tree 692319b6a9344d84a2e8916c388be954d8878c41
parent afdcd847498abc0f4e295bece443afabf8aaf868
author Aart Bik <ajcbik@google.com> 1496956018 -0700
committer Aart Bik <ajcbik@google.com> 1498588147 -0700

Unrolling and dynamic loop peeling framework in vectorizer.

Rationale:
This CL introduces the basic framework for dynamically peeling
(to obtain aligned access) and unrolling the vector loop (to reduce
looping overhead and allow more target specific optimizations
on e.g. SIMD loads and stores).

NOTE:
The current heuristics are "bogus" and merely meant to exercise
the new framework. This CL focuses on introducing correct code for
the vectorizer. Heuristics and the memory computations for alignment
are to be implemented later.

Test: test-art-target, test-art-host

Change-Id: I010af1475f42f92fd1daa6a967d7a85922beace8