[C++20] [Modules] Avoid crash if the inconsistency the size of lang options exceeds 1
Close https://github.com/llvm/llvm-project/issues/62359
The root reason for the crash is that we didn't test the case that
the bits number of a language option exceeds 1.
diff --git a/clang/test/Modules/pr62359.cppm b/clang/test/Modules/pr62359.cppm
new file mode 100644
index 0000000..4632457
--- /dev/null
+++ b/clang/test/Modules/pr62359.cppm
@@ -0,0 +1,43 @@
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: split-file %s %t
+//
+// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/Hello.cppm -o %t/Hello.pcm
+// RUN: not %clang_cc1 -std=c++20 -fopenmp %t/use.cpp -fmodule-file=hello=%t/Hello.pcm -fsyntax-only \
+// RUN: 2>&1 | FileCheck %t/use.cpp
+// RUN: not %clang_cc1 -std=c++20 -fopenmp %t/use2.cpp -fmodule-file=hello=%t/Hello.pcm -fsyntax-only \
+// RUN: 2>&1 | FileCheck %t/use2.cpp
+//
+// RUN: %clang_cc1 -std=c++20 -fopenmp -emit-module-interface %t/Hello.cppm -o %t/Hello.pcm
+// RUN: %clang_cc1 -std=c++20 -fopenmp %t/use.cpp -fmodule-file=hello=%t/Hello.pcm -fsyntax-only -verify
+// RUN: %clang_cc1 -std=c++20 -fopenmp %t/use2.cpp -fmodule-file=hello=%t/Hello.pcm -fsyntax-only -verify
+
+//--- Hello.cppm
+export module hello;
+export void hello() {
+
+}
+
+//--- use.cpp
+// expected-no-diagnostics
+import hello;
+int use() {
+ for(int i=0;i<10;i++)
+ hello();
+ return 0;
+}
+
+// CHECK: OpenMP{{.*}}differs in PCH file vs. current file
+
+//--- use2.cpp
+// expected-no-diagnostics
+import hello;
+int use2() {
+#pragma omp parallel for
+ for(int i=0;i<10;i++)
+ hello();
+ return 0;
+}
+
+// CHECK: OpenMP{{.*}}differs in PCH file vs. current file
+// CHECK: use of undeclared identifier 'pragma'
