Struct cranelift_codegen::isa::RecipeConstraints

pub struct RecipeConstraints {
    pub ins: &'static [OperandConstraint],
    pub outs: &'static [OperandConstraint],
    pub fixed_ins: bool,
    pub fixed_outs: bool,
    pub tied_ops: bool,
    pub clobbers_flags: bool,
}

Value operand constraints for an encoding recipe.

Fields

ins: &'static [OperandConstraint]

Constraints for the instruction's fixed value operands.

If the instruction takes a variable number of operands, the register constraints for those operands must be computed dynamically.

• For branches and jumps, EBB arguments must match the expectations of the destination EBB.
• For calls and returns, the calling convention ABI specifies constraints.

outs: &'static [OperandConstraint]

Constraints for the instruction's fixed results.

If the instruction produces a variable number of results, it's probably a call and the constraints must be derived from the calling convention ABI.

fixed_ins: bool

Are any of the input constraints FixedReg or FixedTied?

fixed_outs: bool

Are any of the output constraints FixedReg or FixedTied?

tied_ops: bool

Are any of the input/output constraints Tied (but not FixedTied)?

clobbers_flags: bool

Does this instruction clobber the CPU flags?

When true, SSA values of type iflags or fflags can not be live across the instruction.

Methods

impl RecipeConstraints

pub fn satisfied(
    &self,
    inst: Inst,
    divert: &RegDiversions,
    func: &Function
) -> bool

Check that these constraints are satisfied by the operands on inst.

Trait Implementations

impl PartialEq<RecipeConstraints> for RecipeConstraints

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Clone for RecipeConstraints

fn clone(&self) -> RecipeConstraints

Returns a copy of the value.

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

Performs copy-assignment from source.