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tree-ssa-structalias.c (push_fields_onto_fieldstack): Avoid pushing again if current struct contains only fields we decomposed. 

2005-07-27  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-structalias.c (push_fields_onto_fieldstack):
	Avoid pushing again if current struct contains only
	fields we decomposed.

	* gcc.dg/tree-ssa/salias-1.c: New testcase.

From-SVN: r102424
This commit is contained in:
Richard Guenther 2005-07-27 11:15:32 +00:00 committed by Richard Biener
parent 093c232927
commit c11b02311a
4 changed files with 33 additions and 1 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2005-07-27 Richard Guenther <rguenther@suse.de>
* tree-ssa-structalias.c (push_fields_onto_fieldstack):
Avoid pushing again if current struct contains only
fields we decomposed.
2005-07-27 Jan Hubicka <jh@suse.cz>
PR tree-optimization/22574

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2005-07-27 Richard Guenther <rguenther@suse.de>
* gcc.dg/tree-ssa/salias-1.c: New testcase.
2005-07-27 Volker Reichelt <reichelt@igpm.rwth-aachen.de>
PR fortran/22503

19
gcc/testsuite/gcc.dg/tree-ssa/salias-1.c Normal file
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@ -0,0 +1,19 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-salias" } */
struct {
struct {
struct {
int i, j;
} c;
} b;
} a;
int foo(void)
{
a.b.c.i = 0;
return a.b.c.j;
}
/* { dg-final { scan-tree-dump-times "SFT" 2 "salias" } } */
/* { dg-final { cleanup-tree-dump "salias" } } */

5
gcc/tree-ssa-structalias.c
View File

@ -2972,6 +2972,7 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack,
if (TREE_CODE (field) == FIELD_DECL)
{
bool push = false;
int pushed = 0;
if (has_union
&& (TREE_CODE (TREE_TYPE (field)) == QUAL_UNION_TYPE
@ -2980,7 +2981,7 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack,
if (!var_can_have_subvars (field))
push = true;
else if (!(push_fields_onto_fieldstack
else if (!(pushed = push_fields_onto_fieldstack
(TREE_TYPE (field), fieldstack,
offset + bitpos_of_field (field), has_union))
&& DECL_SIZE (field)
@ -2999,6 +3000,8 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack,
pair->offset = offset + bitpos_of_field (field);
count++;
}
else
count += pushed;
}
return count;