From 7b422c195618608db45f440996d85b0388b3fa55 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Sat, 5 Sep 2009 00:34:14 +0000
Subject: [PATCH] Detect VLAs. Do not use DenseMap operator[] because it
 inserts new entry if lookup fails. Use find() to check an entry in a DenseMap
 first.

llvm-svn: 81058
---
 lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 555ef9e1b0a..cd05f7124d2 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -3981,7 +3981,11 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     // Don't handle byval struct arguments or VLAs, for example.
     if (!AI)
       return 0;
-    int FI = FuncInfo.StaticAllocaMap[AI];
+    DenseMap<const AllocaInst*, int>::iterator SI =
+      FuncInfo.StaticAllocaMap.find(AI);
+    if (SI == FuncInfo.StaticAllocaMap.end()) 
+      return 0; // VLAs.
+    int FI = SI->second;
     DW->RecordVariable(cast<MDNode>(Variable), FI);
     return 0;
   }