From 745da3a5bb4ea35f93f50301e7fbbb7d78d3b6bb Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Fri, 24 Sep 2010 17:30:16 +0000
Subject: Patch implements passing arrays to functions expecting vla.
 Implements pr7827.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114737 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenFunction.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/CodeGen/CodeGenFunction.cpp')

diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index c2016e8386..5e301b5218 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -625,6 +625,9 @@ llvm::Value *CodeGenFunction::EmitVLASize(QualType Ty) {
   EnsureInsertPoint();
 
   if (const VariableArrayType *VAT = getContext().getAsVariableArrayType(Ty)) {
+    // unknown size indication requires no size computation.
+    if (!VAT->getSizeExpr())
+      return 0;
     llvm::Value *&SizeEntry = VLASizeMap[VAT->getSizeExpr()];
 
     if (!SizeEntry) {
-- 
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