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tree-ssa-loop-ivopts.c (strip_offset_1): Change parameter type.

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* tree-ssa-loop-ivopts.c (strip_offset_1): Change parameter type.
	Count DECL_FIELD_BIT_OFFSET for COMPONENT_REF.
	(strip_offset): Convert offset to unsigned number.

From-SVN: r204116
This commit is contained in:
Bin Cheng 2013-10-28 03:26:58 +00:00 • committed by Bin Cheng
parent b72631e851
commit 58fe50d5c9
2 changed files with 37 additions and 15 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2013-10-28 Bin Cheng <bin.cheng@arm.com>
* tree-ssa-loop-ivopts.c (strip_offset_1): Change parameter type.
Count DECL_FIELD_BIT_OFFSET for COMPONENT_REF.
(strip_offset): Convert offset to unsigned number.
2013-10-27 Tom de Vries <tom@codesourcery.com>
* cfgexpand.c (gimple_expand_cfg): Remove test for parm_birth_insn.

46
gcc/tree-ssa-loop-ivopts.c
View file

@ -2023,12 +2023,12 @@ find_interesting_uses (struct ivopts_data *data)
static tree
strip_offset_1 (tree expr, bool inside_addr, bool top_compref,
unsigned HOST_WIDE_INT *offset)
HOST_WIDE_INT *offset)
{
tree op0 = NULL_TREE, op1 = NULL_TREE, tmp, step;
enum tree_code code;
tree type, orig_type = TREE_TYPE (expr);
unsigned HOST_WIDE_INT off0, off1, st;
HOST_WIDE_INT off0, off1, st;
tree orig_expr = expr;
STRIP_NOPS (expr);
@ -2119,19 +2119,32 @@ strip_offset_1 (tree expr, bool inside_addr, bool top_compref,
break;
case COMPONENT_REF:
if (!inside_addr)
return orig_expr;
{
tree field;
tmp = component_ref_field_offset (expr);
if (top_compref
&& cst_and_fits_in_hwi (tmp))
{
/* Strip the component reference completely. */
op0 = TREE_OPERAND (expr, 0);
op0 = strip_offset_1 (op0, inside_addr, top_compref, &off0);
*offset = off0 + int_cst_value (tmp);
return op0;
}
if (!inside_addr)
return orig_expr;
tmp = component_ref_field_offset (expr);
field = TREE_OPERAND (expr, 1);
if (top_compref
&& cst_and_fits_in_hwi (tmp)
&& cst_and_fits_in_hwi (DECL_FIELD_BIT_OFFSET (field)))
{
HOST_WIDE_INT boffset, abs_off;
/* Strip the component reference completely. */
op0 = TREE_OPERAND (expr, 0);
op0 = strip_offset_1 (op0, inside_addr, top_compref, &off0);
boffset = int_cst_value (DECL_FIELD_BIT_OFFSET (field));
abs_off = abs_hwi (boffset) / BITS_PER_UNIT;
if (boffset < 0)
abs_off = -abs_off;
*offset = off0 + int_cst_value (tmp) + abs_off;
return op0;
}
}
break;
case ADDR_EXPR:
@ -2182,7 +2195,10 @@ strip_offset_1 (tree expr, bool inside_addr, bool top_compref,
static tree
strip_offset (tree expr, unsigned HOST_WIDE_INT *offset)
{
return strip_offset_1 (expr, false, false, offset);
HOST_WIDE_INT off;
tree core = strip_offset_1 (expr, false, false, &off);
*offset = off;
return core;
}
/* Returns variant of TYPE that can be used as base for different uses.