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stor-layout.c (update_alignment_for_field): Use ADJUST_FIELD_ALIGN when computing the alignment for a zero-width bitfield...

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* stor-layout.c (update_alignment_for_field): Use
	ADJUST_FIELD_ALIGN when computing the alignment for a zero-width
	bitfield when PCC_BITFIELD_TYPE_MATTERS.

From-SVN: r60419
This commit is contained in:
Mark Mitchell 2002-12-23 02:10:18 +00:00 • committed by Mark Mitchell
parent bea096ccbf
commit d0ff2db506
3 changed files with 32 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2002-12-22 Mark Mitchell <mark@codesourcery.com>
* stor-layout.c (update_alignment_for_field): Use
ADJUST_FIELD_ALIGN when computing the alignment for a zero-width
bitfield when PCC_BITFIELD_TYPE_MATTERS.
2002-12-22 Kazu Hirata <kazu@cs.umass.edu>
* genautomata.c: Fix comment typos.

5
gcc/stor-layout.c
View file

@ -722,7 +722,10 @@ update_alignment_for_field (rli, field, known_align)
if (! integer_zerop (DECL_SIZE (field)))
rli->record_align = MAX (rli->record_align, desired_align);
else if (! DECL_PACKED (field))
desired_align = TYPE_ALIGN (type);
{
desired_align = TYPE_ALIGN (type);
desired_align = ADJUST_FIELD_ALIGN (field, desired_align);
}
/* A named bit field of declared type `int'
forces the entire structure to have `int' alignment. */

22
gcc/testsuite/gcc.dg/i386-bitfield2.c Normal file
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@ -0,0 +1,22 @@
// Test for bitfield alignment in structs on IA-32
// { dg-do run { target i?86-*-* } }
// { dg-options "-O2" }
// { dg-options "-mno-align-double -mno-ms-bitfields" { target *-*-interix* } }
extern void abort (void);
extern void exit (int);
struct X {
char a;
long long : 0;
char b;
} x;
int main () {
if (&x.b - &x.a != 4)
abort ();
if (sizeof (x) != 5)
abort ();
exit (0);
}