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Fortran - (large) arrays in the main shall be static

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gcc/fortran/ChangeLog:

	PR fortran/102366
	* trans-decl.c (gfc_finish_var_decl): Disable the warning message
	for variables moved from stack to static storange if they are
	declared in the main, but allow the move to happen.

gcc/testsuite/ChangeLog:

	PR fortran/102366
	* gfortran.dg/pr102366.f90: New test.
This commit is contained in:
Harald Anlauf 2021-09-17 21:45:33 +02:00
parent 42eff613d0
commit 51166eb2c5
2 changed files with 12 additions and 2 deletions
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5
gcc/fortran/trans-decl.c
View File

@ -743,7 +743,6 @@ gfc_finish_var_decl (tree decl, gfc_symbol * sym)
/* Keep variables larger than max-stack-var-size off stack. */
if (!(sym->ns->proc_name && sym->ns->proc_name->attr.recursive)
&& !(sym->ns->proc_name && sym->ns->proc_name->attr.is_main_program)
&& !sym->attr.automatic
&& sym->attr.save != SAVE_EXPLICIT
&& sym->attr.save != SAVE_IMPLICIT
@ -757,7 +756,9 @@ gfc_finish_var_decl (tree decl, gfc_symbol * sym)
|| sym->attr.allocatable)
&& !DECL_ARTIFICIAL (decl))
{
if (flag_max_stack_var_size > 0)
if (flag_max_stack_var_size > 0
&& !(sym->ns->proc_name
&& sym->ns->proc_name->attr.is_main_program))
gfc_warning (OPT_Wsurprising,
"Array %qs at %L is larger than limit set by "
"%<-fmax-stack-var-size=%>, moved from stack to static "

9
gcc/testsuite/gfortran.dg/pr102366.f90 Normal file
View File

@ -0,0 +1,9 @@
! { dg-do compile }
! { dg-options "-fdump-tree-original -Wall" }
! { dg-final { scan-tree-dump-times "static real" 1 "original" } }
! PR fortran/102366 - large arrays no longer become static
program p
real(kind=4) :: a(16776325)
a=1.0
end