Enable compiler-rt on SPARC

[ro]

Summary

This patch enables compiler-rt on SPARC targets. Most of the changes are straightforward:

• Add 32 and 64-bit sparc to compiler-rt

• lib/builtins/fp_lib.h needed to check if the int128_t and uint128_t types exist (which they don't on sparc)

There's one issue of note: many asan tests fail to compile on Solaris/SPARC:

fatal error: error in backend: Function "_ZN7testing8internal16BoolFromGTestEnvEPKcb": over-aligned dynamic alloca not supported.

Therefore, while asan is still built, both asan and ubsan-with-asan, is disabled. The
goal is to check if asan keeps compiling on Solaris/SPARC. This serves asan in gcc,
which doesn't have the problem above and works just fine.

With this patch, sparcv9-sun-solaris2.11 test results are pretty good:

Failing Tests (9):
    Builtins-sparc-sunos :: divtc3_test.c
    Builtins-sparcv9-sunos :: compiler_rt_logbl_test.c
    Builtins-sparcv9-sunos :: divtc3_test.c
[...]
    UBSan-Standalone-sparc :: TestCases/TypeCheck/misaligned.cpp
    UBSan-Standalone-sparcv9 :: TestCases/TypeCheck/misaligned.cpp

The builtin failures are due to Bugs 42493 and 42496. The tree contained a few additonal
patches either currently in review or about to be sumitted.

Tested on sparcv9-sun-solaris2.11. Ok for trunk?

[ro]

Refreshed.

[ro]

This slightly revised patch completely disabled asan testing since that would break the
build as described. It does build it to make sure that it keeps compiling for use in GCC
where it works just fine.

Apart from that, it includes GENERIC_TF_SOURCES in sparc*_SOURCES to avoid
a couple of builtin test link failures.

Also, on top of https://reviews.llvm.org/D63982, it disables SPARC ubsan-with-asan
testing.

This patch allows reasonable sparcv9-sun-solaris2.11 results. Ok for trunk?

[ro]

Updated title and summary to reflect current status: ready to be reviewed.

[eugenis]

LGTM

cmake/Modules/CompilerRTUtils.cmake

macro(detect_target_arch)
   check_symbol_exists(__x86_64__ "" __X86_64)
   check_symbol_exists(__i386__ "" __I386)
   check_symbol_exists(__mips__ "" __MIPS)
   check_symbol_exists(__mips64__ "" __MIPS64)
   check_symbol_exists(__powerpc64__ "" __PPC64)
   check_symbol_exists(__powerpc64le__ "" __PPC64LE)
   check_symbol_exists(__riscv "" __RISCV)
   check_symbol_exists(__s390x__ "" __S390X)
+  check_symbol_exists(__sparc "" __SPARC)
+  check_symbol_exists(__sparcv9 "" __SPARCV9)
   check_symbol_exists(__wasm32__ "" __WEBASSEMBLY32)
   check_symbol_exists(__wasm64__ "" __WEBASSEMBLY64)
   if(__ARM)
     add_default_target_arch(arm)
   elseif(__AARCH64)
     add_default_target_arch(aarch64)
   elseif(__X86_64)
     add_default_target_arch(x86_64)
if(CMAKE_SIZEOF_VOID_P EQUAL "4")
       add_default_target_arch(riscv32)
     elseif(CMAKE_SIZEOF_VOID_P EQUAL "8")
       add_default_target_arch(riscv64)
     else()
       message(FATAL_ERROR "Unsupport XLEN for RISC-V")
     endif()
   elseif(__S390X)
     add_default_target_arch(s390x)
+  elseif(__SPARCV9)
+    add_default_target_arch(sparcv9)
+  elseif(__SPARC)
+    add_default_target_arch(sparc)
   elseif(__WEBASSEMBLY32)
     add_default_target_arch(wasm32)
   elseif(__WEBASSEMBLY64)
     add_default_target_arch(wasm64)
   endif()
 endmacro()
 
 macro(load_llvm_config)

cmake/base-config-ix.cmake

elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc")
 
       if(HOST_IS_BIG_ENDIAN)
         test_target_arch(powerpc64 "" "-m64")
       else()
         test_target_arch(powerpc64le "" "-m64")
       endif()
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "s390x")
       test_target_arch(s390x "" "")
+    elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "sparc")
+      test_target_arch(sparc "" "-m32")
+      test_target_arch(sparcv9 "" "-m64")
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "mipsel|mips64el")
       # Gcc doesn't accept -m32/-m64 so we do the next best thing and use
       # -mips32r2/-mips64r2. We don't use -mips1/-mips3 because we want to match
       # clang's default CPU's. In the 64-bit case, we must also specify the ABI
       # since the default ABI differs between gcc and clang.
       # FIXME: Ideally, we would build the N32 library too.
       test_target_arch(mipsel "" "-mips32r2" "-mabi=32")
       test_target_arch(mips64el "" "-mips64r2" "-mabi=64")

cmake/builtin-config-ix.cmake

 set(HEXAGON hexagon)
 set(X86 i386)
 set(X86_64 x86_64)
 set(MIPS32 mips mipsel)
 set(MIPS64 mips64 mips64el)
 set(PPC64 powerpc64 powerpc64le)
 set(RISCV32 riscv32)
 set(RISCV64 riscv64)
+set(SPARC sparc)
+set(SPARCV9 sparcv9)
 set(WASM32 wasm32)
 set(WASM64 wasm64)
 
 if(APPLE)
   set(ARM64 arm64)
   set(ARM32 armv7 armv7k armv7s)
   set(X86_64 x86_64 x86_64h)
 endif()
 
 set(ALL_BUILTIN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64}
-    ${HEXAGON} ${MIPS32} ${MIPS64} ${PPC64} ${RISCV32} ${RISCV64} ${WASM32} ${WASM64})
+    ${HEXAGON} ${MIPS32} ${MIPS64} ${PPC64} ${RISCV32} ${RISCV64} ${SPARC} ${SPARCV9} ${WASM32} ${WASM64})
 
 include(CompilerRTUtils)
 include(CompilerRTDarwinUtils)
 
 if(APPLE)
 
   find_darwin_sdk_dir(DARWIN_osx_SYSROOT macosx)
   find_darwin_sdk_dir(DARWIN_iossim_SYSROOT iphonesimulator)

cmake/config-ix.cmake

 set(X86 i386)
 set(X86_64 x86_64)
 set(MIPS32 mips mipsel)
 set(MIPS64 mips64 mips64el)
 set(PPC64 powerpc64 powerpc64le)
 set(RISCV32 riscv32)
 set(RISCV64 riscv64)
 set(S390X s390x)
+set(SPARC sparc)
+set(SPARCV9 sparcv9)
 set(WASM32 wasm32)
 set(WASM64 wasm64)
 
 if(APPLE)
   set(ARM64 arm64)
   set(ARM32 armv7 armv7s armv7k)
   set(X86_64 x86_64 x86_64h)
 endif()
 
 set(ALL_SANITIZER_COMMON_SUPPORTED_ARCH ${X86} ${X86_64} ${PPC64}
-    ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} ${S390X})
+    ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} ${S390X} ${SPARC} ${SPARCV9})
 set(ALL_ASAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64}
-    ${MIPS32} ${MIPS64} ${PPC64} ${S390X})
+    ${MIPS32} ${MIPS64} ${PPC64} ${S390X} ${SPARC} ${SPARCV9})
 set(ALL_DFSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64})
 set(ALL_FUZZER_SUPPORTED_ARCH ${X86_64} ${ARM64})
 
 if(APPLE)
   set(ALL_LSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${MIPS64} ${ARM64})
 else()
   set(ALL_LSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${MIPS64} ${ARM64} ${ARM32} ${PPC64})
 endif()
 set(ALL_MSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64} ${PPC64})
 set(ALL_HWASAN_SUPPORTED_ARCH ${X86_64} ${ARM64})
 set(ALL_PROFILE_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${PPC64}
-    ${MIPS32} ${MIPS64} ${S390X})
+    ${MIPS32} ${MIPS64} ${S390X} ${SPARC} ${SPARCV9})
 set(ALL_TSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64} ${PPC64})
 set(ALL_UBSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64}
-    ${MIPS32} ${MIPS64} ${PPC64} ${S390X})
+    ${MIPS32} ${MIPS64} ${PPC64} ${S390X} ${SPARC} ${SPARCV9})
 set(ALL_SAFESTACK_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM64} ${MIPS32} ${MIPS64})
 set(ALL_CFI_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${MIPS64})
 set(ALL_ESAN_SUPPORTED_ARCH ${X86_64} ${MIPS64})
 set(ALL_SCUDO_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} ${PPC64})
 if(APPLE)
 set(ALL_XRAY_SUPPORTED_ARCH ${X86_64})
 else()
 set(ALL_XRAY_SUPPORTED_ARCH ${X86_64} ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} powerpc64le)

lib/asan/tests/CMakeLists.txt

 endfunction()
 
 if(COMPILER_RT_CAN_EXECUTE_TESTS AND NOT ANDROID)
   set(ASAN_TEST_ARCH ${ASAN_SUPPORTED_ARCH})
   if(APPLE)
     darwin_filter_host_archs(ASAN_SUPPORTED_ARCH ASAN_TEST_ARCH)
   endif()
   if(OS_NAME MATCHES "SunOS")
+    list(REMOVE_ITEM ASAN_TEST_ARCH sparc sparcv9)
     list(REMOVE_ITEM ASAN_TEST_ARCH x86_64)
   endif()
 
   foreach(arch ${ASAN_TEST_ARCH})
 
     # Add static ASan runtime that will be linked with uninstrumented tests.
     set(ASAN_TEST_RUNTIME RTAsanTest.${arch})
     if(APPLE)

lib/builtins/CMakeLists.txt

 set(powerpc64le_SOURCES ${powerpc64_SOURCES})
 
 set(riscv_SOURCES ${GENERIC_SOURCES} ${GENERIC_TF_SOURCES})
 set(riscv32_SOURCES
   riscv/mulsi3.S
   ${riscv_SOURCES})
 set(riscv64_SOURCES ${riscv_SOURCES})
 
+set(sparc_SOURCES ${GENERIC_SOURCES})
+set(sparcv9_SOURCES ${GENERIC_SOURCES})
+
 set(wasm32_SOURCES
   ${GENERIC_TF_SOURCES}
   ${GENERIC_SOURCES})
 set(wasm64_SOURCES
   ${GENERIC_TF_SOURCES}
   ${GENERIC_SOURCES})
 
 add_custom_target(builtins)

lib/builtins/fp_lib.h

static __inline void wideMultiply(rep_t a, rep_t b, rep_t *hi, rep_t *lo) {
     *hi = hiWord(plohi) + hiWord(philo) + hiWord(r1) + phihi;
 }
 #undef loWord
 #undef hiWord
 
 COMPILER_RT_ABI fp_t __adddf3(fp_t a, fp_t b);
 
 #elif defined QUAD_PRECISION
-#if __LDBL_MANT_DIG__ == 113
+#if __LDBL_MANT_DIG__ == 113 && defined(__SIZEOF_INT128__)
 #define CRT_LDBL_128BIT
 typedef __uint128_t rep_t;
 typedef __int128_t srep_t;
 typedef long double fp_t;
 #define REP_C (__uint128_t)
 // Note: Since there is no explicit way to tell compiler the constant is a
 // 128-bit integer, we let the constant be casted to 128-bit integer
 #define significandBits 112

 }
 #undef Word_1
 #undef Word_2
 #undef Word_3
 #undef Word_4
 #undef Word_HiMask
 #undef Word_LoMask
 #undef Word_FullMask
-#endif // __LDBL_MANT_DIG__ == 113
+#endif // __LDBL_MANT_DIG__ == 113 && __SIZEOF_INT128__
 #else
 #error SINGLE_PRECISION, DOUBLE_PRECISION or QUAD_PRECISION must be defined.
 #endif
 
 #if defined(SINGLE_PRECISION) || defined(DOUBLE_PRECISION) || defined(CRT_LDBL_128BIT)
 #define typeWidth       (sizeof(rep_t)*CHAR_BIT)
 #define exponentBits    (typeWidth - significandBits - 1)
 #define maxExponent     ((1 << exponentBits) - 1)

test/asan/CMakeLists.txt

if(OS_NAME MATCHES "Windows" AND CMAKE_SIZEOF_VOID_P EQUAL 8 AND
   message(WARNING "Disabling ASan tests because they are unreliable on Windows 7 and earlier")
 endif()
 
 if (SHADOW_MAPPING_UNRELIABLE)
   set(EXCLUDE_FROM_ALL TRUE)
 endif()
 
 macro(get_bits_for_arch arch bits)
-  if (${arch} MATCHES "x86_64|powerpc64|powerpc64le|aarch64|arm64|mips64|mips64el|s390x")
+  if (${arch} MATCHES "x86_64|powerpc64|powerpc64le|aarch64|arm64|mips64|mips64el|s390x|sparcv9")
     set(${bits} 64)
-  elseif (${arch} MATCHES "i386|arm|mips|mipsel")
+  elseif (${arch} MATCHES "i386|arm|mips|mipsel|sparc")
     set(${bits} 32)
   else()
     message(FATAL_ERROR "Unknown target architecture: ${arch}")
   endif()
 endmacro()
 
 set(ASAN_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
 if(NOT COMPILER_RT_STANDALONE_BUILD)
   list(APPEND ASAN_TEST_DEPS asan)
   if(NOT APPLE AND COMPILER_RT_HAS_LLD)
     list(APPEND ASAN_TEST_DEPS lld)
   endif()
 endif()
 set(ASAN_DYNAMIC_TEST_DEPS ${ASAN_TEST_DEPS})
 
 set(ASAN_TEST_ARCH ${ASAN_SUPPORTED_ARCH})
 if(APPLE)
   darwin_filter_host_archs(ASAN_SUPPORTED_ARCH ASAN_TEST_ARCH)
 endif()
 if(OS_NAME MATCHES "SunOS")
+  list(REMOVE_ITEM ASAN_TEST_ARCH sparc sparcv9)
   list(REMOVE_ITEM ASAN_TEST_ARCH x86_64)
 endif()
 
 foreach(arch ${ASAN_TEST_ARCH})
   if(ANDROID)
     set(ASAN_TEST_TARGET_ARCH ${arch}-android)
   else()
     set(ASAN_TEST_TARGET_ARCH ${arch})

test/ubsan/CMakeLists.txt

macro(add_ubsan_testsuites test_mode sanitizer arch)
   endif()
 endmacro()
 
 set(UBSAN_TEST_ARCH ${UBSAN_SUPPORTED_ARCH})
 if(APPLE)
   darwin_filter_host_archs(UBSAN_SUPPORTED_ARCH UBSAN_TEST_ARCH)
 endif()
 if(OS_NAME MATCHES "SunOS")
+  list(REMOVE_ITEM UBSAN_TEST_ARCH sparcv9)
   list(REMOVE_ITEM UBSAN_TEST_ARCH x86_64)
 endif()
 
 foreach(arch ${UBSAN_TEST_ARCH})
   set(UBSAN_TEST_TARGET_ARCH ${arch})
   get_test_cc_for_arch(${arch} UBSAN_TEST_TARGET_CC UBSAN_TEST_TARGET_CFLAGS)
   add_ubsan_testsuites("Standalone" ubsan ${arch})
 

test/ubsan_minimal/CMakeLists.txt

 set(UBSAN_LIT_TESTS_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 set(UBSAN_TEST_ARCH ${UBSAN_SUPPORTED_ARCH})
 if(APPLE)
   darwin_filter_host_archs(UBSAN_SUPPORTED_ARCH UBSAN_TEST_ARCH)
 endif()
 if(OS_NAME MATCHES "SunOS")
+  list(REMOVE_ITEM UBSAN_TEST_ARCH sparcv9)
   list(REMOVE_ITEM UBSAN_TEST_ARCH x86_64)
 endif()
 
 set(UBSAN_TESTSUITES)
 set(UBSAN_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
 if(NOT COMPILER_RT_STANDALONE_BUILD)
   list(APPEND UBSAN_TEST_DEPS ubsan-minimal)
 endif()