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3 Commits

Author SHA1 Message Date
Jinsong Ji b7b3d866a4 [PowerPC][NFC] Fix typos in triples 
Found by bzEq (Kai Luo).

llvm-svn: 360643
 2019-05-14 03:11:24 +00:00
Nemanja Ivanovic 87c31a6113 [PowerPC] Do not emit record-form rotates when record-form andi/andis suffices 
This is a follow-up to the previous patch that eliminated some of the rotates.
With this addition, we will also emit the record-form andis.

This patch increases the number of record-form rotates we eliminate by
more than 70%.

Differential revision: https://reviews.llvm.org/D44897

llvm-svn: 342478
 2018-09-18 13:43:16 +00:00
Nemanja Ivanovic 6cc31ca814 [PowerPC] Do not emit record-form rotates when record-form andi suffices 
Up until Power9, the performance profile for rlwinm., rldicl. and andi. looked
more or less equivalent. However with Power9, the rotates are still 2-way
cracked whereas the and-immediate is not.

This patch just ensures that we don't emit record-form rotates when an andi.
is adequate.

As first pointed out by Carrot in https://bugs.llvm.org/show_bug.cgi?id=30833
(this patch is a fix for that PR).

Differential Revision: https://reviews.llvm.org/D43977

llvm-svn: 326736
 2018-03-05 19:27:16 +00:00