From 0360f70d36156a2a537e985f09fbf675c16bda2a Mon Sep 17 00:00:00 2001
From: Bernd Schmidt <bernds@codesourcery.com>
Date: Wed, 4 May 2011 20:24:15 +0000
Subject: [PATCH] re PR rtl-optimization/47612 (RTL crash when cc0 setter moved
away from cc0 user)
PR rtl-optimization/47612
* df-problems.c (can_move_insns_across): Don't pick a cc0 setter
as the last insn of the sequence to be moved.
From-SVN: r173393
---
gcc/ChangeLog | 6 ++++++
gcc/df-problems.c | 11 +++++++++--
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 00d84974ca30..4ff3175c0791 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-04 Bernd Schmidt <bernds@codesourcery.com>
+
+ PR rtl-optimization/47612
+ * df-problems.c (can_move_insns_across): Don't pick a cc0 setter
+ as the last insn of the sequence to be moved.
+
2011-05-04 Tobias Burnus <burnus@net-b.de>
PR fortran/48864
diff --git a/gcc/df-problems.c b/gcc/df-problems.c
index 0f398ba3aa4b..e5b88e3d2dcf 100644
--- a/gcc/df-problems.c
+++ b/gcc/df-problems.c
@@ -4001,7 +4001,10 @@ can_move_insns_across (rtx from, rtx to, rtx across_from, rtx across_to,
if (bitmap_intersect_p (merge_set, test_use)
|| bitmap_intersect_p (merge_use, test_set))
break;
- max_to = insn;
+#ifdef HAVE_cc0
+ if (!sets_cc0_p (insn))
+#endif
+ max_to = insn;
}
next = NEXT_INSN (insn);
if (insn == to)
@@ -4038,7 +4041,11 @@ can_move_insns_across (rtx from, rtx to, rtx across_from, rtx across_to,
{
if (NONDEBUG_INSN_P (insn))
{
- if (!bitmap_intersect_p (test_set, local_merge_live))
+ if (!bitmap_intersect_p (test_set, local_merge_live)
+#ifdef HAVE_cc0
+ && !sets_cc0_p (insn)
+#endif
+ )
{
max_to = insn;
break;
--
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