From: Arnaud A. de Grandmaison <arnaud.degrandmaison@arm.com>
Date: Tue, 21 Oct 2014 16:24:21 +0000 (+0000)
Subject: [PBQP] Check for out of bound access in DEBUG builds
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0dea74b06930ef51704ef643dee4d4bd52789bc8;p=platform%2Fupstream%2Fllvm.git

[PBQP] Check for out of bound access in DEBUG builds

It is just too easy to use a virtual register intead of a NodeId without a
compiler warning. This does not fix the fundamental problem, i.e. both
have the same underlying types, but increases the likelyhood to detect it.

llvm-svn: 220303
---

diff --git a/llvm/include/llvm/CodeGen/PBQP/Graph.h b/llvm/include/llvm/CodeGen/PBQP/Graph.h
index ca461b9..3b826d6 100644
--- a/llvm/include/llvm/CodeGen/PBQP/Graph.h
+++ b/llvm/include/llvm/CodeGen/PBQP/Graph.h
@@ -190,8 +190,14 @@ namespace PBQP {
 
     // ----- INTERNAL METHODS -----
 
-    NodeEntry& getNode(NodeId NId) { return Nodes[NId]; }
-    const NodeEntry& getNode(NodeId NId) const { return Nodes[NId]; }
+    NodeEntry &getNode(NodeId NId) {
+      assert(NId < Nodes.size() && "Out of bound NodeId");
+      return Nodes[NId];
+    }
+    const NodeEntry &getNode(NodeId NId) const {
+      assert(NId < Nodes.size() && "Out of bound NodeId");
+      return Nodes[NId];
+    }
 
     EdgeEntry& getEdge(EdgeId EId) { return Edges[EId]; }
     const EdgeEntry& getEdge(EdgeId EId) const { return Edges[EId]; }