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re PR middle-end/33199 (tr1/2_general_utilities/shared_ptr/assign/auto_ptr.cc) 

2007-08-30  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/33199
	* tree-ssa-structalias.c (handle_lhs_call): New function.
	(find_func_aliases): In non-IPA mode make sure that for
	calls that return a pointer we add a constraint for the
	result to point to anything.

From-SVN: r127927
This commit is contained in:
Richard Guenther 2007-08-30 14:52:28 +00:00 committed by Richard Biener
parent a5ea943cb8
commit af947da7a7
2 changed files with 34 additions and 1 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2007-08-30 Richard Guenther <rguenther@suse.de>
PR tree-optimization/33199
* tree-ssa-structalias.c (handle_lhs_call): New function.
(find_func_aliases): In non-IPA mode make sure that for
calls that return a pointer we add a constraint for the
result to point to anything.
2007-08-30 Richard Guenther <rguenther@suse.de>
* doc/invoke.texi (-mveclibabi): Document new target option.

27
gcc/tree-ssa-structalias.c
View File

@ -3655,6 +3655,27 @@ handle_rhs_call (tree rhs)
}
}
/* For non-IPA mode, generate constraints necessary for a call
that returns a pointer and assigns it to LHS. This simply makes
the LHS point to anything. */
static void
handle_lhs_call (tree lhs)
{
VEC(ce_s, heap) *lhsc = NULL;
struct constraint_expr rhsc;
unsigned int j;
struct constraint_expr *lhsp;
rhsc.var = anything_id;
rhsc.offset = 0;
rhsc.type = ADDRESSOF;
get_constraint_for (lhs, &lhsc);
for (j = 0; VEC_iterate (ce_s, lhsc, j, lhsp); j++)
process_constraint_1 (new_constraint (*lhsp, rhsc), true);
VEC_free (ce_s, heap, lhsc);
}
/* Walk statement T setting up aliasing constraints according to the
references found in T. This function is the main part of the
constraint builder. AI points to auxiliary alias information used
@ -3726,7 +3747,11 @@ find_func_aliases (tree origt)
if (!in_ipa_mode)
{
if (TREE_CODE (t) == GIMPLE_MODIFY_STMT)
handle_rhs_call (GIMPLE_STMT_OPERAND (t, 1));
{
handle_rhs_call (GIMPLE_STMT_OPERAND (t, 1));
if (POINTER_TYPE_P (TREE_TYPE (GIMPLE_STMT_OPERAND (t, 1))))
handle_lhs_call (GIMPLE_STMT_OPERAND (t, 0));
}
else
handle_rhs_call (t);
}