From: Richard Biener <rguenther@suse.de>
Date: Thu, 17 Jul 2014 07:49:44 +0000 (+0000)
Subject: re PR rtl-optimization/61801 (sched2 miscompiles syscall sequence with -g)
X-Git-Tag: releases/gcc-4.8.4~355
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3fca794f3d84b4f527a8e4e86ce60a6752105b20;p=thirdparty%2Fgcc.git

re PR rtl-optimization/61801 (sched2 miscompiles syscall sequence with -g)

2014-07-17  Richard Biener  <rguenther@suse.de>

	PR rtl-optimization/61801
	* sched-deps.c (sched_analyze_2): For ASM_OPERANDS and
	ASM_INPUT don't set reg_pending_barrier if it appears in a
	debug-insn.

From-SVN: r212740
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e4f85759ffe6..59addffc3c95 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2014-07-17  Richard Biener  <rguenther@suse.de>
+
+	PR rtl-optimization/61801
+	* sched-deps.c (sched_analyze_2): For ASM_OPERANDS and
+	ASM_INPUT don't set reg_pending_barrier if it appears in a
+	debug-insn.
+
 2014-07-16  Jakub Jelinek  <jakub@redhat.com>
 
 	* omp-low.c (create_omp_child_function): Don't set DECL_NAMELESS
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index 07857f2d6bff..4ac2542a3af8 100644
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -2744,7 +2744,8 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn)
 	   Consider for instance a volatile asm that changes the fpu rounding
 	   mode.  An insn should not be moved across this even if it only uses
 	   pseudo-regs because it might give an incorrectly rounded result.  */
-	if (code != ASM_OPERANDS || MEM_VOLATILE_P (x))
+	if ((code != ASM_OPERANDS || MEM_VOLATILE_P (x))
+	    && !DEBUG_INSN_P (insn))
 	  reg_pending_barrier = TRUE_BARRIER;
 
 	/* For all ASM_OPERANDS, we must traverse the vector of input operands.