llvm-project/clang/test/CodeGen/ms-intrinsics.c

// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
// RUN:         -triple i686--windows -Oz -emit-llvm %s -o - \
// RUN:         | FileCheck %s -check-prefix CHECK -check-prefix CHECK-I386
// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
// RUN:         -triple thumbv7--windows -Oz -emit-llvm %s -o - \
// RUN:         | FileCheck %s
// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
// RUN:         -triple x86_64--windows -Oz -emit-llvm %s -o - \
// RUN:         | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-X64

// Intrin.h needs size_t, but -ffreestanding prevents us from getting it from
// stddef.h.  Work around it with this typedef.
typedef __SIZE_TYPE__ size_t;

#include <Intrin.h>

void *test_InterlockedExchangePointer(void * volatile *Target, void *Value) {
  return _InterlockedExchangePointer(Target, Value);
}

// CHECK: define{{.*}}i8* @test_InterlockedExchangePointer(i8** %Target, i8* %Value){{.*}}{
// CHECK:   %[[TARGET:[0-9]+]] = bitcast i8** %Target to [[iPTR:i[0-9]+]]*
// CHECK:   %[[VALUE:[0-9]+]] = ptrtoint i8* %Value to [[iPTR]]
// CHECK:   %[[EXCHANGE:[0-9]+]] = atomicrmw xchg [[iPTR]]* %[[TARGET]], [[iPTR]] %[[VALUE]] seq_cst
// CHECK:   %[[RESULT:[0-9]+]] = inttoptr [[iPTR]] %[[EXCHANGE]] to i8*
// CHECK:   ret i8* %[[RESULT]]
// CHECK: }

void *test_InterlockedCompareExchangePointer(void * volatile *Destination,
                                             void *Exchange, void *Comparand) {
  return _InterlockedCompareExchangePointer(Destination, Exchange, Comparand);
}

// CHECK: define{{.*}}i8* @test_InterlockedCompareExchangePointer(i8** %Destination, i8* %Exchange, i8* %Comparand){{.*}}{
// CHECK:   %[[DEST:[0-9]+]] = bitcast i8** %Destination to [[iPTR]]*
// CHECK:   %[[EXCHANGE:[0-9]+]] = ptrtoint i8* %Exchange to [[iPTR]]
// CHECK:   %[[COMPARAND:[0-9]+]] = ptrtoint i8* %Comparand to [[iPTR]]
// CHECK:   %[[XCHG:[0-9]+]] = cmpxchg volatile [[iPTR]]* %[[DEST:[0-9]+]], [[iPTR]] %[[COMPARAND:[0-9]+]], [[iPTR]] %[[EXCHANGE:[0-9]+]] seq_cst seq_cst
// CHECK:   %[[EXTRACT:[0-9]+]] = extractvalue { [[iPTR]], i1 } %[[XCHG]], 0
// CHECK:   %[[RESULT:[0-9]+]] = inttoptr [[iPTR]] %[[EXTRACT]] to i8*
// CHECK:   ret i8* %[[RESULT:[0-9]+]]
// CHECK: }

long test_InterlockedExchange(long *Target, long Value) {
  return _InterlockedExchange(Target, Value);
}

// CHECK: define{{.*}}i32 @test_InterlockedExchange(i32* %Target, i32 %Value){{.*}}{
// CHECK:   %[[EXCHANGE:[0-9]+]] = atomicrmw xchg i32* %Target, i32 %Value seq_cst
// CHECK:   ret i32 %[[EXCHANGE:[0-9]+]]
// CHECK: }

#if defined(__i386__)
long test__readfsdword(unsigned long Offset) {
  return __readfsdword(Offset);
}

// CHECK-I386: define i32 @test__readfsdword(i32 %Offset){{.*}}{
// CHECK-I386:   [[PTR:%[0-9]+]] = inttoptr i32 %Offset to i32 addrspace(257)*
// CHECK-I386:   [[VALUE:%[0-9]+]] = load volatile i32 addrspace(257)* [[PTR]], align 4
// CHECK-I386:   ret i32 [[VALUE:%[0-9]+]]
// CHECK-I386: }
#endif

#if defined(__x86_64__)
unsigned __int64 test__umulh(unsigned __int64 a, unsigned __int64 b) {
  return __umulh(a, b);
}
// CHECK-X64-LABEL: define i64 @test__umulh(i64 %a, i64 %b)
// CHECK-X64: = mul nuw i128 %

#endif