tree ae28f2ffd9c173e2685ed4bc2c147aae3feeeb76
parent 858afb3c22144027bcd8ba75e27262eede093a60
author Michael Gottesman <mgottesman@apple.com> 1358199870 +0000
committer Michael Gottesman <mgottesman@apple.com> 1358199870 +0000

Multiprecision subtraction builtins.

We lower these into 2x chained usub.with.overflow intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172476 91177308-0d34-0410-b5e6-96231b3b80d8