diff --git a/test/CodeGen/pointer-arithmetic.c b/test/CodeGen/pointer-arithmetic.c
index 3133c9e..23a6ab4 100644
--- a/test/CodeGen/pointer-arithmetic.c
+++ b/test/CodeGen/pointer-arithmetic.c
@@ -1,7 +1,22 @@
-// RUN: clang -emit-llvm %s -o %t
+// RUN: clang -S %s -o %t
 
 typedef int Int;
 
-int test1(int *a, Int *b) { return a - b; }
+int f0(int *a, Int *b) { return a - b; }
 
-int test2(const char *a, char *b) { return b - a; }
+int f1(const char *a, char *b) { return b - a; }
+
+// GNU extensions
+typedef void (*FP)(void);
+void *f2(void *a, int b) { return a + b; }
+void *f2_1(void *a, int b) { return (a += b); }
+void *f3(int a, void *b) { return a + b; }
+void *f3_1(int a, void *b) { return (a += b); }
+void *f4(void *a, int b) { return a - b; }
+void *f4_1(void *a, int b) { return (a -= b); }
+FP f5(FP a, int b) { return a + b; }
+FP f5_1(FP a, int b) { return (a += b); }
+FP f6(int a, FP b) { return a + b; }
+FP f6_1(int a, FP b) { return (a += b); }
+FP f7(FP a, int b) { return a - b; }
+FP f7_1(FP a, int b) { return (a -= b); }