From 64f23918992bc99d8a0b4418f9787bc78cfd2975 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 16 Jul 2013 20:19:04 +0000
Subject: [PATCH] Fix crash on complex constant zero.

Fixes <rdar://problem/14442543>.

llvm-svn: 186452
---
 clang/lib/CodeGen/CGExprComplex.cpp | 6 +++---
 clang/test/CodeGen/complex.c        | 3 +++
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp
index e4b2f3b3fb42..796c55a4bdbc 100644
--- a/clang/lib/CodeGen/CGExprComplex.cpp
+++ b/clang/lib/CodeGen/CGExprComplex.cpp
@@ -114,9 +114,9 @@ public:
       if (result.isReference())
         return EmitLoadOfLValue(result.getReferenceLValue(CGF, E));
 
-      llvm::ConstantStruct *pair =
-        cast<llvm::ConstantStruct>(result.getValue());
-      return ComplexPairTy(pair->getOperand(0), pair->getOperand(1));
+      llvm::Constant *pair = result.getValue();
+      return ComplexPairTy(pair->getAggregateElement(0U),
+                           pair->getAggregateElement(1U));
     }
     return EmitLoadOfLValue(E);
   }
diff --git a/clang/test/CodeGen/complex.c b/clang/test/CodeGen/complex.c
index e99a7152813a..206db253caa4 100644
--- a/clang/test/CodeGen/complex.c
+++ b/clang/test/CodeGen/complex.c
@@ -95,3 +95,6 @@ double t7(double _Complex c) {
 void t8() {
   __complex__ int *x = &(__complex__ int){1};
 }
+
+const _Complex double test9const = 0;
+_Complex double test9func() { return test9const; }