Remove unsupported case "AtomicOps" from AIX test list.

[stevewan]

Summary

The test-suite case AtomicOps.c is unsupported on 32-bit AIX. It fails at link stage and complains about undefined symbol __sync_fetch_and_add_8 and __sync_fetch_and_sub_8. Compilers on the platform are consistent in not supporting these built-ins. An implementation of them would need to use locks.

[hubert.reinterpretcast]

I suggest adding additional context:
Compilers on the platform are consistent in not supporting these built-ins. An implementation of them would need to use locks.

[hubert.reinterpretcast]

Thanks; LGTM.

[daltenty]

LGTM

[stevewan]

Committed in https://github.com/llvm/llvm-test-suite/commit/e4c53876d55063d459790218958c0fe03f0c6e1b.

CMakeLists.txt

if(ARCH STREQUAL "Mips")
   check_symbol_exists(__mips16 "" MIPS_IS_MIPS16_ENABLED)
   check_symbol_exists(__mips64 "" MIPS_IS_MIPS64_ENABLED)
 endif()
 
 # PowerPC/Linux needs -ffp-contract=off so that:
 #     The outputs can be compared to gcc.
 #     The outputs match the reference outputs.
 if(ARCH STREQUAL "PowerPC")
+  check_symbol_exists(_LP64 "" PPC_IS_PPC64_ENABLED)
   add_definitions(-ffp-contract=off)
 endif()
 
 find_program(TEST_SUITE_LIT NAMES "lit" "llvm-lit")
 set(TEST_SUITE_LIT_FLAGS "-sv" CACHE STRING "Flags used when running lit")
 mark_as_advanced(TEST_SUITE_LIT TEST_SUITE_LIT_FLAGS)
 mark_as_advanced(TEST_SUITE_LIT)
 

SingleSource/UnitTests/CMakeLists.txt

 add_subdirectory(C++11)
 add_subdirectory(SignlessTypes)
 add_subdirectory(Threads)
 add_subdirectory(Vector)
 add_subdirectory(Vectorizer)
 # FIXME: Disable SJLJ tests for now, until EH edges are represented.
 # add_subdirectory(SetjmpLongjmp)
 if(TARGET_OS STREQUAL "Darwin")
   add_subdirectory(ObjC)
   add_subdirectory(ObjC++)
 endif()
 
 file(GLOB Source RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.c *.cpp)
+if(TARGET_OS STREQUAL "AIX" AND ARCH STREQUAL "PowerPC" AND NOT PPC_IS_PPC64_ENABLED) 
+  list(REMOVE_ITEM Source AtomicOps.c)
+endif()
 if(TARGET_OS STREQUAL "Darwin")
   list(REMOVE_ITEM Source 2007-04-25-weak.c)
   if(ARCH STREQUAL "PowerPC")
     list(REMOVE_ITEM Source AtomicOps.c)
   endif()
 endif()
 if(ARCH STREQUAL "AArch64")
   list(REMOVE_ITEM Source blockstret.c)