| commit | 1a2e90199f83e7e3a7267b8fa9715d87ed5b2f88 | |
| author | Kerry McLaughlin <kerry.mclaughlin@arm.com> | |
| Wed, 13 Oct 2021 09:24:43 +0000 (13 10:24 +0100) | ||
| committer | Kerry McLaughlin <kerry.mclaughlin@arm.com> | |
| Wed, 13 Oct 2021 10:36:15 +0000 (13 11:36 +0100) | ||
| tree | 3578b6977ab7c38707b0e5f219f9d4538de3cb67 | treesnapshot (tar.gz zip) |
| parent | 93fd30a1632743d377d8c6525401074ef9eca562 | commitdiff |
[SVE][CodeGen] Add patterns for ADD/SUB + element count
This patch adds patterns to match the following with INC/DEC:
- @llvm.aarch64.sve.cnt[b|h|w|d] intrinsics + ADD/SUB
- vscale + ADD/SUB
For some implementations of SVE, INC/DEC VL is not as cheap as ADD/SUB and
so this behaviour is guarded by the "use-scalar-inc-vl" feature flag, which for SVE
is off by default. There are no known issues with SVE2, so this feature is
enabled by default when targeting SVE2.
Reviewed By: david-arm
Differential Revision: https://reviews.llvm.org/D111441
This patch adds patterns to match the following with INC/DEC:
- @llvm.aarch64.sve.cnt[b|h|w|d] intrinsics + ADD/SUB
- vscale + ADD/SUB
For some implementations of SVE, INC/DEC VL is not as cheap as ADD/SUB and
so this behaviour is guarded by the "use-scalar-inc-vl" feature flag, which for SVE
is off by default. There are no known issues with SVE2, so this feature is
enabled by default when targeting SVE2.
Reviewed By: david-arm
Differential Revision: https://reviews.llvm.org/D111441
16 files changed: