! REQUIRES: flang-supports-f128-math
! RUN: %flang_fc1 -emit-fir %s -o - | FileCheck %s --check-prefixes="CHECK"

function test_real4(x)
  real :: x, test_real4
  test_real4 = acosd(x)
end function

! CHECK-LABEL: @_QPtest_real4
! CHECK: %[[factor:.*]] = arith.constant 57.2957763 : f32
! CHECK: %[[result:.*]] = math.acos %{{.*}} fastmath<contract> : f32
! CHECK: %[[arg:.*]] = arith.mulf %[[result]], %[[factor]] fastmath<contract> : f32

function test_real8(x)
  real(8) :: x, test_real8
  test_real8 = acosd(x)
end function

! CHECK-LABEL: @_QPtest_real8
! CHECK: %[[factor:.*]] = arith.constant 57.295779513082323 : f64
! CHECK: %[[result:.*]] = math.acos %{{.*}} fastmath<contract> : f64
! CHECK: %[[arg:.*]] = arith.mulf %[[result]], %[[factor]] fastmath<contract> : f64

function test_real16(x)
  real(16) :: x, test_real16
  test_real16 = acosd(x)
end function

! CHECK-LABEL: @_QPtest_real16
! CHECK: %[[factor:.*]] = arith.constant 57.295779513082320876798154814105{{.*}} : f128
! CHECK: %[[result:.*]] = fir.call @_FortranAAcosF128({{.*}}) fastmath<contract> : (f128) -> f128
! CHECK: %[[arg:.*]] = arith.mulf %[[result]], %[[factor]] fastmath<contract> : f128