OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

stor-layout.c (round_up, round_down): Move ...

Browse Source 
* stor-layout.c (round_up, round_down): Move ...
        * fold-const.c (round_up, round_down): ... here.  Use
        multiple_of_p to avoid any arithmetic at all.

From-SVN: r85848
This commit is contained in:
Richard Henderson 2004-08-11 21:01:04 -07:00 committed by Richard Henderson
parent 57d1dd8704
commit 159319544b
3 changed files with 76 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2004-08-12 Richard Henderson <rth@redhat.com>
* stor-layout.c (round_up, round_down): Move ...
* fold-const.c (round_up, round_down): ... here. Use
multiple_of_p to avoid any arithmetic at all.
2004-08-12 Richard Henderson <rth@redhat.com>
* gimplify.c (struct gimplify_init_ctor_preeval_data): New.

70
gcc/fold-const.c
View File

@ -10678,4 +10678,74 @@ fold_ignored_result (tree t)
}
}
/* Return the value of VALUE, rounded up to a multiple of DIVISOR.
This can only be applied to objects of a sizetype. */
tree
round_up (tree value, int divisor)
{
tree div, t;
if (divisor == 0)
abort ();
if (divisor == 1)
return value;
div = size_int_type (divisor, TREE_TYPE (value));
/* See if VALUE is already a multiple of DIVISOR. If so, we don't
have to do anything. */
if (multiple_of_p (TREE_TYPE (value), value, div))
return value;
/* If divisor is a power of two, simplify this to bit manipulation. */
if (divisor == (divisor & -divisor))
{
t = size_int_type (divisor - 1, TREE_TYPE (value));
value = size_binop (PLUS_EXPR, value, t);
t = size_int_type (-divisor, TREE_TYPE (value));
value = size_binop (BIT_AND_EXPR, value, t);
}
else
{
value = size_binop (CEIL_DIV_EXPR, value, div);
value = size_binop (MULT_EXPR, value, div);
}
return value;
}
/* Likewise, but round down. */
tree
round_down (tree value, int divisor)
{
tree div, t;
if (divisor == 0)
abort ();
if (divisor == 1)
return value;
div = size_int_type (divisor, TREE_TYPE (value));
/* See if VALUE is already a multiple of DIVISOR. If so, we don't
have to do anything. */
if (multiple_of_p (TREE_TYPE (value), value, div))
return value;
/* If divisor is a power of two, simplify this to bit manipulation. */
if (divisor == (divisor & -divisor))
{
t = size_int_type (-divisor, TREE_TYPE (value));
value = size_binop (BIT_AND_EXPR, value, t);
}
else
{
value = size_binop (FLOOR_DIV_EXPR, value, div);
value = size_binop (MULT_EXPR, value, div);
}
return value;
}
#include "gt-fold-const.h"

58
gcc/stor-layout.c
View File

@ -269,64 +269,6 @@ get_mode_alignment (enum machine_mode mode)
return MIN (BIGGEST_ALIGNMENT, MAX (1, mode_base_align[mode]*BITS_PER_UNIT));
}
/* Return the value of VALUE, rounded up to a multiple of DIVISOR.
This can only be applied to objects of a sizetype. */
tree
round_up (tree value, int divisor)
{
tree t;
if (divisor == 0)
abort ();
if (divisor == 1)
return value;
/* If divisor is a power of two, simplify this to bit manipulation. */
if (divisor == (divisor & -divisor))
{
t = size_int_type (divisor - 1, TREE_TYPE (value));
value = size_binop (PLUS_EXPR, value, t);
t = size_int_type (-divisor, TREE_TYPE (value));
value = size_binop (BIT_AND_EXPR, value, t);
}
else
{
t = size_int_type (divisor, TREE_TYPE (value));
value = size_binop (CEIL_DIV_EXPR, value, t);
value = size_binop (MULT_EXPR, value, t);
}
return value;
}
/* Likewise, but round down. */
tree
round_down (tree value, int divisor)
{
tree t;
if (divisor == 0)
abort ();
if (divisor == 1)
return value;
/* If divisor is a power of two, simplify this to bit manipulation. */
if (divisor == (divisor & -divisor))
{
t = size_int_type (-divisor, TREE_TYPE (value));
value = size_binop (BIT_AND_EXPR, value, t);
}
else
{
t = size_int_type (divisor, TREE_TYPE (value));
value = size_binop (FLOOR_DIV_EXPR, value, t);
value = size_binop (MULT_EXPR, value, t);
}
return value;
}
/* Subroutine of layout_decl: Force alignment required for the data type.
But if the decl itself wants greater alignment, don't override that. */