llvm-project

Commit Graph

Author	SHA1	Message	Date
Rong Xu	3573d8da36	[CodeGen] Peel off the dominant case in switch statement in lowering This patch peels off the top case in switch statement into a branch if the probability exceeds a threshold. This will help the branch prediction and avoids the extra compares when lowering into chain of branches. Differential Revision: http://reviews.llvm.org/D39262 llvm-svn: 318202	2017-11-14 21:44:09 +00:00
Jonas Paulsson	fc4f323ac1	[SystemZ] Add the CoveredBySubRegs bit to GPR64, GPR128 and FPR128 registers. This bit is needed in order for the CalleeSavedRegs list to automatically include the super registers if all of their subregs are present. Thanks to Wei Mi for initially indicating this deficiency in the SystemZ backend. Review: Ulrich Weigand. https://bugs.llvm.org/show_bug.cgi?id=34550 llvm-svn: 313023	2017-09-12 12:11:29 +00:00

Author

SHA1

Message

Date

Rong Xu

3573d8da36

[CodeGen] Peel off the dominant case in switch statement in lowering

This patch peels off the top case in switch statement into a branch if the
probability exceeds a threshold. This will help the branch prediction and
avoids the extra compares when lowering into chain of branches.

Differential Revision: http://reviews.llvm.org/D39262

llvm-svn: 318202

2017-11-14 21:44:09 +00:00

Jonas Paulsson

fc4f323ac1

[SystemZ] Add the CoveredBySubRegs bit to GPR64, GPR128 and FPR128 registers.

This bit is needed in order for the CalleeSavedRegs list to automatically
include the super registers if all of their subregs are present.

Thanks to Wei Mi for initially indicating this deficiency in the SystemZ
backend.

Review: Ulrich Weigand.
https://bugs.llvm.org/show_bug.cgi?id=34550

llvm-svn: 313023

2017-09-12 12:11:29 +00:00

2 Commits