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[NDS32] Implement DATA_ALIGNMENT, LOCAL_ALIGNMENT and TARGET_CONSTANT_ALIGNMENT.

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gcc/
	* config/nds32/nds32-protos.h (nds32_data_alignment,
	nds32_local_alignment): Declare.
	* config/nds32/nds32.c (nds32_data_alignment, nds32_constant_alignment,
	nds32_local_alignment): New functions.
	(TARGET_CONSTANT_ALIGNMENT): Define.
	* config/nds32/nds32.h (DATA_ALIGNMENT, LOCAL_ALIGNMENT): Define.

From-SVN: r259548
This commit is contained in:
Chung-Ju Wu 2018-04-22 08:19:38 +00:00 committed by Chung-Ju Wu
parent 50256c75f4
commit 79498ad8ba
4 changed files with 77 additions and 0 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2018-04-22 Chung-Ju Wu <jasonwucj@gmail.com>
* config/nds32/nds32-protos.h (nds32_data_alignment,
nds32_local_alignment): Declare.
* config/nds32/nds32.c (nds32_data_alignment, nds32_constant_alignment,
nds32_local_alignment): New functions.
(TARGET_CONSTANT_ALIGNMENT): Define.
* config/nds32/nds32.h (DATA_ALIGNMENT, LOCAL_ALIGNMENT): Define.
2018-04-22 Chung-Ju Wu <jasonwucj@gmail.com>
* config/nds32/nds32.c

2
gcc/config/nds32/nds32-protos.h
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@ -223,6 +223,8 @@ extern int nds32_can_use_return_insn (void);
/* Auxiliary functions to decide output alignment or not. */
extern int nds32_target_alignment (rtx_insn *);
extern unsigned int nds32_data_alignment (tree, unsigned int);
extern unsigned int nds32_local_alignment (tree, unsigned int);
/* Auxiliary functions to expand builtin functions. */

60
gcc/config/nds32/nds32.c
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@ -4812,6 +4812,63 @@ nds32_target_alignment (rtx_insn *label)
return 2;
}
/* Return alignment for data. */
unsigned int
nds32_data_alignment (tree data,
unsigned int basic_align)
{
if ((basic_align < BITS_PER_WORD)
&& (TREE_CODE (data) == ARRAY_TYPE
|| TREE_CODE (data) == UNION_TYPE
|| TREE_CODE (data) == RECORD_TYPE))
return BITS_PER_WORD;
else
return basic_align;
}
/* Return alignment for constant value. */
static HOST_WIDE_INT
nds32_constant_alignment (const_tree constant,
HOST_WIDE_INT basic_align)
{
/* Make string literal and constant for constructor to word align. */
if (((TREE_CODE (constant) == STRING_CST
|| TREE_CODE (constant) == CONSTRUCTOR
|| TREE_CODE (constant) == UNION_TYPE
|| TREE_CODE (constant) == RECORD_TYPE
|| TREE_CODE (constant) == ARRAY_TYPE)
&& basic_align < BITS_PER_WORD))
return BITS_PER_WORD;
else
return basic_align;
}
/* Return alignment for local variable. */
unsigned int
nds32_local_alignment (tree local ATTRIBUTE_UNUSED,
unsigned int basic_align)
{
bool at_least_align_to_word = false;
/* Make local array, struct and union at least align to word for make
sure it can unroll memcpy when initialize by constant. */
switch (TREE_CODE (local))
{
case ARRAY_TYPE:
case RECORD_TYPE:
case UNION_TYPE:
at_least_align_to_word = true;
break;
default:
at_least_align_to_word = false;
break;
}
if (at_least_align_to_word
&& (basic_align < BITS_PER_WORD))
return BITS_PER_WORD;
else
return basic_align;
}
bool
nds32_split_double_word_load_store_p(rtx *operands, bool load_p)
{
@ -4865,6 +4922,9 @@ nds32_use_blocks_for_constant_p (machine_mode mode,
#undef TARGET_EXPAND_TO_RTL_HOOK
#define TARGET_EXPAND_TO_RTL_HOOK nds32_expand_to_rtl_hook
#undef TARGET_CONSTANT_ALIGNMENT
#define TARGET_CONSTANT_ALIGNMENT nds32_constant_alignment
/* Layout of Source Language Data Types. */

6
gcc/config/nds32/nds32.h
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@ -688,6 +688,12 @@ enum nds32_builtins
#define BIGGEST_ALIGNMENT 64
#define DATA_ALIGNMENT(constant, basic_align) \
nds32_data_alignment (constant, basic_align)
#define LOCAL_ALIGNMENT(type, basic_align) \
nds32_local_alignment (type, basic_align)
#define EMPTY_FIELD_BOUNDARY 32
#define STRUCTURE_SIZE_BOUNDARY 8