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calls.c (store_one_arg): Rename default_align to parm_align; always adjust parm_align for downward padding. 

* calls.c (store_one_arg): Rename default_align to parm_align;
	always adjust parm_align for downward padding.

From-SVN: r57292
This commit is contained in:
Richard Henderson 2002-09-18 17:37:24 -07:00 committed by Richard Henderson
parent 724838b9aa
commit 1b1f20cab9
2 changed files with 25 additions and 12 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-09-18 Richard Henderson <rth@redhat.com>
* calls.c (store_one_arg): Rename default_align to parm_align;
always adjust parm_align for downward padding.
2002-09-18 Richard Henderson <rth@redhat.com>
* toplev.c (backend_init): Move init_real_once invocation ...

32
gcc/calls.c
View File

@ -4491,7 +4491,7 @@ store_one_arg (arg, argblock, flags, variable_size, reg_parm_stack_space)
{
/* BLKmode, at least partly to be pushed. */
unsigned int default_align = PARM_BOUNDARY;
unsigned int parm_align;
int excess;
rtx size_rtx;
@ -4499,13 +4499,6 @@ store_one_arg (arg, argblock, flags, variable_size, reg_parm_stack_space)
If part is passed in registers, PARTIAL says how much
and emit_push_insn will take care of putting it there. */
#ifdef ARGS_GROW_DOWNWARD
/* When an argument is padded down, the block is not aligned to
PARM_BOUNDARY. */
if (FUNCTION_ARG_PADDING (arg->mode, TREE_TYPE (pval)) == downward)
default_align = BITS_PER_UNIT;
#endif
/* Round its size up to a multiple
of the allocation unit for arguments. */
@ -4524,6 +4517,23 @@ store_one_arg (arg, argblock, flags, variable_size, reg_parm_stack_space)
NULL_RTX, TYPE_MODE (sizetype), 0);
}
/* Some types will require stricter alignment, which will be
provided for elsewhere in argument layout. */
parm_align = MAX (PARM_BOUNDARY, TYPE_ALIGN (TREE_TYPE (pval)));
/* When an argument is padded down, the block is aligned to
PARM_BOUNDARY, but the actual argument isn't. */
if (FUNCTION_ARG_PADDING (arg->mode, TREE_TYPE (pval)) == downward)
{
if (arg->size.var)
parm_align = BITS_PER_UNIT;
else if (excess)
{
int excess_align = (excess & -excess) * BITS_PER_UNIT;
parm_align = MIN (parm_align, excess_align);
}
}
if ((flags & ECF_SIBCALL) && GET_CODE (arg->value) == MEM)
{
/* emit_push_insn might not work properly if arg->value and
@ -4581,8 +4591,7 @@ store_one_arg (arg, argblock, flags, variable_size, reg_parm_stack_space)
{
rtx size_rtx1 = GEN_INT (reg_parm_stack_space - arg->offset.constant);
emit_push_insn (arg->value, arg->mode, TREE_TYPE (pval), size_rtx1,
MAX (default_align, TYPE_ALIGN (TREE_TYPE (pval))),
partial, reg, excess, argblock,
parm_align, partial, reg, excess, argblock,
ARGS_SIZE_RTX (arg->offset), reg_parm_stack_space,
ARGS_SIZE_RTX (arg->alignment_pad));
}
@ -4590,8 +4599,7 @@ store_one_arg (arg, argblock, flags, variable_size, reg_parm_stack_space)
emit_push_insn (arg->value, arg->mode, TREE_TYPE (pval), size_rtx,
MAX (default_align, TYPE_ALIGN (TREE_TYPE (pval))),
partial, reg, excess, argblock,
parm_align, partial, reg, excess, argblock,
ARGS_SIZE_RTX (arg->offset), reg_parm_stack_space,
ARGS_SIZE_RTX (arg->alignment_pad));