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re PR tree-optimization/45722 (FAIL: gcc.c-torture/execute/20040709-2.c execution at -O1 and -Os)

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PR tree-optimization/45722
	* tree-sra.c (build_ref_for_model): Always build a COMPONENT_REF if
	this is a reference to a component.
	* ipa-prop.c (ipa_get_member_ptr_load_param): Accept COMPONENT_REF.
	(ipa_note_param_call): Adjust comment.

From-SVN: r166731
This commit is contained in:
Eric Botcazou 2010-11-14 11:24:47 +00:00 committed by Eric Botcazou
parent 8926bd5d5c
commit ae788515d2
3 changed files with 38 additions and 9 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2010-11-14 Eric Botcazou <ebotcazou@adacore.com>
PR tree-optimization/45722
* tree-sra.c (build_ref_for_model): Always build a COMPONENT_REF if
this is a reference to a component.
* ipa-prop.c (ipa_get_member_ptr_load_param): Accept COMPONENT_REF.
(ipa_note_param_call): Adjust comment.
2010-11-14 Richard Sandiford <rdsandiford@googlemail.com>
* config/mips/mips.c (machine_function): Remove

32
gcc/ipa-prop.c
View File

@ -918,10 +918,15 @@ ipa_compute_jump_functions (struct cgraph_node *node,
static tree
ipa_get_member_ptr_load_param (tree rhs, bool use_delta)
{
tree rec, ref_offset, fld_offset;
tree ptr_field;
tree delta_field;
tree rec, ref_field, ref_offset, fld, fld_offset, ptr_field, delta_field;
if (TREE_CODE (rhs) == COMPONENT_REF)
{
ref_field = TREE_OPERAND (rhs, 1);
rhs = TREE_OPERAND (rhs, 0);
}
else
ref_field = NULL_TREE;
if (TREE_CODE (rhs) != MEM_REF)
return NULL_TREE;
rec = TREE_OPERAND (rhs, 0);
@ -933,6 +938,20 @@ ipa_get_member_ptr_load_param (tree rhs, bool use_delta)
return NULL_TREE;
ref_offset = TREE_OPERAND (rhs, 1);
if (ref_field)
{
if (integer_nonzerop (ref_offset))
return NULL_TREE;
if (use_delta)
fld = delta_field;
else
fld = ptr_field;
return ref_field == fld ? rec : NULL_TREE;
}
if (use_delta)
fld_offset = byte_position (delta_field);
else
@ -1004,11 +1023,16 @@ ipa_note_param_call (struct cgraph_node *node, int param_index, gimple stmt,
pattern of such a call. An example of such a pattern is the gimple dump
below, the call is on the last line:
<bb 2>:
f$__delta_5 = f.__delta;
f$__pfn_24 = f.__pfn;
or
<bb 2>:
f$__delta_5 = MEM[(struct *)&f];
f$__pfn_24 = MEM[(struct *)&f + 4B];
...
and a few lines below:
<bb 5>
D.2496_3 = (int) f$__pfn_24;

7
gcc/tree-sra.c
View File

@ -1391,7 +1391,7 @@ build_ref_for_offset (location_t loc, tree base, HOST_WIDE_INT offset,
/* Construct a memory reference to a part of an aggregate BASE at the given
OFFSET and of the same type as MODEL. In case this is a reference to a
bit-field, the function will replicate the last component_ref of model's
component, the function will replicate the last COMPONENT_REF of model's
expr to access it. GSI and INSERT_AFTER have the same meaning as in
build_ref_for_offset. */
@ -1400,12 +1400,9 @@ build_ref_for_model (location_t loc, tree base, HOST_WIDE_INT offset,
struct access *model, gimple_stmt_iterator *gsi,
bool insert_after)
{
if (TREE_CODE (model->expr) == COMPONENT_REF
&& DECL_BIT_FIELD (TREE_OPERAND (model->expr, 1)))
if (TREE_CODE (model->expr) == COMPONENT_REF)
{
/* This access represents a bit-field. */
tree t, exp_type;
offset -= int_bit_position (TREE_OPERAND (model->expr, 1));
exp_type = TREE_TYPE (TREE_OPERAND (model->expr, 0));
t = build_ref_for_offset (loc, base, offset, exp_type, gsi, insert_after);