Method replace_inst

cranelift/codegen/src/cursor.rs:573–577

Replace the instruction under the cursor with `new_inst`. The cursor is left pointing at the new instruction. The old instruction that was replaced is returned.

(&mut self, new_inst: ir::Inst)

    ///
    /// The old instruction that was replaced is returned.
    fn replace_inst(&mut self, new_inst: ir::Inst) -> ir::Inst {
        let prev_inst = self.remove_inst();
        self.insert_inst(new_inst);
        prev_inst
    }

    /// Insert a block at the current position and switch to it.
    ///