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stor-layout.c (get_mode_alignment): make it work when BITS_PER_UNIT is not a power of two.

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* stor-layout.c (get_mode_alignment): make it work when
        BITS_PER_UNIT is not a power of two.
        * builtins.c (get_pointer_alignment): Likewise.

From-SVN: r44322
This commit is contained in:
Lars Brinkhoff 2001-07-25 01:19:23 +00:00 committed by Richard Henderson
parent 5a2aa3bd76
commit 0c23768840
3 changed files with 10 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2001-07-24 Lars Brinkhoff <lars@nocrew.org>
* stor-layout.c (get_mode_alignment): make it work when
BITS_PER_UNIT is not a power of two.
* builtins.c (get_pointer_alignment): Likewise.
2001-07-24 Richard Henderson <rth@redhat.com>
* simplify-rtx.c (avoid_constant_pool_reference): Coerce

4
gcc/builtins.c
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@ -186,8 +186,8 @@ get_pointer_alignment (exp, max_align)
if (! host_integerp (TREE_OPERAND (exp, 1), 1))
return align;
while (((tree_low_cst (TREE_OPERAND (exp, 1), 1) * BITS_PER_UNIT)
& (max_align - 1))
while (((tree_low_cst (TREE_OPERAND (exp, 1), 1))
& (max_align / BITS_PER_UNIT - 1))
!= 0)
max_align >>= 1;

3
gcc/stor-layout.c
View File

@ -1866,10 +1866,11 @@ unsigned int
get_mode_alignment (mode)
enum machine_mode mode;
{
unsigned int alignment = GET_MODE_UNIT_SIZE (mode) * BITS_PER_UNIT;
unsigned int alignment = GET_MODE_UNIT_SIZE (mode);
/* Extract the LSB of the size. */
alignment = alignment & -alignment;
alignment *= BITS_PER_UNIT;
alignment = MIN (BIGGEST_ALIGNMENT, MAX (1, alignment));
return alignment;