Fix implicit initialization of structures.

<rdar://problem/6113085>


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54237 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 28 insertions, 0 deletions

diff --git a/test/CodeGen/2008-07-30-implicit-initialization.c b/test/CodeGen/2008-07-30-implicit-initialization.c
new file mode 100644
index 0000000000..ee33b6d70c
--- /dev/null
+++ b/test/CodeGen/2008-07-30-implicit-initialization.c
@@ -0,0 +1,28 @@
+// RUN: clang --emit-llvm-bc -o - %s | opt --std-compile-opts | llvm-dis > %t &&
+// RUN: grep "ret i32" %t | count 2 &&
+// RUN: grep "ret i32 0" %t | count 2
+// <rdar://problem/6113085>
+
+struct s0 {
+  int x, y;
+};
+
+int f0() {
+  struct s0 x = {0};
+  return x.y;
+}
+
+#if 0
+/* Optimizer isn't smart enough to reduce this since we use
+   memset. Hrm. */
+int f1() {
+  struct s0 x[2] = { {0} };
+  return x[1].x;
+}
+#endif
+
+int f2() {
+  int x[2] = { 0 };
+  return x[1];
+}
+