llvm-project

Commit Graph

Author	SHA1	Message	Date
David Green	01e0f25a9f	[ARM] Fix issue with large xor constants. Fixup to rL325573 for large xor constants. Thanks to Eli Friedman for the catch. Differential revision: https://reviews.llvm.org/D43549 llvm-svn: 325761	2018-02-22 09:38:57 +00:00
David Green	056476497e	[ARM] Mark -1 as cheap in xor's for thumb1 We can always convert xor %a, -1 into MVN, even in thumb 1 where the -1 would not otherwise be considered a cheap constant. This prevents the -1's from being pulled out into constants and potentially hoisted. Differential Revision: https://reviews.llvm.org/D43451 llvm-svn: 325573	2018-02-20 11:07:35 +00:00

Author

SHA1

Message

Date

David Green

01e0f25a9f

[ARM] Fix issue with large xor constants.

Fixup to rL325573 for large xor constants.

Thanks to Eli Friedman for the catch.

Differential revision: https://reviews.llvm.org/D43549

llvm-svn: 325761

2018-02-22 09:38:57 +00:00

David Green

056476497e

[ARM] Mark -1 as cheap in xor's for thumb1

We can always convert xor %a, -1 into MVN, even in thumb 1 where the -1
would not otherwise be considered a cheap constant. This prevents the
-1's from being pulled out into constants and potentially hoisted.

Differential Revision: https://reviews.llvm.org/D43451

llvm-svn: 325573

2018-02-20 11:07:35 +00:00

2 Commits