Added missing exports

[jtsoftware]

Summary

It seems these exports are needed.

[silvas]

The more interesting issue here is why having a submodule export itself causes a change in behavior.

[silvas]

It turns out that Module::buildVisibleModulesCache just recursively calls Module::getExportedModules. So without the self-export, the submodule doesn't export anything and contributes no exports, but if it does export itself, then it contributes itself to the list of exports.

In this case, e.g. #include <x86intrin.h> will trigger module intel to be imported, and since that module imports wmmintrin.h (through immintrin.h), then the aforementioned situation triggers.

[jtsoftware]

It turns out that these are the exports needed, since the wmmintrin.h file includes the aes and pclmul headers.

[silvas]

This makes more sense. LGTM.

• Sean Silva

lib/Headers/module.modulemap

explicit module xop {
       requires xop
       export fma4
       header "xopintrin.h"
     }
 
     explicit module aes_pclmul {
       requires aes, pclmul
       header "wmmintrin.h"
+      export aes
+      export pclmul
     }
 
     explicit module aes {
       requires aes
       header "__wmmintrin_aes.h"
     }
 
     explicit module pclmul {