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tree.h (copy_ref_info): Expose existing function. 

2011-10-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* tree.h (copy_ref_info): Expose existing function.
	* tree-ssa-loop-ivopts.c (copy_ref_info): Move function to...
	* tree-ssa-address.c (copy_ref_info): ...here, and remove static token.

From-SVN: r179818
This commit is contained in:
Bill Schmidt 2011-10-11 18:39:51 +00:00 committed by William Schmidt
parent 8efab2c5ea
commit f0286f9573
4 changed files with 70 additions and 58 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2011-10-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* tree.h (copy_ref_info): Expose existing function.
* tree-ssa-loop-ivopts.c (copy_ref_info): Move function to...
* tree-ssa-address.c (copy_ref_info): ...here, and remove static token.
2011-10-11 Georg-Johann Lay <avr@gjlay.de>
* config/avr/avr-protos.h (avr_mode_code_base_reg_class): New prototype.

63
gcc/tree-ssa-address.c
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@ -832,6 +832,69 @@ copy_mem_ref_info (tree to, tree from)
TREE_THIS_VOLATILE (to) = TREE_THIS_VOLATILE (from);
}
/* Copies the reference information from OLD_REF to NEW_REF, where
NEW_REF should be either a MEM_REF or a TARGET_MEM_REF. */
void
copy_ref_info (tree new_ref, tree old_ref)
{
tree new_ptr_base = NULL_TREE;
gcc_assert (TREE_CODE (new_ref) == MEM_REF
|| TREE_CODE (new_ref) == TARGET_MEM_REF);
TREE_SIDE_EFFECTS (new_ref) = TREE_SIDE_EFFECTS (old_ref);
TREE_THIS_VOLATILE (new_ref) = TREE_THIS_VOLATILE (old_ref);
new_ptr_base = TREE_OPERAND (new_ref, 0);
/* We can transfer points-to information from an old pointer
or decl base to the new one. */
if (new_ptr_base
&& TREE_CODE (new_ptr_base) == SSA_NAME
&& !SSA_NAME_PTR_INFO (new_ptr_base))
{
tree base = get_base_address (old_ref);
if (!base)
;
else if ((TREE_CODE (base) == MEM_REF
|| TREE_CODE (base) == TARGET_MEM_REF)
&& TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME
&& SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)))
{
struct ptr_info_def *new_pi;
duplicate_ssa_name_ptr_info
(new_ptr_base, SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)));
new_pi = SSA_NAME_PTR_INFO (new_ptr_base);
/* We have to be careful about transfering alignment information. */
if (TREE_CODE (old_ref) == MEM_REF
&& !(TREE_CODE (new_ref) == TARGET_MEM_REF
&& (TMR_INDEX2 (new_ref)
|| (TMR_STEP (new_ref)
&& (TREE_INT_CST_LOW (TMR_STEP (new_ref))
< new_pi->align)))))
{
new_pi->misalign += double_int_sub (mem_ref_offset (old_ref),
mem_ref_offset (new_ref)).low;
new_pi->misalign &= (new_pi->align - 1);
}
else
{
new_pi->align = 1;
new_pi->misalign = 0;
}
TREE_THIS_NOTRAP (new_ref) = TREE_THIS_NOTRAP (base);
}
else if (TREE_CODE (base) == VAR_DECL
|| TREE_CODE (base) == PARM_DECL
|| TREE_CODE (base) == RESULT_DECL)
{
struct ptr_info_def *pi = get_ptr_info (new_ptr_base);
pt_solution_set_var (&pi->pt, base);
}
}
}
/* Move constants in target_mem_ref REF to offset. Returns the new target
mem ref if anything changes, NULL_TREE otherwise. */

58
gcc/tree-ssa-loop-ivopts.c
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@ -6278,64 +6278,6 @@ rewrite_use_nonlinear_expr (struct ivopts_data *data,
}
}
/* Copies the reference information from OLD_REF to NEW_REF. */
static void
copy_ref_info (tree new_ref, tree old_ref)
{
tree new_ptr_base = NULL_TREE;
TREE_SIDE_EFFECTS (new_ref) = TREE_SIDE_EFFECTS (old_ref);
TREE_THIS_VOLATILE (new_ref) = TREE_THIS_VOLATILE (old_ref);
new_ptr_base = TREE_OPERAND (new_ref, 0);
/* We can transfer points-to information from an old pointer
or decl base to the new one. */
if (new_ptr_base
&& TREE_CODE (new_ptr_base) == SSA_NAME
&& !SSA_NAME_PTR_INFO (new_ptr_base))
{
tree base = get_base_address (old_ref);
if (!base)
;
else if ((TREE_CODE (base) == MEM_REF
|| TREE_CODE (base) == TARGET_MEM_REF)
&& TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME
&& SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)))
{
struct ptr_info_def *new_pi;
duplicate_ssa_name_ptr_info
(new_ptr_base, SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)));
new_pi = SSA_NAME_PTR_INFO (new_ptr_base);
/* We have to be careful about transfering alignment information. */
if (TREE_CODE (old_ref) == MEM_REF
&& !(TREE_CODE (new_ref) == TARGET_MEM_REF
&& (TMR_INDEX2 (new_ref)
|| (TMR_STEP (new_ref)
&& (TREE_INT_CST_LOW (TMR_STEP (new_ref))
< new_pi->align)))))
{
new_pi->misalign += double_int_sub (mem_ref_offset (old_ref),
mem_ref_offset (new_ref)).low;
new_pi->misalign &= (new_pi->align - 1);
}
else
{
new_pi->align = 1;
new_pi->misalign = 0;
}
}
else if (TREE_CODE (base) == VAR_DECL
|| TREE_CODE (base) == PARM_DECL
|| TREE_CODE (base) == RESULT_DECL)
{
struct ptr_info_def *pi = get_ptr_info (new_ptr_base);
pt_solution_set_var (&pi->pt, base);
}
}
}
/* Performs a peephole optimization to reorder the iv update statement with
a mem ref to enable instruction combining in later phases. The mem ref uses
the iv value before the update, so the reordering transformation requires

1
gcc/tree.h
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@ -5777,6 +5777,7 @@ tree target_for_debug_bind (tree);
/* In tree-ssa-address.c. */
extern tree tree_mem_ref_addr (tree, tree);
extern void copy_mem_ref_info (tree, tree);
extern void copy_ref_info (tree, tree);
/* In tree-vrp.c */
extern bool ssa_name_nonnegative_p (const_tree);