From: Jakub Jelinek <jakub@redhat.com>
Date: Sat, 20 Nov 2010 12:14:48 +0000 (+0100)
Subject: re PR debug/46561 (-fcompare-debug failure (length) with -O2 -ftree-vectorize -ftree... 
X-Git-Tag: releases/gcc-4.6.0~2452
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4942af9b83b8040720ec09a48a0a8f4d0b08bde3;p=thirdparty%2Fgcc.git

re PR debug/46561 (-fcompare-debug failure (length) with -O2 -ftree-vectorize -ftree-parallelize-loops)

	PR debug/46561
	* tree-parloops.c (try_create_redunction_list): Ignore debug stmts
	when looking for immediate uses.

	* gcc.dg/autopar/pr46561.c: New test.

From-SVN: r166975
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b5dbd5b19d94..758f7ae9d850 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2010-11-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/46561
+	* tree-parloops.c (try_create_redunction_list): Ignore debug stmts
+	when looking for immediate uses.
+
 	PR tree-optimization/45830
 	* stmt.c (expand_switch_using_bit_tests_p): New function.
 	(expand_case): Use it.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9a002528bb19..6d32aa633152 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2010-11-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/46561
+	* gcc.dg/autopar/pr46561.c: New test.
+
 	PR c++/46538
 	* g++.dg/other/error34.C: New test.
 
diff --git a/gcc/testsuite/gcc.dg/autopar/pr46561.c b/gcc/testsuite/gcc.dg/autopar/pr46561.c
new file mode 100644
index 000000000000..a9499f340848
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/autopar/pr46561.c
@@ -0,0 +1,17 @@
+/* PR debug/46561 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize -ftree-parallelize-loops=2 -fcompare-debug" } */
+
+extern void abort (void);
+
+void foo (char *c)
+{
+  int i;
+  unsigned x = 0;
+  {
+    for (i = 0; i < 64; i += 4)
+	x = x | *((unsigned *) (&c[i]));
+    if (x)
+      abort ();
+  }
+}
diff --git a/gcc/tree-parloops.c b/gcc/tree-parloops.c
index a634b249a613..a0d16883398b 100644
--- a/gcc/tree-parloops.c
+++ b/gcc/tree-parloops.c
@@ -1870,7 +1870,8 @@ try_create_reduction_list (loop_p loop, htab_t reduction_list)
 	  reduc_phi = NULL;
 	  FOR_EACH_IMM_USE_FAST (use_p, imm_iter, val)
 	    {
-	      if (flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p))))
+	      if (!gimple_debug_bind_p (USE_STMT (use_p))
+		  && flow_bb_inside_loop_p (loop, gimple_bb (USE_STMT (use_p))))
 		{
 		  reduc_phi = USE_STMT (use_p);
 		  break;