Add sub/mul overflow intrinsics. This currently doesn't have a
target-independent way of determining overflow on multiplication. It's very
tricky. Patch by Zoltan Varga!

llvm-svn: 60800
15 files changed
tree: 843d7a6d39783475665f6d334f01c0515e5d93d1
  1. clang/
  2. llvm/