From bad3df476457db2fd7dd36729c47fb1d2bddad3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Valentin=20Clement=20=28=E3=83=90=E3=83=AC=E3=83=B3?=
 =?UTF-8?q?=E3=82=BF=E3=82=A4=E3=83=B3=20=E3=82=AF=E3=83=AC=E3=83=A1?=
 =?UTF-8?q?=E3=83=B3=29?= <clementval@gmail.com>
Date: Thu, 14 Aug 2025 13:34:25 -0700
Subject: [PATCH] [flang][cuda] Add bind names for __double2ll_rX interfaces
 (#153660)

---
 flang/module/cudadevice.f90              | 14 +++++++-------
 flang/test/Lower/CUDA/cuda-libdevice.cuf | 15 +++++++++++++++
 2 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/flang/module/cudadevice.f90 b/flang/module/cudadevice.f90
index 432125097e9d..1e403b1ffdb9 100644
--- a/flang/module/cudadevice.f90
+++ b/flang/module/cudadevice.f90
@@ -625,29 +625,29 @@ implicit none
     end function
   end interface
 
-  interface __double2ll_rn
-    attributes(device) integer(8) function __double2ll_rn(r) bind(c)
+  interface __double2ll_rd
+    attributes(device) integer(8) function __double2ll_rd(r) bind(c, name='__nv_double2ll_rd')
       !dir$ ignore_tkr (d) r
       double precision, value :: r
     end function
   end interface
 
-  interface __double2ll_rz
-    attributes(device) integer(8) function __double2ll_rz(r) bind(c)
+  interface __double2ll_rn
+    attributes(device) integer(8) function __double2ll_rn(r) bind(c, name='__nv_double2ll_rn')
       !dir$ ignore_tkr (d) r
       double precision, value :: r
     end function
   end interface
 
   interface __double2ll_ru
-    attributes(device) integer(8) function __double2ll_ru(r) bind(c)
+    attributes(device) integer(8) function __double2ll_ru(r) bind(c, name='__nv_double2ll_ru')
       !dir$ ignore_tkr (d) r
       double precision, value :: r
     end function
   end interface
 
-  interface __double2ll_rd
-    attributes(device) integer(8) function __double2ll_rd(r) bind(c)
+  interface __double2ll_rz
+    attributes(device) integer(8) function __double2ll_rz(r) bind(c, name='__nv_double2ll_rz')
       !dir$ ignore_tkr (d) r
       double precision, value :: r
     end function
diff --git a/flang/test/Lower/CUDA/cuda-libdevice.cuf b/flang/test/Lower/CUDA/cuda-libdevice.cuf
index 6b80fb2e7414..844bdb954924 100644
--- a/flang/test/Lower/CUDA/cuda-libdevice.cuf
+++ b/flang/test/Lower/CUDA/cuda-libdevice.cuf
@@ -100,3 +100,18 @@ end subroutine
 ! CHECK-LABEL: _QPtest_exp
 ! CHECK: %{{.*}} = fir.call @__nv_expf(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> f32
 ! CHECK: %{{.*}} = fir.call @__nv_exp10f(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> f32
+
+attributes(global) subroutine test_double2ll_rX()
+  integer(8) :: res
+  double precision :: r
+  res = __double2ll_rd(r)
+  res = __double2ll_rn(r)
+  res = __double2ll_ru(r)
+  res = __double2ll_rz(r)
+end subroutine
+
+! CHECK-LABEL: _QPtest_double2ll_rx
+! CHECK: %{{.*}} = fir.call @__nv_double2ll_rd(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64
+! CHECK: %{{.*}} = fir.call @__nv_double2ll_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64
+! CHECK: %{{.*}} = fir.call @__nv_double2ll_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64
+! CHECK: %{{.*}} = fir.call @__nv_double2ll_rz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64