Method prev_block

cranelift/codegen/src/cursor.rs:390–394

Go to the bottom of the previous block in layout order and return it. - If the cursor wasn't pointing at anything, go to the bottom of the last block in the function. - If there are no more blocks, leave the cursor pointing at nothing and return `None`. # Examples The `prev_block()` method is intended for iterating over the blocks in backwards layout order: ``` # use cranelift_codegen::ir::{Fu

(&mut self)

    /// }
    /// ```
    fn prev_block(&mut self) -> Option<ir::Block> {
        let pos = self.prev_block_position();
        self.set_position(pos);
        self.current_block()
    }

    /// Get the position that a `cursor.next_inst()` call would move this cursor
    /// to, but do not update this cursor's position.