[Sanitizer] Disable -Wframe-larger-than on SystemZ

[kianm]

Summary

These warnings are showing up on the SystemZ build bots [http://lab.llvm.org:8011/builders/clang-s390x-linux-multistage/builds/6366/steps/build%20stage%202/logs/warnings%20%2810%29]:

/home/uweigand/sandbox/buildbot/clang-s390x-linux-multistage/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc:534:50: warning: stack frame size of 616 bytes in function 'sanitizer::SuspendedThreadsListLinux::GetRegistersAndSP' [-Wframe-larger-than=]
1 warning generated.
/home/uweigand/sandbox/buildbot/clang-s390x-linux-multistage/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_allocator_primary32.h:340:8: warning: stack frame size of 592 bytes in function 'sanitizer::SizeClassAllocator32<__sanitizer::AP32>::PopulateFreeList' [-Wframe-larger-than=]
1 warning generated.

The frame sizes of the two functions look correct to us. Each function has a large local variable: GetRegistersAndSP has a variable "regs" which is about 432 bytes in size, PopulateFreeList has a variable "shuffle_array" which is about 384 bytes in size. When you consider the default SystemZ frame size of 160 bytes, the stack frame size will exceed the limit of 570 bytes set by the CMakeFile.

This patch adds the same exception as in PowerPC and MIPS.

[uweigand]

LGTM.

[kianm]

I don't have commit access and will not be able to commit this patch. Could someone commit this for me? Thanks.

compiler-rt/trunk/CMakeLists.txt

if (NOT MSVC)
   if(COMPILER_RT_DEBUG)
     list(APPEND SANITIZER_COMMON_CFLAGS -O0)
   else()
     list(APPEND SANITIZER_COMMON_CFLAGS -O3)
   endif()
 endif()
 
 # Determine if we should restrict stack frame sizes.
-# Stack frames on PowerPC and Mips and in debug biuld can be much larger than
+# Stack frames on PowerPC, Mips, SystemZ and in debug build can be much larger than
 # anticipated.
 # FIXME: Fix all sanitizers and add -Wframe-larger-than to
 # SANITIZER_COMMON_FLAGS
 if(COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG AND NOT COMPILER_RT_DEBUG
-   AND NOT ${COMPILER_RT_DEFAULT_TARGET_ARCH} MATCHES "powerpc|mips")
+   AND NOT ${COMPILER_RT_DEFAULT_TARGET_ARCH} MATCHES "powerpc|mips|s390x")
   set(SANITIZER_LIMIT_FRAME_SIZE TRUE)
 else()
   set(SANITIZER_LIMIT_FRAME_SIZE FALSE)
 endif()
 
 if(FUCHSIA OR UNIX)
   set(SANITIZER_USE_SYMBOLS TRUE)
 else()