This fixes the recent bootstrap failure of the mainline on SPARC/Solaris 8 by
stabilizing the sort of the ready list of the Haïfa scheduler in the presence
of debug insns.
Bootstrapped/regtested on SPARC/Solaris 8 and x86-64/Linux, pre-approved by
Bernd, applied on the mainline.
2012-02-23 Eric Botcazou <ebotca...@adacore.com>
PR bootstrap/52287
* haifa-sched.c (rank_for_schedule): Stabilize sort for debug insns.
--
Eric Botcazou
--
Eric Botcazou
Index: haifa-sched.c
===================================================================
--- haifa-sched.c (revision 184352)
+++ haifa-sched.c (working copy)
@@ -1647,8 +1647,10 @@ rank_for_schedule (const void *x, const
/* Schedule debug insns as early as possible. */
if (DEBUG_INSN_P (tmp) && !DEBUG_INSN_P (tmp2))
return -1;
- else if (DEBUG_INSN_P (tmp2))
+ else if (!DEBUG_INSN_P (tmp) && DEBUG_INSN_P (tmp2))
return 1;
+ else if (DEBUG_INSN_P (tmp) && DEBUG_INSN_P (tmp2))
+ return INSN_LUID (tmp) - INSN_LUID (tmp2);
}
/* The insn in a schedule group should be issued the first. */
