+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>
* doc/install.texi: Add documentation for --enable-altivec.
else
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;
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>
* gcc.dg/special/ecos.exp: wkali-1.c unsupported if
--- /dev/null
+/* 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);
+}