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: r212738

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c938206a8c988de4a56e528b5681ca3bb82666e2..ee335f2176e482a75227ca33ccc16e85af596cc2 100644 (file)
--- 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  DJ Delorie  <dj@redhat.com>
 
        * config/rx/rx.c (rx_option_override): Fix alignment values.

diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index 7cafc8bb00bec932394ff3059ed9e378aab876f4..d2715213962d9a5cf70ea453963b5c5a75189a1e 100644 (file)
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -2750,7 +2750,8 @@ 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.