llvm-project

Author SHA1 Message Date

Author	SHA1	Message	Date
Simon Pilgrim	812e64ef0c	[DAG] MatchRotate - support rotate-by-constant of illegal types Patch to fix some of the regressions in D77804. By folding to rotate/funnel-shift by constant amounts for illegal types, we prevent SimplifyDemandedBits from destroying the patterns prematurely, allowing us to use the rotate/funnel-shift legalization that was added in D112443. Differential Revision: https://reviews.llvm.org/D113192	2021-11-19 11:12:04 +00:00
Kai Luo	9681dc9627	[PowerPC] Exploit `vrl(b\|h\|w\|d)` to perform vector rotation Summary: Currently, we set legalization action of `ISD::ROTL` vectors as `Expand` in `PPCISelLowering`. However, we can exploit `vrl(b\|h\|w\|d)` to lower `ISD::ROTL` directly. Differential Revision: https://reviews.llvm.org/D71324	2019-12-23 03:04:43 +00:00

Simon Pilgrim

812e64ef0c

[DAG] MatchRotate - support rotate-by-constant of illegal types

Patch to fix some of the regressions in D77804.

By folding to rotate/funnel-shift by constant amounts for illegal types, we prevent SimplifyDemandedBits from destroying the patterns prematurely, allowing us to use the rotate/funnel-shift legalization that was added in D112443.

Differential Revision: https://reviews.llvm.org/D113192

2021-11-19 11:12:04 +00:00

Kai Luo

9681dc9627

[PowerPC] Exploit vrl(b|h|w|d) to perform vector rotation

Summary:
Currently, we set legalization action of `ISD::ROTL` vectors as
`Expand` in `PPCISelLowering`. However, we can exploit `vrl(b|h|w|d)`
to lower `ISD::ROTL` directly.

Differential Revision: https://reviews.llvm.org/D71324

2019-12-23 03:04:43 +00:00

2 Commits