[PATCH, Fortran, PR 57987] Do not call cgraph_finalize_function multiple times on finalizers

[Dominique Dhumieres]

Hi Martin,

I have applied the patch on top of r201441 and I still get the warning for
gcc/testsuite/gfortran.dg/class_48.f90 with -m32 -O(2|s):

/opt/gcc/work/gcc/testsuite/gfortran.dg/class_48.f90: In function '__final_test2_T.2136.constprop.0':
/opt/gcc/work/gcc/testsuite/gfortran.dg/class_48.f90:39:0: warning: iteration 2147483648 invokes undefined behavior [-Waggressive-loop-optimizations]
     class(t), allocatable :: a
 ^
/opt/gcc/work/gcc/testsuite/gfortran.dg/class_48.f90:39:0: note: containing loop

The test gcc/testsuite/gfortran.dg/pr57987.f90 passes.

Dominique