Method optimize

cranelift/codegen/src/context.rs:151–190

Optimize the function, performing all compilation steps up to but not including machine-code lowering and register allocation. Public only for testing purposes.

(
        &mut self,
        isa: &dyn TargetIsa,
        ctrl_plane: &mut ControlPlane,
    )

    ///
    /// Public only for testing purposes.
    pub fn optimize(
        &mut self,
        isa: &dyn TargetIsa,
        ctrl_plane: &mut ControlPlane,
    ) -> CodegenResult<()> {
        log::debug!(
            "Number of CLIF instructions to optimize: {}",
            self.func.dfg.num_insts()
        );
        log::debug!(
            "Number of CLIF blocks to optimize: {}",
            self.func.dfg.num_blocks()
        );

        let opt_level = isa.flags().opt_level();
        crate::trace!(
            "Optimizing (opt level {:?}):\n{}",
            opt_level,
            self.func.display()
        );

        if isa.flags().enable_nan_canonicalization() {
            self.canonicalize_nans(isa)?;
        }

        self.legalize(isa)?;

        self.compute_cfg();
        self.compute_domtree();
        self.eliminate_unreachable_code(isa)?;
        self.remove_constant_phis(isa)?;

        self.func.dfg.resolve_all_aliases();

        if opt_level != OptLevel::None {
            self.egraph_pass(isa, ctrl_plane)?;
        }

        Ok(())
    }

    /// Perform function call inlining.
    ///