[gcc r12-6957] [libgomp, testsuite] Reduce recursion depth in declare_target-*.f90

[gcc r12-6957] [libgomp, testsuite] Reduce recursion depth in declare_target-*.f90

[Tom de Vries]

https://gcc.gnu.org/g:be362d5e127e087dcd4a2c0d843cf7b9a7399c73

commit r12-6957-gbe362d5e127e087dcd4a2c0d843cf7b9a7399c73
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Jan 20 13:37:08 2022 +0100

    [libgomp, testsuite] Reduce recursion depth in declare_target-*.f90
    
    When running the libgomp testsuite with GOMP_NVPTX_JIT=-O0 using an nvptx
    accelerator (Nvidia T400, 2GB), I run into:
    ...
    libgomp: cuCtxSynchronize error: unspecified launch failure \
      (perhaps abort was called)
    
    libgomp: cuMemFree_v2 error: unspecified launch failure
    
    libgomp: device finalization failed
    FAIL: libgomp.fortran/examples-4/declare_target-1.f90   -O0  execution test
    ...
    
    The test-case contains:
    ...
      ! Reduced from 25 to 23, otherwise execution runs out of thread stack on
      ! Nvidia Titan V.
      if (fib (23) /= fib_wrapper (23)) stop 2
    ...
    
    Fix this by reducing the fib/fib_wrapper argument from 23 to 22.
    
    Same for declare_target-2.f90.
    
    Tested on x86_64 with nvptx accelerator.
    
    libgomp/ChangeLog:
    
    2022-01-27  Tom de Vries  <tdevries@suse.de>
    
            * testsuite/libgomp.fortran/examples-4/declare_target-1.f90: Reduce
            recursion depth.
            * testsuite/libgomp.fortran/examples-4/declare_target-2.f90: Same.

Diff:
---
 libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90 | 4 +++-
 libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90 | 6 ++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90 b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90
index e439fe1b738..b761979ecde 100644
--- a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90
+++ b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90
@@ -29,5 +29,7 @@ program e_53_1
   if (fib (15) /= fib_wrapper (15)) stop 1
   ! Reduced from 25 to 23, otherwise execution runs out of thread stack on
   ! Nvidia Titan V.
-  if (fib (23) /= fib_wrapper (23)) stop 2
+  ! Reduced from 23 to 22, otherwise execution runs out of thread stack on
+  ! Nvidia T400 (2GB variant), when run with GOMP_NVPTX_JIT=-O0.
+  if (fib (22) /= fib_wrapper (22)) stop 2
 end program
diff --git a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90 b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90
index ee582b21632..f576c25ba39 100644
--- a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90
+++ b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90
@@ -6,9 +6,11 @@ program e_53_2
   !$omp target map(from: x)
     ! Reduced from 25 to 23, otherwise execution runs out of thread stack on
     ! Nvidia Titan V.
-    x = fib (23)
+    ! Reduced from 23 to 22, otherwise execution runs out of thread stack on
+    ! Nvidia T400 (2GB variant), when run with GOMP_NVPTX_JIT=-O0.
+    x = fib (22)
   !$omp end target
-  if (x /= fib (23)) stop 1
+  if (x /= fib (22)) stop 1
 end program
 
 integer recursive function fib (n) result (f)