Method emit_set_local

winch/codegen/src/codegen/mod.rs:540–555

Pops the value at the stack top and assigns it to the local at the given index, returning the typed register holding the source value.

(&mut self, index: u32)

    /// the given index, returning the typed register holding the
    /// source value.
    pub fn emit_set_local(&mut self, index: u32) -> Result<TypedReg> {
        // Materialize any references to the same local index that are in the
        // value stack by spilling.
        if self.context.stack.contains_latent_local(index) {
            self.context.spill(self.masm)?;
        }
        let src = self.context.pop_to_reg(self.masm, None)?;
        // Need to get address of local after `pop_to_reg` since `pop_to_reg`
        // will pop the machine stack causing an incorrect address to be
        // calculated.
        let (ty, addr) = self.context.frame.get_local_address(index, self.masm)?;
        self.masm
            .store(RegImm::reg(src.reg), addr, ty.try_into()?)?;

        Ok(src)
    }

    /// Loads the address of the given global.
    pub fn emit_get_global_addr(&mut self, index: GlobalIndex) -> Result<(WasmValType, Reg, u32)> {