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tree-ssa-structalias.c (create_variable_info_for): Do not create fields for heap vars or vars with a noalias state.

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2008-08-29  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-structalias.c (create_variable_info_for): Do not
	create fields for heap vars or vars with a noalias state.
	For NO_ALIAS_ANYTHING variables add a self-constraint, not one
	from ESCAPED.

        * gfortran.fortran-torture/compile/20080806-1.f90: New testcase.

From-SVN: r139765
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Richard Guenther 2008-08-29 11:47:01 +00:00 • committed by Richard Biener
parent dce2b2f6cb
commit 13c6bff447
4 changed files with 47 additions and 2 deletions
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7
gcc/ChangeLog
View file

@ -1,3 +1,10 @@
2008-08-29 Richard Guenther <rguenther@suse.de>
* tree-ssa-structalias.c (create_variable_info_for): Do not
create fields for heap vars or vars with a noalias state.
For NO_ALIAS_ANYTHING variables add a self-constraint, not one
from ESCAPED.
2008-08-29 Richard Guenther <rguenther@suse.de>
* common.opt (ftree-store-ccp): Mark as preserved for

4
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,7 @@
2008-08-29 Richard Guenther <rguenther@suse.de>
* gfortran.fortran-torture/compile/20080805-1.f90: New testcase.
2008-08-29 Richard Guenther <rguenther@suse.de>
PR middle-end/37236

24
gcc/testsuite/gfortran.fortran-torture/compile/20080806-1.f90 Normal file
View file

@ -0,0 +1,24 @@
MODULE M1
IMPLICIT NONE
TYPE mmm
COMPLEX(KIND=8), DIMENSION(:,:), POINTER :: data
END TYPE mmm
CONTAINS
SUBROUTINE S(ma,mb,mc)
TYPE(mmm), POINTER :: ma,mb,mc
COMPLEX(KIND=8), DIMENSION(:, :), &
POINTER :: a, b, c
INTEGER :: i,j
a=>ma%data
b=>mb%data
c=>mc%data
DO i=1,size(a,1)
DO j=1,size(a,2)
c(i,j)=a(i,j)*b(i,j)
ENDDO
ENDDO
END SUBROUTINE
END MODULE M1

14
gcc/tree-ssa-structalias.c
View file

@ -4354,7 +4354,11 @@ create_variable_info_for (tree decl, const char *name)
if (TREE_CODE (decl) == FUNCTION_DECL && in_ipa_mode)
return create_function_info_for (decl, name);
if (var_can_have_subvars (decl) && use_field_sensitive)
if (var_can_have_subvars (decl) && use_field_sensitive
&& (!var_ann (decl)
|| var_ann (decl)->noalias_state == 0)
&& (!var_ann (decl)
|| !var_ann (decl)->is_heapvar))
push_fields_onto_fieldstack (decl_type, &fieldstack, 0);
/* If the variable doesn't have subvars, we may end up needing to
@ -4380,7 +4384,13 @@ create_variable_info_for (tree decl, const char *name)
VEC_safe_push (varinfo_t, heap, varmap, vi);
if (is_global && (!flag_whole_program || !in_ipa_mode)
&& could_have_pointers (decl))
make_constraint_from (vi, escaped_id);
{
if (var_ann (decl)
&& var_ann (decl)->noalias_state == NO_ALIAS_ANYTHING)
make_constraint_from (vi, vi->id);
else
make_constraint_from (vi, escaped_id);
}
stats.total_vars++;
if (use_field_sensitive