Add block names to irreducible-control-flow error

2023-02-12 13:53:03 -08:00 · 2023-02-12 13:53:03 -08:00 · ec2a999359
parent f17164f56f
commit ec2a999359
1 changed files with 7 additions and 1 deletions
--- a/src/backend/stackify.rs
+++ b/src/backend/stackify.rs
@ -129,7 +129,13 @@ impl<'a, 'b> Context<'a, 'b> {
                log::trace!(" -> succ rpo {}", succ_rpo);
                if succ_rpo <= block_rpo {
                    if !cfg.dominates(succ, block) {
-                        anyhow::bail!("Irreducible control flow: edge from {} to {}", block, succ);
+                        anyhow::bail!(
+                            "Irreducible control flow: edge from {} ({}) to {} ({})",
+                            block,
+                            body.blocks[block].desc,
+                            succ,
+                            body.blocks[succ].desc
+                        );
                    }
                    // Backward branch.
                    loop_headers.insert(succ);