tree 6539b8c4d5342ba6ec0c8a2ada87d8a799c161e6
parent 2167f91530897b37c933b7fdde675b5926c7d037
author Hans Wennborg <hans@hanshq.net> 1537951310 +0000
committer Hans Wennborg <hans@hanshq.net> 1537951310 +0000

Revert r342870 "[ARM] bottom-top mul support ARMParallelDSP"

This broke Chromium's Android build (https://crbug.com/889390) and the
polly-aosp buildbot
(http://lab.llvm.org:8011/builders/aosp-O3-polly-before-vectorizer-unprofitable).

> Originally committed in rL342210 but was reverted in rL342260 because
> it was causing issues in vectorized code, because I had forgotten to
> ensure that we're operating on scalar values.
>
> Original commit message:
>
> On failing to find sequences that can be converted into dual macs,
> try to find sequential 16-bit loads that are used by muls which we
> can then use smultb, smulbt, smultt with a wide load.
>
> Differential Revision: https://reviews.llvm.org/D51983

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343082 91177308-0d34-0410-b5e6-96231b3b80d8