[LoongArch] Define __GCC_HAVE_SYNC_COMPARE_AND_SWAP macros

[brad]

Summary

Define __GCC_HAVE_SYNC_COMPARE_AND_SWAP macros

[MaskRay]

Wait for LoongArch folks:)

[brad]

In D141070#4030069, @MaskRay wrote:

Wait for LoongArch folks:)

Np :)

[SixWeining]

This matches LoongArch gcc's behavior. So LGTM. Thanks.

clang/lib/Basic/Targets/LoongArch.cpp

if (ABI == "lp64d" || ABI == "ilp32d") {
     Builder.defineMacro("__loongarch_hard_float");
     Builder.defineMacro("__loongarch_double_float");
   } else if (ABI == "lp64f" || ABI == "ilp32f") {
     Builder.defineMacro("__loongarch_hard_float");
     Builder.defineMacro("__loongarch_single_float");
   } else if (ABI == "lp64s" || ABI == "ilp32s") {
     Builder.defineMacro("__loongarch_soft_float");
   }
+
+  Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
+  Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
+  Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
+  if (GRLen == 64)
+    Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
 }
 
 static constexpr Builtin::Info BuiltinInfo[] = {
 #define BUILTIN(ID, TYPE, ATTRS)                                               \
   {#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, nullptr},
 #define TARGET_BUILTIN(ID, TYPE, ATTRS, FEATURE)                               \
   {#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, FEATURE},
 #include "clang/Basic/BuiltinsLoongArch.def"

clang/test/Preprocessor/init-loongarch.c

 // LA32: #define __GCC_ATOMIC_CHAR_LOCK_FREE 2
 // LA32: #define __GCC_ATOMIC_INT_LOCK_FREE 2
 // LA32: #define __GCC_ATOMIC_LLONG_LOCK_FREE 1
 // LA32: #define __GCC_ATOMIC_LONG_LOCK_FREE 2
 // LA32: #define __GCC_ATOMIC_POINTER_LOCK_FREE 2
 // LA32: #define __GCC_ATOMIC_SHORT_LOCK_FREE 2
 // LA32: #define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
 // LA32: #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
+// LA32: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
+// LA32: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
+// LA32: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
 // LA32: #define __ILP32__ 1
 // LA32: #define __INT16_C_SUFFIX__
 // LA32: #define __INT16_FMTd__ "hd"
 // LA32: #define __INT16_FMTi__ "hi"
 // LA32: #define __INT16_MAX__ 32767
 // LA32: #define __INT16_TYPE__ short
 // LA32: #define __INT32_C_SUFFIX__
 // LA32: #define __INT32_FMTd__ "d"

 // LA64: #define __GCC_ATOMIC_CHAR_LOCK_FREE 2
 // LA64: #define __GCC_ATOMIC_INT_LOCK_FREE 2
 // LA64: #define __GCC_ATOMIC_LLONG_LOCK_FREE 2
 // LA64: #define __GCC_ATOMIC_LONG_LOCK_FREE 2
 // LA64: #define __GCC_ATOMIC_POINTER_LOCK_FREE 2
 // LA64: #define __GCC_ATOMIC_SHORT_LOCK_FREE 2
 // LA64: #define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
 // LA64: #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
+// LA64: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
+// LA64: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
+// LA64: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
+// LA64: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
 // LA64: #define __INT16_C_SUFFIX__
 // LA64: #define __INT16_FMTd__ "hd"
 // LA64: #define __INT16_FMTi__ "hi"
 // LA64: #define __INT16_MAX__ 32767
 // LA64: #define __INT16_TYPE__ short
 // LA64: #define __INT32_C_SUFFIX__
 // LA64: #define __INT32_FMTd__ "d"
 // LA64: #define __INT32_FMTi__ "i"

clang/test/Preprocessor/predefined-arch-macros.c

 // RUN: %clang -E -dM %s -o - 2>&1 \
 // RUN:     --target=wasm64-unknown-unknown \
 // RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_WASM_ATOMICS
 
 // CHECK_WASM_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
 // CHECK_WASM_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
 // CHECK_WASM_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
 // CHECK_WASM_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
+
+// Begin LoongArch tests ----------------
+
+// RUN: %clang -E -dM %s -o - 2>&1 \
+// RUN:     --target=loongarch32-unknown-linux-gnu \
+// RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_LA32_ATOMICS
+// CHECK_LA32_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
+// CHECK_LA32_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
+// CHECK_LA32_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
+
+// RUN: %clang -E -dM %s -o - 2>&1 \
+// RUN:     --target=loongarch64-unknown-linux-gnu \
+// RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_LA64_ATOMICS
+// CHECK_LA64_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
+// CHECK_LA64_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
+// CHECK_LA64_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
+// CHECK_LA64_ATOMICS: #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1