Add missing test cases for AST merging of structures.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95886 91177308-0d34-0410-b5e6-96231b3b80d8

test/ASTMerge/Inputs/struct1.c

@@ -0,0 +1,16 @@
+typedef int Int;
+typedef float Float;
+
+struct S0 {
+  Int field1;
+  Float field2;
+};
+
+struct S0 x0;
+
+struct S1 {
+  Int field1;
+  int field2;
+};
+
+struct S1 x1;

test/ASTMerge/Inputs/struct2.c

@@ -0,0 +1,13 @@
+struct S0 {
+  int field1;
+  float field2;
+};
+
+struct S0 x0;
+
+struct S1 {
+  int field1;
+  float field2;
+};
+
+struct S1 x1;

test/ASTMerge/struct.c

@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -emit-pch -o %t.1.ast %S/Inputs/struct1.c
+// RUN: %clang_cc1 -emit-pch -o %t.2.ast %S/Inputs/struct2.c
+// RUN: %clang_cc1 -ast-merge %t.1.ast -ast-merge %t.2.ast -fsyntax-only %s 2>&1 | FileCheck %s
+
+// CHECK: struct2.c:13:11: error: external variable 'x1' declared with incompatible types in different translation units ('struct S1' vs. 'struct S1')
+// CHECK: struct1.c:16:11: note: declared here with type 'struct S1'
+// CHECK: 2 diagnostics