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emit-rtl.c (set_mem_attributes_minus_bitpos): Remove alignment computations and rely on get_object_alignment_1 for the... 

2013-03-26  Richard Biener  <rguenther@suse.de>

	* emit-rtl.c (set_mem_attributes_minus_bitpos): Remove
	alignment computations and rely on get_object_alignment_1
	for the !TYPE_P case.
	Commonize DECL/COMPONENT_REF handling in the ARRAY_REF path.

From-SVN: r197095
This commit is contained in:
Richard Biener 2013-03-26 09:14:59 +00:00 committed by Richard Biener
parent cbcdb1406c
commit 30b0317cb9
2 changed files with 24 additions and 81 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2013-03-26 Richard Biener <rguenther@suse.de>
* emit-rtl.c (set_mem_attributes_minus_bitpos): Remove
alignment computations and rely on get_object_alignment_1
for the !TYPE_P case.
Commonize DECL/COMPONENT_REF handling in the ARRAY_REF path.
2013-03-26 Walter Lee <walt@tilera.com>
* config/tilegx/tilegx.h (PROFILE_BEFORE_PROLOGUE): Define.

98
gcc/emit-rtl.c
View File

@ -1653,51 +1653,17 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
if (objectp || TREE_CODE (t) == INDIRECT_REF || TYPE_ALIGN_OK (type))
attrs.align = MAX (attrs.align, TYPE_ALIGN (type));
else if (TREE_CODE (t) == MEM_REF)
{
tree op0 = TREE_OPERAND (t, 0);
if (TREE_CODE (op0) == ADDR_EXPR
&& (DECL_P (TREE_OPERAND (op0, 0))
|| CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))))
{
if (DECL_P (TREE_OPERAND (op0, 0)))
attrs.align = DECL_ALIGN (TREE_OPERAND (op0, 0));
else if (CONSTANT_CLASS_P (TREE_OPERAND (op0, 0)))
{
attrs.align = TYPE_ALIGN (TREE_TYPE (TREE_OPERAND (op0, 0)));
#ifdef CONSTANT_ALIGNMENT
attrs.align = CONSTANT_ALIGNMENT (TREE_OPERAND (op0, 0),
attrs.align);
#endif
}
if (TREE_INT_CST_LOW (TREE_OPERAND (t, 1)) != 0)
{
unsigned HOST_WIDE_INT ioff
= TREE_INT_CST_LOW (TREE_OPERAND (t, 1));
unsigned HOST_WIDE_INT aoff = (ioff & -ioff) * BITS_PER_UNIT;
attrs.align = MIN (aoff, attrs.align);
}
}
else
/* ??? This isn't fully correct, we can't set the alignment from the
type in all cases. */
attrs.align = MAX (attrs.align, TYPE_ALIGN (type));
}
else if (TREE_CODE (t) == TARGET_MEM_REF)
/* ??? This isn't fully correct, we can't set the alignment from the
type in all cases. */
attrs.align = MAX (attrs.align, TYPE_ALIGN (type));
/* If the size is known, we can set that. */
tree new_size = TYPE_SIZE_UNIT (type);
/* The address-space is that of the type. */
as = TYPE_ADDR_SPACE (type);
/* If T is not a type, we may be able to deduce some more information about
the expression. */
if (! TYPE_P (t))
{
tree base;
bool align_computed = false;
if (TREE_THIS_VOLATILE (t))
MEM_VOLATILE_P (ref) = 1;
@ -1727,6 +1693,7 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
&& TREE_STATIC (base))
MEM_READONLY_P (ref) = 1;
/* Address-space information is on the base object. */
if (TREE_CODE (base) == MEM_REF
|| TREE_CODE (base) == TARGET_MEM_REF)
as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (base,
@ -1734,8 +1701,6 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
else
as = TYPE_ADDR_SPACE (TREE_TYPE (base));
}
else
as = TYPE_ADDR_SPACE (type);
/* If this expression uses it's parent's alias set, mark it such
that we won't change it. */
@ -1750,19 +1715,11 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
attrs.offset = 0;
apply_bitpos = bitpos;
new_size = DECL_SIZE_UNIT (t);
attrs.align = DECL_ALIGN (t);
align_computed = true;
}
/* If this is a constant, we know the alignment. */
/* ??? If we end up with a constant here do record a MEM_EXPR. */
else if (CONSTANT_CLASS_P (t))
{
attrs.align = TYPE_ALIGN (type);
#ifdef CONSTANT_ALIGNMENT
attrs.align = CONSTANT_ALIGNMENT (t, attrs.align);
#endif
align_computed = true;
}
;
/* If this is a field reference, record it. */
else if (TREE_CODE (t) == COMPONENT_REF)
@ -1807,24 +1764,8 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
}
while (TREE_CODE (t2) == ARRAY_REF);
if (DECL_P (t2))
{
attrs.expr = t2;
attrs.offset_known_p = false;
if (host_integerp (off_tree, 1))
{
HOST_WIDE_INT ioff = tree_low_cst (off_tree, 1);
HOST_WIDE_INT aoff = (ioff & -ioff) * BITS_PER_UNIT;
attrs.align = DECL_ALIGN (t2);
if (aoff && (unsigned HOST_WIDE_INT) aoff < attrs.align)
attrs.align = aoff;
align_computed = true;
attrs.offset_known_p = true;
attrs.offset = ioff;
apply_bitpos = bitpos;
}
}
else if (TREE_CODE (t2) == COMPONENT_REF)
if (DECL_P (t2)
|| TREE_CODE (t2) == COMPONENT_REF)
{
attrs.expr = t2;
attrs.offset_known_p = false;
@ -1834,9 +1775,8 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
attrs.offset = tree_low_cst (off_tree, 1);
apply_bitpos = bitpos;
}
/* ??? Any reason the field size would be different than
the size we got from the type? */
}
/* Else do not record a MEM_EXPR. */
}
/* If this is an indirect reference, record it. */
@ -1849,19 +1789,15 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
apply_bitpos = bitpos;
}
if (!align_computed)
{
unsigned int obj_align;
unsigned HOST_WIDE_INT obj_bitpos;
get_object_alignment_1 (t, &obj_align, &obj_bitpos);
obj_bitpos = (obj_bitpos - bitpos) & (obj_align - 1);
if (obj_bitpos != 0)
obj_align = (obj_bitpos & -obj_bitpos);
attrs.align = MAX (attrs.align, obj_align);
}
/* Compute the alignment. */
unsigned int obj_align;
unsigned HOST_WIDE_INT obj_bitpos;
get_object_alignment_1 (t, &obj_align, &obj_bitpos);
obj_bitpos = (obj_bitpos - bitpos) & (obj_align - 1);
if (obj_bitpos != 0)
obj_align = (obj_bitpos & -obj_bitpos);
attrs.align = MAX (attrs.align, obj_align);
}
else
as = TYPE_ADDR_SPACE (type);
if (host_integerp (new_size, 1))
{