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cranelift: Add narrower and wider constraints to the instruction DSL (#6013)

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* Add narrower and wider constraints to the instruction DSL

* Add docs to narrower/wider operands

* Update cranelift/codegen/meta/src/cdsl/instructions.rs

Co-authored-by: Jamey Sharp <jamey@minilop.net>

* Fix assertion message

* Simplify upper bounds for the wider constraint

* Remove additional unnecessary cases in the verifier

* Remove unused variables

* Remove changes to is_ctrl_typevar_candidate

These changes were only necessary when the type returned by an
instruction was a variable constrained by narrow or widen. As we have
switched to requiring that constraints must appear on argument types and
not return types, these changes were not longer necessary.

---------

Co-authored-by: Jamey Sharp <jamey@minilop.net>
This commit is contained in:
Trevor Elliott
2023-03-14 09:34:17 -07:00
committed by GitHub
parent 5c1b468648
commit f5ad74e546
6 changed files with 145 additions and 111 deletions
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cranelift/codegen/src/bitset.rs
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@@ -11,7 +11,7 @@ use core::mem::size_of;
use core::ops::{Add, BitOr, Shl, Sub};
/// A small bitset built on a single primitive integer type
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
#[cfg_attr(feature = "enable-serde", derive(serde::Serialize, serde::Deserialize))]
pub struct BitSet<T>(pub T);