tree c3ba062c746a58d8745c220f4b9fe6d09ad74fa4
parent 76a73b5b308c9940ccb64e105aeb0be9cfc406db
author Matt Arsenault <Matthew.Arsenault@amd.com> 1454948899 +0000
committer Matt Arsenault <Matthew.Arsenault@amd.com> 1454948899 +0000

SelectionDAG: Lower some range metadata to AssertZext

If a range has a lower bound of 0, add an AssertZext from the
nearest floor power of two.

This allows operations with some workitem intrinsics with known
maximum ranges to use fast 24-bit multiplies.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260109 91177308-0d34-0410-b5e6-96231b3b80d8