tree f44fecaca2192446e34cccb8ac99c9f36c703e79
parent 0bb4d46b2be5edd58621416de72e995cd6dd7ec4
author Nikita Popov <nikita.ppv@gmail.com> 1560588532 +0000
committer Nikita Popov <nikita.ppv@gmail.com> 1560588532 +0000

[SimplifyIndVar] Simplify non-overflowing saturating add/sub

If we can detect that saturating math that depends on an IV cannot
overflow, replace it with simple math. This is similar to the CVP
optimization from D62703, just based on a different underlying
analysis (SCEV vs LVI) that catches different cases.

Differential Revision: https://reviews.llvm.org/D62792

llvm-svn: 363489