Method is_loop_header

cranelift/codegen/src/loop_analysis.rs:124–127

Determine if a Block is a loop header. If so, return the loop.

(&self, block: Block)

    /// Determine if a Block is a loop header. If so, return the loop.
    pub fn is_loop_header(&self, block: Block) -> Option<Loop> {
        self.innermost_loop(block)
            .filter(|&lp| self.loop_header(lp) == block)
    }

    /// Determine if a Block belongs to a loop by running a finger along the loop tree.
    ///