Add a __builtin_object_size test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67688 91177308-0d34-0410-b5e6-96231b3b80d8

test/FrontendC/object_size.c

@@ -0,0 +1,16 @@
+// RUN: %llvmgcc -S -emit-llvm -O1 %s -o - | grep ret | grep {\\-1} | count 1
+// RUN: %llvmgcc -S -emit-llvm -O1 %s -o - | grep ret | grep {0}  | count 1
+// RUN: %llvmgcc -S -emit-llvm -O1 %s -o - | grep ret | grep {8}  | count 1
+
+unsigned t1(void *d) {
+  return __builtin_object_size(d, 0);
+}
+
+unsigned t2(void *d) {
+  return __builtin_object_size(d, 2);
+}
+
+char buf[8];
+unsigned t3() {
+  return __builtin_object_size(buf, 0);
+}