llvm-project

Commit Graph

Author	SHA1	Message	Date
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
Ehsan Amiri	a538b0f023	Adding -verify-machineinstrs option to PowerPC tests Currently we have a number of tests that fail with -verify-machineinstrs. To detect this cases earlier we add the option to the testcases with the exception of tests that will currently fail with this option. PR 27456 keeps track of this failures. No code review, as discussed with Hal Finkel. llvm-svn: 277624	2016-08-03 18:17:35 +00:00
Kyle Butt	613112826e	Codegen: [PPC] Word Rotates are Zero Extending. Add Word rotates to the list of instructions that are zero extending. This allows them to be used in dot form to compare with zero. llvm-svn: 264183	2016-03-23 19:51:22 +00:00

Author

SHA1

Message

Date

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

Ehsan Amiri

a538b0f023

Adding -verify-machineinstrs option to PowerPC tests

Currently we have a number of tests that fail with -verify-machineinstrs.
To detect this cases earlier we add the option to the testcases with the
exception of tests that will currently fail with this option. PR 27456 keeps
track of this failures.

No code review, as discussed with Hal Finkel.

llvm-svn: 277624

2016-08-03 18:17:35 +00:00

Kyle Butt

613112826e

Codegen: [PPC] Word Rotates are Zero Extending.

Add Word rotates to the list of instructions that are zero extending.
This allows them to be used in dot form to compare with zero.

llvm-svn: 264183

2016-03-23 19:51:22 +00:00

3 Commits