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tree-ssa-structalias.c (merge_smts_into): Remove.

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2008-06-06  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-structalias.c (merge_smts_into): Remove.
	(find_what_p_points_to): Do not bother to compute the
	points-to set for pt_anything pointers.
	* tree-ssa-operands.c (get_addr_dereference_operands): No NMT
	for pt_anything pointers is ok.

	* gcc.dg/tree-ssa/alias-18.c: XFAIL some sub-tests.

From-SVN: r136428
This commit is contained in:
Richard Guenther 2008-06-06 10:11:44 +00:00 committed by Richard Biener
parent 9fbe48c0a4
commit 9f09b13fd4
5 changed files with 24 additions and 38 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2008-06-06 Richard Guenther <rguenther@suse.de>
* tree-ssa-structalias.c (merge_smts_into): Remove.
(find_what_p_points_to): Do not bother to compute the
points-to set for pt_anything pointers.
* tree-ssa-operands.c (get_addr_dereference_operands): No NMT
for pt_anything pointers is ok.
2008-06-06 Jan Hubicka <jh@suse.cz>
* passes.c (execute_ipa_pass_list): Do not regenerate summaries.

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2008-06-06 Richard Guenther <rguenther@suse.de>
* gcc.dg/tree-ssa/alias-18.c: XFAIL some sub-tests.
2008-06-04 Joseph Myers <joseph@codesourcery.com>
* lib/target-supports.exp (check_effective_target_powerpc_spu):

4
gcc/testsuite/gcc.dg/tree-ssa/alias-18.c
View File

@ -78,10 +78,10 @@ int test8 (struct A *p, int *q)
/* { dg-final { scan-tree-dump "with 0" "fre" } } */
/* { dg-final { scan-tree-dump "with 1" "fre" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump "with 3" "fre" } } */
/* { dg-final { scan-tree-dump "with 3" "fre" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump "with 4" "fre" } } */
/* { dg-final { scan-tree-dump "with 5" "fre" } } */
/* { dg-final { scan-tree-dump "with 8" "fre" } } */
/* { dg-final { scan-tree-dump "with 8" "fre" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-not "return 2;" "optimized" } } */
/* { dg-final { scan-tree-dump-not "return 6;" "optimized" } } */
/* { dg-final { scan-tree-dump-not "return 7;" "optimized" } } */

3
gcc/tree-ssa-operands.c
View File

@ -1523,7 +1523,8 @@ get_addr_dereference_operands (tree stmt, tree *addr, int flags, tree full_ref,
if (dump_file
&& TREE_CODE (ptr) == SSA_NAME
&& (pi == NULL
|| pi->name_mem_tag == NULL_TREE))
|| (pi->name_mem_tag == NULL_TREE
&& !pi->pt_anything)))
{
fprintf (dump_file,
"NOTE: no flow-sensitive alias info for ");

43
gcc/tree-ssa-structalias.c
View File

@ -4721,32 +4721,6 @@ set_used_smts (void)
}
}
/* Merge the necessary SMT's into the bitmap INTO, which is
P's varinfo. This involves merging all SMT's that are a subset of
the SMT necessary for P. */
static void
merge_smts_into (tree p, bitmap solution)
{
tree smt;
bitmap aliases;
tree var = p;
if (TREE_CODE (p) == SSA_NAME)
var = SSA_NAME_VAR (p);
smt = var_ann (var)->symbol_mem_tag;
if (smt)
{
/* The smt itself isn't included in its aliases. */
bitmap_set_bit (solution, DECL_UID (smt));
aliases = MTAG_ALIASES (smt);
if (aliases)
bitmap_ior_into (solution, aliases);
}
}
/* Given a pointer variable P, fill in its points-to set, or return
false if we can't.
Rather than return false for variables that point-to anything, we
@ -4828,19 +4802,18 @@ find_what_p_points_to (tree p)
}
}
/* Instead of doing extra work, simply do not create
points-to information for pt_anything pointers. This
will cause the operand scanner to fall back to the
type-based SMT and its aliases. Which is the best
we could do here for the points-to set as well. */
if (was_pt_anything)
return false;
/* Share the final set of variables when possible. */
finished_solution = BITMAP_GGC_ALLOC ();
stats.points_to_sets_created++;
/* Instead of using pt_anything, we merge in the SMT aliases
for the underlying SMT. In addition, if they could have
pointed to anything, they could point to global memory. */
if (was_pt_anything)
{
merge_smts_into (p, finished_solution);
pi->pt_global_mem = 1;
}
set_uids_in_ptset (p, finished_solution, vi->solution,
vi->directly_dereferenced,
vi->no_tbaa_pruning);