llvm-project

Commit Graph

Author	SHA1	Message	Date
Jonas Paulsson	6c0e6895d0	[SystemZ] Handle NoRegister in SystemZTargetLowering::emitMemMemWrapper(). Bugfix: The compiler should be able to generate a memset to nullptr. Review: Ulrich Weigand	2021-07-19 20:04:44 +02:00
Jonas Paulsson	37a92f3b03	[SystemZ] Generate XC loop for memset 0 of variable length. Benchmarking has shown that it is worthwhile to implement a variable length memset of 0 with XC (exclusive or) like gcc does, instead of using a libcall. This requires the use of the EXecute Relative Long (EXRL) instruction which can now be done in a framework that can also be used with other target instructions (not just XC). Review: Ulrich Weigand Differential Revision: https://reviews.llvm.org/D103865	2021-07-06 18:07:31 +02:00

Author

SHA1

Message

Date

Jonas Paulsson

6c0e6895d0

[SystemZ] Handle NoRegister in SystemZTargetLowering::emitMemMemWrapper().

Bugfix: The compiler should be able to generate a memset to nullptr.

Review: Ulrich Weigand

2021-07-19 20:04:44 +02:00

Jonas Paulsson

37a92f3b03

[SystemZ] Generate XC loop for memset 0 of variable length.

Benchmarking has shown that it is worthwhile to implement a variable length
memset of 0 with XC (exclusive or) like gcc does, instead of using a libcall.

This requires the use of the EXecute Relative Long (EXRL) instruction which
can now be done in a framework that can also be used with other target
instructions (not just XC).

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D103865

2021-07-06 18:07:31 +02:00

2 Commits