From ef56d3dcee041e1b8fd3db5dc3c91b53190f497a Mon Sep 17 00:00:00 2001
From: rzvxa <rzvxa@protonmail.com>
Date: Thu, 30 May 2024 21:40:33 +0330
Subject: [PATCH] improvement: better reachablity API.

---
 .../src/rules/react/rules_of_hooks.rs           |  7 +------
 crates/oxc_semantic/examples/cfg.rs             |  3 ++-
 crates/oxc_semantic/src/control_flow/mod.rs     | 17 ++++++++---------
 3 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/crates/oxc_linter/src/rules/react/rules_of_hooks.rs b/crates/oxc_linter/src/rules/react/rules_of_hooks.rs
index b9fc7c03e00d35..fce19e4f33a5c1 100644
--- a/crates/oxc_linter/src/rules/react/rules_of_hooks.rs
+++ b/crates/oxc_linter/src/rules/react/rules_of_hooks.rs
@@ -228,12 +228,7 @@ impl Rule for RulesOfHooks {
             return;
         }
 
-        if !petgraph::algo::has_path_connecting(
-            &semantic.cfg().graph,
-            func_cfg_id,
-            node_cfg_id,
-            None,
-        ) {
+        if !ctx.semantic().cfg().is_reachabale(func_cfg_id, node_cfg_id) {
             // There should always be a control flow path between a parent and child node.
             // If there is none it means we always do an early exit before reaching our hook call.
             // In some cases it might mean that we are operating on an invalid `cfg` but in either
diff --git a/crates/oxc_semantic/examples/cfg.rs b/crates/oxc_semantic/examples/cfg.rs
index 0ab461b0ad188a..1817d925b84a7c 100644
--- a/crates/oxc_semantic/examples/cfg.rs
+++ b/crates/oxc_semantic/examples/cfg.rs
@@ -111,7 +111,8 @@ fn main() -> std::io::Result<()> {
                     }
                 });
                 format!(
-                    "xlabel = \"nodes [{}]\\l\", label = \"bb{}\n{}\"",
+                    "xlabel = \"nodes{} [{}]\\l\", label = \"bb{}\n{}\"",
+                    node.1,
                     nodes,
                     node.1,
                     semantic.semantic.cfg().basic_blocks[*node.1]
diff --git a/crates/oxc_semantic/src/control_flow/mod.rs b/crates/oxc_semantic/src/control_flow/mod.rs
index 715dea363f7df9..e609ed7c3b7b0b 100644
--- a/crates/oxc_semantic/src/control_flow/mod.rs
+++ b/crates/oxc_semantic/src/control_flow/mod.rs
@@ -197,17 +197,16 @@ impl ControlFlowGraph {
         let graph = &self.graph;
         depth_first_search(&self.graph, Some(from), |event| match event {
             DfsEvent::TreeEdge(a, b) => {
-                if b == to {
-                    return Control::Break(true);
-                }
-
-                let test = graph.edges_connecting(a, b).all(|edge| {
-                    !matches!(edge.weight(), EdgeType::NewFunction | EdgeType::Unreachable)
+                let unreachable = graph.edges_connecting(a, b).all(|edge| {
+                    matches!(edge.weight(), EdgeType::NewFunction | EdgeType::Unreachable)
                 });
-                if test {
-                    Control::Continue
-                } else {
+
+                if unreachable {
                     Control::Prune
+                } else if b == to {
+                    return Control::Break(true);
+                } else {
+                    Control::Continue
                 }
             }
             _ => Control::Continue,