Cranelift: Consider shifts as "simple" arithmetic in egraph cost model (#5646)

2023-01-27 16:30:42 -08:00
parent b47006d432
commit ffbcc67eb3
1 changed files with 4 additions and 1 deletions
--- a/cranelift/codegen/src/egraph/cost.rs
+++ b/cranelift/codegen/src/egraph/cost.rs
@@ -90,7 +90,10 @@ pub(crate) fn pure_op_cost(op: Opcode) -> Cost {
        | Opcode::BorNot
        | Opcode::Bxor
        | Opcode::BxorNot
-        | Opcode::Bnot => Cost(2),
+        | Opcode::Bnot
+        | Opcode::Ishl
+        | Opcode::Ushr
+        | Opcode::Sshr => Cost(2),
        // Everything else (pure.)
        _ => Cost(3),
    }