From: Bernd Schmidt <bernds@codesourcery.com>
Date: Fri, 5 Aug 2011 18:22:36 +0000 (+0000)
Subject: re PR rtl-optimization/49900 (ICE in advance_target_bb, at sched-ebb.c:691)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2c331232e9ae426fc338928650355ecfab176290;p=gcc.git

re PR rtl-optimization/49900 (ICE in advance_target_bb, at sched-ebb.c:691)

	PR rtl-optimization/49900
	* sched-ebb.c (add_deps_for_risky_insns): Also add dependencies to
	ensure basic blocks stay in the same order.

From-SVN: r177475
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2e897ae8cd9..ba172aa6dce 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-08-05  Bernd Schmidt  <bernds@codesourcery.com>
+
+	PR rtl-optimization/49900
+	* sched-ebb.c (add_deps_for_risky_insns): Also add dependencies to
+	ensure basic blocks stay in the same order.
+
 2011-08-05  Aldy Hernandez  <aldyh@redhat.com>
 
 	* config/s390/s390.c (s390_expand_cs_hqi): Add new arguments to
diff --git a/gcc/sched-ebb.c b/gcc/sched-ebb.c
index 726c7c62511..ca0e1441275 100644
--- a/gcc/sched-ebb.c
+++ b/gcc/sched-ebb.c
@@ -397,6 +397,9 @@ add_deps_for_risky_insns (rtx head, rtx tail)
 	  bb = BLOCK_FOR_INSN (insn);
 	  bb->aux = last_block;
 	  last_block = bb;
+	  /* Ensure blocks stay in the same order.  */
+	  if (last_jump)
+	    add_dependence (insn, last_jump, REG_DEP_ANTI);
 	  last_jump = insn;
 	}
       else if (INSN_P (insn) && last_jump != NULL_RTX)