1 files changed, 27 insertions, 0 deletions
diff --git a/test/Modules/resolution-change.m b/test/Modules/resolution-change.m
new file mode 100644
index 000000000000..011782eec2bf
--- /dev/null
+++ b/test/Modules/resolution-change.m
@@ -0,0 +1,27 @@
+// RUN: rm -rf %t
+
+// Build PCH using A from path 1
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -I %S/Inputs/modules-with-same-name/DependsOnA -I %S/Inputs/modules-with-same-name/path1/A -emit-pch -o %t-A.pch %s
+
+// Use the PCH with the same header search options; should be fine
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -I %S/Inputs/modules-with-same-name/DependsOnA -I %S/Inputs/modules-with-same-name/path1/A -include-pch %t-A.pch %s -fsyntax-only -Werror
+
+// Different -W options are ok
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -I %S/Inputs/modules-with-same-name/DependsOnA -I %S/Inputs/modules-with-same-name/path1/A -include-pch %t-A.pch %s -fsyntax-only -Werror -Wauto-import
+
+// Use the PCH with no way to resolve DependsOnA
+// RUN: not %clang_cc1 -fmodules -fmodules-cache-path=%t -include-pch %t-A.pch %s -fsyntax-only 2>&1 | FileCheck -check-prefix=CHECK-NODOA %s
+// CHECK-NODOA: module 'DependsOnA' imported by AST file '{{.*A.pch}}' not found
+
+// Use the PCH with no way to resolve A
+// RUN: not %clang_cc1 -fmodules -fmodules-cache-path=%t -I %S/Inputs/modules-with-same-name/DependsOnA -include-pch %t-A.pch %s -fsyntax-only 2>&1 | FileCheck -check-prefix=CHECK-NOA %s
+// CHECK-NOA: module 'A' imported by AST file '{{.*DependsOnA.*pcm}}' not found
+
+// Use the PCH and have it resolve the the other A
+// RUN: not %clang_cc1 -fmodules -fmodules-cache-path=%t -I %S/Inputs/modules-with-same-name/DependsOnA -I %S/Inputs/modules-with-same-name/path2/A -include-pch %t-A.pch %s -fsyntax-only 2>&1 | FileCheck -check-prefix=CHECK-WRONGA %s
+// CHECK-WRONGA: module 'A' imported by AST file '{{.*DependsOnA.*pcm}}' found in a different module map file ({{.*path2.*}}) than when the importing AST file was built ({{.*path1.*}})
+
+#ifndef HEADER
+#define HEADER
+@import DependsOnA;
+#endif