Disable EHFrameSupport in JITLink/RuntimeDyld on AIX

[daltenty]

Summary

EH Frames aren't supported on AIX with the system compiler, but the definition of HAVE_EHTABLE_SUPPORT misses this which causes linking problems on AIX. This patch updates the definition of HAVE_EHTABLE_SUPPORT in both JITLink and RuntimeDyld.

[xingxue]

LGTM.

llvm/trunk/lib/ExecutionEngine/JITLink/EHFrameSupport.cpp

Error addEHFrame(AtomGraph &G, Section &EHFrameSection,
                  Edge::Kind FDEToTargetRelocKind) {
   return EHFrameParser(G, EHFrameSection, EHFrameContent, EHFrameAddress,
                        FDEToCIERelocKind, FDEToTargetRelocKind)
       .atomize();
 }
 
 // Determine whether we can register EH tables.
 #if (defined(__GNUC__) && !defined(__ARM_EABI__) && !defined(__ia64__) &&      \
-     !defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__))
+     !(defined(_AIX) && defined(__ibmxl__)) && !defined(__SEH__) &&            \
+     !defined(__USING_SJLJ_EXCEPTIONS__))
 #define HAVE_EHTABLE_SUPPORT 1
 #else
 #define HAVE_EHTABLE_SUPPORT 0
 #endif
 
 #if HAVE_EHTABLE_SUPPORT
 extern "C" void __register_frame(const void *);
 extern "C" void __deregister_frame(const void *);

llvm/trunk/lib/ExecutionEngine/RuntimeDyld/RTDyldMemoryManager.cpp

#ifdef __linux__
   #include <unistd.h>
 #endif
 
 namespace llvm {
 
 RTDyldMemoryManager::~RTDyldMemoryManager() {}
 
 // Determine whether we can register EH tables.
-#if (defined(__GNUC__) && !defined(__ARM_EABI__) && !defined(__ia64__) && \
-     !defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__))
+#if (defined(__GNUC__) && !defined(__ARM_EABI__) && !defined(__ia64__) &&      \
+     !(defined(_AIX) && defined(__ibmxl__)) && !defined(__SEH__) &&            \
+     !defined(__USING_SJLJ_EXCEPTIONS__))
 #define HAVE_EHTABLE_SUPPORT 1
 #else
 #define HAVE_EHTABLE_SUPPORT 0
 #endif
 
 #if HAVE_EHTABLE_SUPPORT
 extern "C" void __register_frame(void *);
 extern "C" void __deregister_frame(void *);