] Use __builtin_[su]mulll_overflow for [su]mul_ov if available

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: nikic, RKSimon.
Herald added subscribers: llvm-commits, kristina, dexonsmith.
Herald added a project: LLVM.

Repository:
  rL LLVM

https://reviews.llvm.org/D60669

Files:
  lib/Support/APInt.cpp
  unittests/ADT/APIntTest.cpp

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