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tree-ssa-structalias.c (do_structure_copy): Properly handle DEREF.

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2010-04-20  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-structalias.c (do_structure_copy): Properly handle
	DEREF.
	(dump_sa_points_to_info): Remove asserts.
	(init_base_vars): nothing_id isn't an escape point nor does it
	have pointers.

	* gcc.dg/ipa/ipa-pta-14.c: New testcase.

From-SVN: r158553
This commit is contained in:
Richard Guenther 2010-04-20 12:39:45 +00:00 committed by Richard Biener
parent 615c8ffaff
commit b28ae58f12
4 changed files with 60 additions and 8 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2010-04-20 Richard Guenther <rguenther@suse.de>
* tree-ssa-structalias.c (do_structure_copy): Properly handle
DEREF.
(dump_sa_points_to_info): Remove asserts.
(init_base_vars): nothing_id isn't an escape point nor does it
have pointers.
2010-04-20 Jakub Jelinek <jakub@redhat.com>
* tree.h (TYPE_REF_IS_RVALUE): Define.

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2010-04-20 Richard Guenther <rguenther@suse.de>
* gcc.dg/ipa/ipa-pta-14.c: New testcase.
2010-04-20 Jakub Jelinek <jakub@redhat.com>
* g++.dg/debug/dwarf2/rv1.C: New test.

32
gcc/testsuite/gcc.dg/ipa/ipa-pta-14.c Normal file
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@ -0,0 +1,32 @@
/* { dg-do run } */
/* { dg-options "-O2 -fipa-pta -fno-tree-sra -fdump-ipa-pta-details" } */
struct X {
int i;
void *p;
};
static void * __attribute__((noinline,noclone))
foo(struct X *q, void *p)
{
struct X b;
b.p = p;
*q = b;
return q->p;
}
extern void abort (void);
int main()
{
struct X a, c;
void *p;
a.p = (void *)&c;
p = foo(&a, &a);
/* { dg-final { scan-ipa-dump "foo.result = { NULL a c }" "pta" { xfail *-*-* } } } */
/* { dg-final { scan-ipa-dump "foo.result = { NULL a a\[^ \]* c }" "pta" } } */
((struct X *)p)->p = (void *)0;
if (a.p != (void *)0)
abort ();
return 0;
}
/* { dg-final { cleanup-ipa-dump "pta" } } */

24
gcc/tree-ssa-structalias.c
View File

@ -3403,7 +3403,19 @@ do_structure_copy (tree lhsop, tree rhsop)
if (lhsp->type == DEREF
|| (lhsp->type == ADDRESSOF && lhsp->var == anything_id)
|| rhsp->type == DEREF)
process_all_all_constraints (lhsc, rhsc);
{
if (lhsp->type == DEREF)
{
gcc_assert (VEC_length (ce_s, lhsc) == 1);
lhsp->offset = UNKNOWN_OFFSET;
}
if (rhsp->type == DEREF)
{
gcc_assert (VEC_length (ce_s, rhsc) == 1);
rhsp->offset = UNKNOWN_OFFSET;
}
process_all_all_constraints (lhsc, rhsc);
}
else if (lhsp->type == SCALAR
&& (rhsp->type == SCALAR
|| rhsp->type == ADDRESSOF))
@ -5910,13 +5922,7 @@ dump_sa_points_to_info (FILE *outfile)
{
varinfo_t vi = get_varinfo (i);
if (!vi->may_have_pointers)
{
gcc_assert (find (i) == i
|| !(vi = get_varinfo (find (i)))->may_have_pointers);
/* ??? See create_variable_info_for.
gcc_assert (bitmap_empty_p (vi->solution)); */
continue;
}
continue;
dump_solution_for_var (outfile, i);
}
}
@ -5955,6 +5961,8 @@ init_base_vars (void)
var_nothing->size = ~0;
var_nothing->fullsize = ~0;
var_nothing->is_special_var = 1;
var_nothing->may_have_pointers = 0;
var_nothing->is_global_var = 0;
/* Create the ANYTHING variable, used to represent that a variable
points to some unknown piece of memory. */