Skip to content
Commit 5c819eb3 authored by Craig Topper's avatar Craig Topper
Browse files

[RISCV] Form GORCI from (or (rotl/rotr X, Bitwidth/2), X). 

A rotate by half the bitwidth swaps the bottom and top half which is the same as one of the MSB GREVI stage.

We have to do this as a special combine because we prefer to keep (rotl/rotr X, BitWidth/2) as a rotate rather than a single stage GREVI.

Differential Revision: https://reviews.llvm.org/D92286
parent c86c024e
Hide whitespace changes
Inline Side-by-side
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment