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From-SVN: r14542
This commit is contained in:
Jason Merrill 1997-07-28 17:42:09 +00:00
parent f0eebf28c4
commit 429baef53a
1 changed files with 16 additions and 4 deletions
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20
gcc/stor-layout.c
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@ -835,6 +835,8 @@ layout_type (type)
if (TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
{
tree field;
enum machine_mode mode = VOIDmode;
/* A record which has any BLKmode members must itself be BLKmode;
it can't go in a register.
Unless the member is BLKmode only because it isn't aligned. */
@ -860,13 +862,23 @@ layout_type (type)
!= ((TREE_INT_CST_LOW (DECL_SIZE (field)) + bitpos - 1)
/ BITS_PER_WORD)
/* But there is no problem if the field is entire words. */
&& TREE_INT_CST_LOW (DECL_SIZE (field)) % BITS_PER_WORD == 0)
&& TREE_INT_CST_LOW (DECL_SIZE (field)) % BITS_PER_WORD != 0)
goto record_lose;
/* If this field is the whole struct, remember its mode so
that, say, we can put a double in a class into a DF
register instead of forcing it to live in the stack. */
if (simple_cst_equal (TYPE_SIZE (type), DECL_SIZE (field)))
mode = DECL_MODE (field);
}
TYPE_MODE (type)
= mode_for_size (TREE_INT_CST_LOW (TYPE_SIZE (type)),
MODE_INT, 1);
if (mode != VOIDmode)
/* We only have one real field; use its mode. */
TYPE_MODE (type) = mode;
else
TYPE_MODE (type)
= mode_for_size (TREE_INT_CST_LOW (TYPE_SIZE (type)),
MODE_INT, 1);
/* If structure's known alignment is less than
what the scalar mode would need, and it matters,