ComplexLongDoubleUsesFP2Ret = true;
// x86-64 has atomics up to 16 bytes.
- // FIXME: Once the backend is fixed, increase MaxAtomicInlineWidth to 128
- // on CPUs with cmpxchg16b
MaxAtomicPromoteWidth = 128;
- MaxAtomicInlineWidth = 64;
+ MaxAtomicInlineWidth = 128;
}
BuiltinVaListKind getBuiltinVaListKind() const override {
return TargetInfo::X86_64ABIBuiltinVaList;
--- /dev/null
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -target-cpu core2 %s -S -emit-llvm -o - | FileCheck %s
+
+// All atomics up to 16 bytes should be emitted inline on x86_64. The
+// backend can reform __sync_whatever calls if necessary (e.g. the CPU
+// doesn't have cmpxchg16b).
+
+__int128 test_sync_call(__int128 *addr, __int128 val) {
+ // CHECK-LABEL: @test_sync_call
+ // CHECK: atomicrmw add i128
+ return __sync_fetch_and_add(addr, val);
+}
+
+__int128 test_c11_call(_Atomic __int128 *addr, __int128 val) {
+ // CHECK-LABEL: @test_c11_call
+ // CHECK: atomicrmw sub
+ return __c11_atomic_fetch_sub(addr, val, 0);
+}
+
+__int128 test_atomic_call(__int128 *addr, __int128 val) {
+ // CHECK-LABEL: @test_atomic_call
+ // CHECK: atomicrmw or
+ return __atomic_fetch_or(addr, val, 0);
+}
+
+__int128 test_expression(_Atomic __int128 *addr) {
+ // CHECK-LABEL: @test_expression
+ // CHECK: atomicrmw and
+ *addr &= 1;
+}