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varasm.c (output_constant_pool): Use floor_log2 instead of exact_log2 for ASM_OUTPUT_ALIGN. 

Thu Jan 21 14:13:31 1999  Vladimir N. Makarov  <vmakarov@cygnus.com>
        * varasm.c (output_constant_pool): Use floor_log2 instead of
	exact_log2 for ASM_OUTPUT_ALIGN.
	* stor-layout.c (layout_type): Do machine-dependent extra alignment.
	* emit-rtl.c (operand_subword): Handle case when a subword outside
	the operand.
	* tm.texi (ROUND_TYPE_{SIZE,ALIGN}): More accurate descriptions of
	the macros.

From-SVN: r24800
This commit is contained in:
Vladimir N. Makarov 1999-01-21 11:20:09 +00:00 committed by Vladimir Makarov
parent 7fcbfb22d5
commit 0003feb203
5 changed files with 42 additions and 13 deletions
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13
gcc/ChangeLog
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@ -1,3 +1,16 @@
Thu Jan 21 14:13:31 1999 Vladimir N. Makarov <vmakarov@cygnus.com>
* varasm.c (output_constant_pool): Use floor_log2 instead of
exact_log2 for ASM_OUTPUT_ALIGN.
* stor-layout.c (layout_type): Do machine-dependent extra alignment.
* emit-rtl.c (operand_subword): Handle case when a subword outside
the operand.
* tm.texi (ROUND_TYPE_{SIZE,ALIGN}): More accurate descriptions of
the macros.
Thu Jan 21 01:59:30 1999 Richard Henderson <rth@cygnus.com>
* cse.c (fold_rtx): Revert 29 Dec change.

10
gcc/emit-rtl.c
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@ -1136,12 +1136,16 @@ operand_subword (op, i, validate_address, mode)
if (mode == VOIDmode)
abort ();
/* If OP is narrower than a word or if we want a word outside OP, fail. */
/* If OP is narrower than a word, fail. */
if (mode != BLKmode
&& (GET_MODE_SIZE (mode) < UNITS_PER_WORD
|| (i + 1) * UNITS_PER_WORD > GET_MODE_SIZE (mode)))
&& (GET_MODE_SIZE (mode) < UNITS_PER_WORD))
return 0;
/* If we want a word outside OP, return zero. */
if (mode != BLKmode
&& (i + 1) * UNITS_PER_WORD > GET_MODE_SIZE (mode))
return const0_rtx;
/* If OP is already an integer word, return it. */
if (GET_MODE_CLASS (mode) == MODE_INT
&& GET_MODE_SIZE (mode) == UNITS_PER_WORD)

12
gcc/stor-layout.c
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@ -1085,6 +1085,18 @@ layout_type (type)
&& TREE_CODE (type) != ARRAY_TYPE)))
TYPE_ALIGN (type) = GET_MODE_ALIGNMENT (TYPE_MODE (type));
/* Do machine-dependent extra alignment. */
#ifdef ROUND_TYPE_ALIGN
TYPE_ALIGN (type)
= ROUND_TYPE_ALIGN (type, TYPE_ALIGN (type), BITS_PER_UNIT);
#endif
#ifdef ROUND_TYPE_SIZE
if (TYPE_SIZE (type) != 0)
TYPE_SIZE (type)
= ROUND_TYPE_SIZE (type, TYPE_SIZE (type), TYPE_ALIGN (type));
#endif
/* Evaluate nonconstant size only once, either now or as soon as safe. */
if (TYPE_SIZE (type) != 0 && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
TYPE_SIZE (type) = variable_size (TYPE_SIZE (type));

18
gcc/tm.texi
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@ -966,18 +966,18 @@ Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to
aligning a bitfield within the structure.
@findex ROUND_TYPE_SIZE
@item ROUND_TYPE_SIZE (@var{struct}, @var{size}, @var{align})
Define this macro as an expression for the overall size of a structure
(given by @var{struct} as a tree node) when the size computed from the
fields is @var{size} and the alignment is @var{align}.
@item ROUND_TYPE_SIZE (@var{type}, @var{computed}, @var{specified})
Define this macro as an expression for the overall size of a type
(given by @var{type} as a tree node) when the size computed in the
usual way is @var{computed} and the alignment is @var{specified}.
The default is to round @var{size} up to a multiple of @var{align}.
The default is to round @var{computed} up to a multiple of @var{specified}.
@findex ROUND_TYPE_ALIGN
@item ROUND_TYPE_ALIGN (@var{struct}, @var{computed}, @var{specified})
Define this macro as an expression for the alignment of a structure
(given by @var{struct} as a tree node) if the alignment computed in the
usual way is @var{computed} and the alignment explicitly specified was
@item ROUND_TYPE_ALIGN (@var{type}, @var{computed}, @var{specified})
Define this macro as an expression for the alignment of a type (given
by @var{type} as a tree node) if the alignment computed in the usual
way is @var{computed} and the alignment explicitly specified was
@var{specified}.
The default is to use @var{specified} if it is larger; otherwise, use

2
gcc/varasm.c
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@ -3634,7 +3634,7 @@ output_constant_pool (fnname, fndecl)
#endif
if (pool->align > 1)
ASM_OUTPUT_ALIGN (asm_out_file, exact_log2 (pool->align));
ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (pool->align));
/* Output the label. */
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LC", pool->labelno);