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alias.c (alias_invariant, [...]): Remove.

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* alias.c (alias_invariant, alias_invariant_size): Remove.
	(record_base_value): Remove.
        (memrefs_conflict_p): Don't look at alias_invariant.
        (end_alias_analysis): Don't free it.
        * alias.h (record_base_value): Remove prototype.

From-SVN: r111574
This commit is contained in:
Steven Bosscher 2006-02-28 21:01:20 +00:00 committed by Steven Bosscher
parent d3b7269024
commit 63292ebfb4
3 changed files with 8 additions and 62 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2006-02-28 Steven Bosscher <stevenb.gcc@gmail.com>
* alias.c (alias_invariant, alias_invariant_size): Remove.
(record_base_value): Remove.
(memrefs_conflict_p): Don't look at alias_invariant.
(end_alias_analysis): Don't free it.
* alias.h (record_base_value): Remove prototype.
2006-02-28 Paolo Bonzini <bonzini@gnu.org>
Adam Nemet <anemet@caviumnetworks.com>

61
gcc/alias.c
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@ -222,17 +222,6 @@ static GTY (()) rtx static_reg_base_value[FIRST_PSEUDO_REGISTER];
(reg_base_value && REGNO (X) < VARRAY_SIZE (reg_base_value) \
? VARRAY_RTX (reg_base_value, REGNO (X)) : 0)
/* Vector of known invariant relationships between registers. Set in
loop unrolling. Indexed by register number, if nonzero the value
is an expression describing this register in terms of another.
The length of this array is REG_BASE_VALUE_SIZE.
Because this array contains only pseudo registers it has no effect
after reload. */
static GTY((length("alias_invariant_size"))) rtx *alias_invariant;
static GTY(()) unsigned int alias_invariant_size;
/* Vector indexed by N giving the initial (unchanging) value known for
pseudo-register N. This array is initialized in init_alias_analysis,
and does not change until end_alias_analysis is called. */
@ -1079,31 +1068,6 @@ record_set (rtx dest, rtx set, void *data ATTRIBUTE_UNUSED)
reg_seen[regno] = 1;
}
/* Called from loop optimization when a new pseudo-register is
created. It indicates that REGNO is being set to VAL. f INVARIANT
is true then this value also describes an invariant relationship
which can be used to deduce that two registers with unknown values
are different. */
void
record_base_value (unsigned int regno, rtx val, int invariant)
{
if (invariant && alias_invariant && regno < alias_invariant_size)
alias_invariant[regno] = val;
if (regno >= VARRAY_SIZE (reg_base_value))
VARRAY_GROW (reg_base_value, max_reg_num ());
if (REG_P (val))
{
VARRAY_RTX (reg_base_value, regno)
= REG_BASE_VALUE (val);
return;
}
VARRAY_RTX (reg_base_value, regno)
= find_base_value (val);
}
/* Clear alias info for a register. This is used if an RTL transformation
changes the value of a register. This is used in flow by AUTO_INC_DEC
optimizations. We don't need to clear reg_base_value, since flow only
@ -1792,25 +1756,6 @@ memrefs_conflict_p (int xsize, rtx x, int ysize, rtx y, HOST_WIDE_INT c)
return memrefs_conflict_p (xsize, x0, ysize, y0, c);
}
case REG:
/* Are these registers known not to be equal? */
if (alias_invariant)
{
unsigned int r_x = REGNO (x), r_y = REGNO (y);
rtx i_x, i_y; /* invariant relationships of X and Y */
i_x = r_x >= alias_invariant_size ? 0 : alias_invariant[r_x];
i_y = r_y >= alias_invariant_size ? 0 : alias_invariant[r_y];
if (i_x == 0 && i_y == 0)
break;
if (! memrefs_conflict_p (xsize, i_x ? i_x : x,
ysize, i_y ? i_y : y, c))
return 0;
}
break;
default:
break;
}
@ -2696,12 +2641,6 @@ end_alias_analysis (void)
reg_known_value_size = 0;
free (reg_known_equiv_p);
reg_known_equiv_p = 0;
if (alias_invariant)
{
ggc_free (alias_invariant);
alias_invariant = 0;
alias_invariant_size = 0;
}
}
/* Do control and data flow analysis; write some of the results to the

1
gcc/alias.h
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@ -24,7 +24,6 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
extern HOST_WIDE_INT new_alias_set (void);
extern HOST_WIDE_INT get_varargs_alias_set (void);
extern HOST_WIDE_INT get_frame_alias_set (void);
extern void record_base_value (unsigned int, rtx, int);
extern bool component_uses_parent_alias_set (tree);
/* This alias set can be used to force a memory to conflict with all