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Commit Graph

Author	SHA1	Message	Date
Yonghong Song	6b8baf3062	[BPF] turn on -mattr=+alu32 for cpu version v3 and later -mattr=+alu32 has shown good performance vs. without this attribute. Based on discussion at https://lore.kernel.org/bpf/1ec37838-966f-ec0b-5223-ca9b6eb0860d@fb.com/T/#t cpu version v3 should support -mattr=+alu32. This patch enabled alu32 if cpu version is v3, either specified by user or probed by the llvm. Differential Revision: https://reviews.llvm.org/D69957	2019-11-07 22:08:46 -08:00
Yonghong Song	c4ca879fac	bpf: New codegen testcases for 32-bit subregister support This patch adds some unit tests for 32-bit subregister support. We want to make sure ALU32, subregister load/store and new peephole optimization are truely enabled once -mattr=+alu32 specified. Signed-off-by: Jiong Wang <jiong.wang@netronome.com> Reviewed-by: Yonghong Song <yhs@fb.com> llvm-svn: 325992	2018-02-23 23:49:33 +00:00

Author

SHA1

Message

Date

Yonghong Song

6b8baf3062

[BPF] turn on -mattr=+alu32 for cpu version v3 and later

-mattr=+alu32 has shown good performance vs. without this attribute.
Based on discussion at
  https://lore.kernel.org/bpf/1ec37838-966f-ec0b-5223-ca9b6eb0860d@fb.com/T/#t
cpu version v3 should support -mattr=+alu32.
This patch enabled alu32 if cpu version is v3, either specified by user
or probed by the llvm.

Differential Revision: https://reviews.llvm.org/D69957

2019-11-07 22:08:46 -08:00

Yonghong Song

c4ca879fac

bpf: New codegen testcases for 32-bit subregister support

This patch adds some unit tests for 32-bit subregister support.
We want to make sure ALU32, subregister load/store and new peephole
optimization are truely enabled once -mattr=+alu32 specified.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
llvm-svn: 325992

2018-02-23 23:49:33 +00:00

2 Commits