Enum LoweringError 

pub enum LoweringError {
    UnsupportedOpcode {
        op: String,
        location: InstLocation,
    },
    UnsupportedType {
        ty: String,
        location: InstLocation,
    },
    UndefinedValue {
        value: Value,
        location: InstLocation,
    },
    BadBlockReference {
        block: Block,
        location: InstLocation,
    },
    MalformedTerminator {
        block_id: LoweredBlockId,
    },
    Rejected {
        reason: String,
        location: InstLocation,
    },
}

Structured errors produced by the Cranelift → LoweredFunction lowering pipeline.

Each variant carries enough context for a maintainer to grep the call site and understand the failure. The wave-2 lowering driver (W2.4) and CraneliftLowerer impl (W2.5) return this error type, which is then mapped into [crate::pliron_dialect::PlironLoweringError] at the trait boundary.

Variants

UnsupportedOpcode

The opcode has no LoweredOp equivalent and isn’t on the reject-list either — this is a “we forgot to wire it up” path. Distinct from LoweringError::Rejected because it indicates a hole, not a deliberate refusal.

Fields

op: String

Cranelift opcode mnemonic.

location: InstLocation

Block + instruction index inside the function, for diagnostics.

UnsupportedType

A Cranelift Value or Block reference resolved to an unsupported type.

Fields

ty: String

Cranelift type as printed via Display.

location: InstLocation

Where the unsupported type appears.

UndefinedValue

An operand Value wasn’t allocated in the LoweringBuilder before use. Indicates a use-before-def in the walker (caller bug, not user input).

Fields

value: Value

The Cranelift Value that wasn’t in the value_map.

location: InstLocation

Where the missing operand appeared.

BadBlockReference

A branch instruction referred to a Block that the walker didn’t visit (so the block_map has no entry).

Fields

block: Block

The unresolved block.

location: InstLocation

Where the branch appears.

MalformedTerminator

A LoweredBlock has no terminator (or has a terminator that isn’t last).

Fields

block_id: LoweredBlockId

The LoweredBlockId of the offending block.

Rejected

The function was hit by the reject-list (W2.1). Carries the first rejection for diagnostics; the full list is available from crate::reject_list.

Fields

reason: String

One-line description of the rejection reason.

location: InstLocation

Where the rejected op appears.

Trait Implementations

impl Clone for LoweringError

fn clone(&self) -> LoweringError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LoweringError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for LoweringError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for LoweringError

impl Error for LoweringError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for LoweringError

fn eq(&self, other: &LoweringError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LoweringError