[flang][cuda] Add missing bind name for __hiloint2double, __double2loint and __double2hiint (#153713)

Author: clementval

flang/module/cudadevice.f90

@@ -654,21 +654,21 @@ attributes(device) real(8) function sinpi(x) bind(c,name='__nv_sinpi')
   end interface
 
   interface __double2loint
-    attributes(device) integer function __double2loint(r) bind(c)
+    attributes(device) integer function __double2loint(r) bind(c, name='__nv_double2loint')
       !dir$ ignore_tkr (d) r
       double precision, value :: r
     end function
   end interface
 
   interface __double2hiint
-    attributes(device) integer function __double2hiint(r) bind(c)
+    attributes(device) integer function __double2hiint(r) bind(c, name='__nv_double2hiint')
       !dir$ ignore_tkr (d) r
       double precision, value :: r
     end function
   end interface
 
   interface __hiloint2double
-    attributes(device) double precision function __hiloint2double(i, j) bind(c)
+    attributes(device) double precision function __hiloint2double(i, j) bind(c, name='__nv_hiloint2double')
       !dir$ ignore_tkr (d) i, (d) j
       integer, value :: i, j
     end function

flang/test/Lower/CUDA/cuda-libdevice.cuf

@@ -244,3 +244,30 @@ end subroutine
 ! CHECK: %{{.*}} = fir.call @__nv_float2uint_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32
 ! CHECK: %{{.*}} = fir.call @__nv_float2uint_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32
 ! CHECK: %{{.*}} = fir.call @__nv_float2uint_rz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32
+
+attributes(global) subroutine test_double2loint()
+  integer :: res
+  double precision :: r
+  res = __double2loint(r)
+end subroutine
+
+! CHECK-LABEL: _QPtest_double2loint
+! CHECK: %{{.*}} = fir.call @__nv_double2loint(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i32
+
+attributes(global) subroutine test_double2hiint()
+  integer :: res
+  double precision :: r
+  res = __double2hiint(r)
+end subroutine
+  
+! CHECK-LABEL: _QPtest_double2hiint
+! CHECK: %{{.*}} = fir.call @__nv_double2hiint(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i32
+
+attributes(global) subroutine test_hiloint2double()
+  double precision :: res
+  integer :: i, j
+  res = __hiloint2double(i, j)
+end subroutine
+
+! CHECK-LABEL: _QPtest_hiloint2double
+! CHECK: %{{.*}} = fir.call @__nv_hiloint2double(%{{.*}}, %{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i32, i32) -> f64