[flang][cuda] Add bind name for __ll2double_rX interfaces

Author: clementval

flang/module/cudadevice.f90

@@ -625,29 +625,29 @@ attributes(device) real(8) function sinpi(x) bind(c,name='__nv_sinpi')
     end function
   end interface
 
-  interface __ll2double_rn
-    attributes(device) double precision function __ll2double_rn(i) bind(c)
+  interface __ll2double_rd
+    attributes(device) double precision function __ll2double_rd(i) bind(c, name='__nv_ll2double_rd')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
   end interface
 
-  interface __ll2double_rz
-    attributes(device) double precision function __ll2double_rz(i) bind(c)
+  interface __ll2double_rn
+    attributes(device) double precision function __ll2double_rn(i) bind(c, name='__nv_ll2double_rn')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
   end interface
 
   interface __ll2double_ru
-    attributes(device) double precision function __ll2double_ru(i) bind(c)
+    attributes(device) double precision function __ll2double_ru(i) bind(c, name='__nv_ll2double_ru')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
   end interface
 
-  interface __ll2double_rd
-    attributes(device) double precision function __ll2double_rd(i) bind(c)
+  interface __ll2double_rz
+    attributes(device) double precision function __ll2double_rz(i) bind(c, name='__nv_ll2double_rz')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function

flang/test/Lower/CUDA/cuda-device-proc.cuf

@@ -77,6 +77,10 @@ attributes(global) subroutine devsub()
   ai = __mul24(ai, ai)
   ai = __umul24(ai, ai)
   af = __powf(af, af)
+  ad = __ll2double_rd(al)
+  ad = __ll2double_rn(al)
+  ad = __ll2double_ru(al)
+  ad = __ll2double_rz(al)
 end
 
 ! CHECK-LABEL: func.func @_QPdevsub() attributes {cuf.proc_attr = #cuf.cuda_proc<global>}