[modules] Fix iterator invalidation issue with names being added to a module
while we're writing out the identifier table.
llvm-svn: 231890
diff --git a/clang/test/Modules/Inputs/invalidate-identifiers/a.h b/clang/test/Modules/Inputs/invalidate-identifiers/a.h
new file mode 100644
index 0000000..16fe9ed
--- /dev/null
+++ b/clang/test/Modules/Inputs/invalidate-identifiers/a.h
@@ -0,0 +1,17 @@
+// Ensure that loading 'i' introduces enough identifiers to cause the
+// identifier table to be reallocated.
+#define TYPEDEFS(x) typedef x##0 x; typedef x##1 x;
+#define DEPTH_0(x) DEPTH_1(x##0) DEPTH_1(x##1) TYPEDEFS(x)
+#define DEPTH_1(x) DEPTH_2(x##0) DEPTH_2(x##1) TYPEDEFS(x)
+#define DEPTH_2(x) DEPTH_3(x##0) DEPTH_3(x##1) TYPEDEFS(x)
+#define DEPTH_3(x) DEPTH_4(x##0) DEPTH_4(x##1) TYPEDEFS(x)
+#define DEPTH_4(x) DEPTH_5(x##0) DEPTH_5(x##1) TYPEDEFS(x)
+#define DEPTH_5(x) DEPTH_6(x##0) DEPTH_6(x##1) TYPEDEFS(x)
+#define DEPTH_6(x) DEPTH_7(x##0) DEPTH_7(x##1) TYPEDEFS(x)
+#define DEPTH_7(x) DEPTH_8(x##0) DEPTH_8(x##1) TYPEDEFS(x)
+#define DEPTH_8(x) DEPTH_9(x##0) DEPTH_9(x##1) TYPEDEFS(x)
+#define DEPTH_9(x) DEPTH_A(x##0) DEPTH_A(x##1) TYPEDEFS(x)
+#define DEPTH_A(x) DEPTH_B(x##0) DEPTH_B(x##1) TYPEDEFS(x)
+#define DEPTH_B(x) typedef int x;
+DEPTH_0(i)
+extern i v;
diff --git a/clang/test/Modules/Inputs/invalidate-identifiers/b.h b/clang/test/Modules/Inputs/invalidate-identifiers/b.h
new file mode 100644
index 0000000..2af246d
--- /dev/null
+++ b/clang/test/Modules/Inputs/invalidate-identifiers/b.h
@@ -0,0 +1,2 @@
+extern int v;
+#include "a.h"
diff --git a/clang/test/Modules/Inputs/invalidate-identifiers/module.modulemap b/clang/test/Modules/Inputs/invalidate-identifiers/module.modulemap
new file mode 100644
index 0000000..a365682
--- /dev/null
+++ b/clang/test/Modules/Inputs/invalidate-identifiers/module.modulemap
@@ -0,0 +1,2 @@
+module a { header "a.h" }
+module b { header "b.h" }