Commit 2a3b43b6 by Jakub Jelinek Committed by Jakub Jelinek

combine.c (distribute_notes): Avoid adding REG_LABEL notes to JUMP_INSNs with JUMP_LABEL.

	* combine.c (distribute_notes): Avoid adding REG_LABEL notes
	to JUMP_INSNs with JUMP_LABEL.

	* gcc.c-torture/execute/20011219-1.c: New test.

From-SVN: r48198
parent c12b6f2a
2001-12-20 Jakub Jelinek <jakub@redhat.com>
* combine.c (distribute_notes): Avoid adding REG_LABEL notes
to JUMP_INSNs with JUMP_LABEL.
2001-12-19 Aldy Hernandez <aldyh@redhat.com> 2001-12-19 Aldy Hernandez <aldyh@redhat.com>
* doc/install.texi: Add documentation for --enable-altivec. * doc/install.texi: Add documentation for --enable-altivec.
......
...@@ -12129,6 +12129,25 @@ distribute_notes (notes, from_insn, i3, i2, elim_i2, elim_i1) ...@@ -12129,6 +12129,25 @@ distribute_notes (notes, from_insn, i3, i2, elim_i2, elim_i1)
else else
place = i2; place = i2;
} }
/* Don't attach REG_LABEL note to a JUMP_INSN which has
JUMP_LABEL already. Instead, decrement LABEL_NUSES. */
if (place && GET_CODE (place) == JUMP_INSN && JUMP_LABEL (place))
{
if (JUMP_LABEL (place) != XEXP (note, 0))
abort ();
if (GET_CODE (JUMP_LABEL (place)) == CODE_LABEL)
LABEL_NUSES (JUMP_LABEL (place))--;
place = 0;
}
if (place2 && GET_CODE (place2) == JUMP_INSN && JUMP_LABEL (place2))
{
if (JUMP_LABEL (place2) != XEXP (note, 0))
abort ();
if (GET_CODE (JUMP_LABEL (place2)) == CODE_LABEL)
LABEL_NUSES (JUMP_LABEL (place2))--;
place2 = 0;
}
break; break;
case REG_NONNEG: case REG_NONNEG:
......
2001-12-20 Jakub Jelinek <jakub@redhat.com>
* gcc.c-torture/execute/20011219-1.c: New test.
2001-12-19 David Billinghurst <David.Billinghurst@riotinto.com> 2001-12-19 David Billinghurst <David.Billinghurst@riotinto.com>
* gcc.dg/special/ecos.exp: wkali-1.c unsupported if * gcc.dg/special/ecos.exp: wkali-1.c unsupported if
......
/* This testcase failed on IA-32 at -O and above, because combine attached
a REG_LABEL note to jump instruction already using JUMP_LABEL. */
extern void abort (void);
extern void exit (int);
enum X { A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q };
void
bar (const char *x, int y, const char *z)
{
}
long
foo (enum X x, const void *y)
{
long a;
switch (x)
{
case K:
a = *(long *)y;
break;
case L:
a = *(long *)y;
break;
case M:
a = *(long *)y;
break;
case N:
a = *(long *)y;
break;
case O:
a = *(long *)y;
break;
default:
bar ("foo", 1, "bar");
}
return a;
}
int
main ()
{
int i = 24;
if (foo (N, &i) != 24)
abort ();
exit (0);
}
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