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re PR tree-optimization/49651 (nested lambdas and -O3 produced incorrect integer variable increments)

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2012-01-04  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/49651
	* tree-ssa-structalias.c (type_can_have_subvars): New function.
	(var_can_have_subvars): Use it.
	(get_constraint_for_1): Only consider subfields if there
	can be any.

	* gcc.dg/tree-ssa/pta-ptrarith-1.c: Adjust.
	* gcc.dg/tree-ssa/pta-ptrarith-2.c: Likewise.

From-SVN: r182865
This commit is contained in:
Richard Guenther 2012-01-04 09:47:12 +00:00 • committed by Richard Biener
parent 53618d0275
commit b4cf8c9da2
5 changed files with 29 additions and 8 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2012-01-04 Richard Guenther <rguenther@suse.de>
PR tree-optimization/49651
* tree-ssa-structalias.c (type_can_have_subvars): New function.
(var_can_have_subvars): Use it.
(get_constraint_for_1): Only consider subfields if there
can be any.
2012-01-03 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/51725

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2012-01-04 Richard Guenther <rguenther@suse.de>
PR tree-optimization/49651
* gcc.dg/tree-ssa/pta-ptrarith-1.c: Adjust.
* gcc.dg/tree-ssa/pta-ptrarith-2.c: Likewise.
2012-01-03 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/51738

2
gcc/testsuite/gcc.dg/tree-ssa/pta-ptrarith-1.c
View file

@ -1,5 +1,5 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-ccp -fdump-tree-ealias" } */
/* { dg-options "-O2 -fno-tree-forwprop -fno-tree-ccp -fdump-tree-ealias" } */
extern void abort (void);
struct X {

2
gcc/testsuite/gcc.dg/tree-ssa/pta-ptrarith-2.c
View file

@ -1,5 +1,5 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-ccp -fdump-tree-ealias" } */
/* { dg-options "-O2 -fno-tree-forwprop -fno-tree-ccp -fdump-tree-ealias" } */
extern void abort (void);
struct X {

19
gcc/tree-ssa-structalias.c
View file

@ -303,6 +303,7 @@ static varinfo_t first_vi_for_offset (varinfo_t, unsigned HOST_WIDE_INT);
static varinfo_t first_or_preceding_vi_for_offset (varinfo_t,
unsigned HOST_WIDE_INT);
static varinfo_t lookup_vi_for_tree (tree);
static inline bool type_can_have_subvars (const_tree);
/* Pool of variable info structures. */
static alloc_pool variable_info_pool;
@ -3275,7 +3276,8 @@ get_constraint_for_1 (tree t, VEC (ce_s, heap) **results, bool address_p,
return;
cs = *VEC_last (ce_s, *results);
if (cs.type == DEREF)
if (cs.type == DEREF
&& type_can_have_subvars (TREE_TYPE (t)))
{
/* For dereferences this means we have to defer it
to solving time. */
@ -5043,6 +5045,15 @@ sort_fieldstack (VEC(fieldoff_s,heap) *fieldstack)
VEC_qsort (fieldoff_s, fieldstack, fieldoff_compare);
}
/* Return true if T is a type that can have subvars. */
static inline bool
type_can_have_subvars (const_tree t)
{
/* Aggregates without overlapping fields can have subvars. */
return TREE_CODE (t) == RECORD_TYPE;
}
/* Return true if V is a tree that we can have subvars for.
Normally, this is any aggregate type. Also complex
types which are not gimple registers can have subvars. */
@ -5058,11 +5069,7 @@ var_can_have_subvars (const_tree v)
if (!DECL_P (v))
return false;
/* Aggregates without overlapping fields can have subvars. */
if (TREE_CODE (TREE_TYPE (v)) == RECORD_TYPE)
return true;
return false;
return type_can_have_subvars (TREE_TYPE (v));
}
/* Return true if T is a type that does contain pointers. */