re PR rtl-optimization/46614 (gcc.dg/vect/vect-strided-u8-i8-gap4.c FAILs with -fno-rename-registers -fsched2-use-superblocks)

	PR rtl-optimization/46614
	* sched-deps.c (NON_FLUSH_JUMP_KIND, NON_FLUSH_JUMP_P): Define.
	 (deps_analyze_insn): Mark JUMP_INSNs in
	last_pending_memory_flush that weren't added through
	flush_pending_lists with NON_FLUSH_JUMP_KIND.
	(sched_analyze_2, sched_analyze_insn): Check NON_FLUSH_JUMP_P
	on INSN_LIST instead of JUMP_P check on its operand.
	* sched-rgn.c (concat_INSN_LIST): Copy over REG_NOTE_KIND.

	* gcc.dg/pr46614.c: New test.

From-SVN: r167121

5 files changed, 93 insertions, 6 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f9b2d82..d6cd569 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2010-11-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/46614
+	* sched-deps.c (NON_FLUSH_JUMP_KIND, NON_FLUSH_JUMP_P): Define.
+	 (deps_analyze_insn): Mark JUMP_INSNs in
+	last_pending_memory_flush that weren't added through
+	flush_pending_lists with NON_FLUSH_JUMP_KIND.
+	(sched_analyze_2, sched_analyze_insn): Check NON_FLUSH_JUMP_P
+	on INSN_LIST instead of JUMP_P check on its operand.
+	* sched-rgn.c (concat_INSN_LIST): Copy over REG_NOTE_KIND.
+
 2010-11-24  Richard Guenther  <rguenther@suse.de>
 
 	* lto-streamer-in.c (input_gimple_stmt): Use types_compatible_p.
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index d2e3bb8..d1610af 100644
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -53,6 +53,12 @@ along with GCC; see the file COPYING3.  If not see
 #define CHECK (false)
 #endif
 
+/* In deps->last_pending_memory_flush marks JUMP_INSNs that weren't
+   added to the list because of flush_pending_lists, stands just
+   for itself and not for any other pending memory reads/writes.  */
+#define NON_FLUSH_JUMP_KIND REG_DEP_ANTI
+#define NON_FLUSH_JUMP_P(x) (REG_NOTE_KIND (x) == NON_FLUSH_JUMP_KIND)
+
 /* Holds current parameters for the dependency analyzer.  */
 struct sched_deps_info_def *sched_deps_info;
 
@@ -2484,7 +2490,7 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn)
 
 	    for (u = deps->last_pending_memory_flush; u; u = XEXP (u, 1))
 	      {
-		if (! JUMP_P (XEXP (u, 0)))
+		if (! NON_FLUSH_JUMP_P (u))
 		  add_dependence (insn, XEXP (u, 0), REG_DEP_ANTI);
 		else if (deps_may_trap_p (x))
 		  {
@@ -2796,8 +2802,7 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx insn)
 			   REG_DEP_ANTI);
 
       for (u = deps->last_pending_memory_flush; u; u = XEXP (u, 1))
-	if (! JUMP_P (XEXP (u, 0))
-	    || !sel_sched_p ())
+	if (! NON_FLUSH_JUMP_P (u) || !sel_sched_p ())
 	  add_dependence (insn, XEXP (u, 0), REG_DEP_ANTI);
 
       EXECUTE_IF_SET_IN_REG_SET (reg_pending_uses, 0, i, rsi)
@@ -3242,8 +3247,15 @@ deps_analyze_insn (struct deps_desc *deps, rtx insn)
           if (deps->pending_flush_length++ > MAX_PENDING_LIST_LENGTH)
             flush_pending_lists (deps, insn, true, true);
           else
-            deps->last_pending_memory_flush
-              = alloc_INSN_LIST (insn, deps->last_pending_memory_flush);
+	    {
+	      deps->last_pending_memory_flush
+		= alloc_INSN_LIST (insn, deps->last_pending_memory_flush);
+	      /* Signal to sched_analyze_insn that this jump stands
+		 just for its own, not any other pending memory
+		 reads/writes flush_pending_lists had to flush.  */
+	      PUT_REG_NOTE_KIND (deps->last_pending_memory_flush,
+				 NON_FLUSH_JUMP_KIND);
+	    }
         }
 
       sched_analyze_insn (deps, PATTERN (insn), insn);
diff --git a/gcc/sched-rgn.c b/gcc/sched-rgn.c
index 7e971e1..1297cf8 100644
--- a/gcc/sched-rgn.c
+++ b/gcc/sched-rgn.c
@@ -2574,7 +2574,10 @@ concat_INSN_LIST (rtx copy, rtx old)
 {
   rtx new_rtx = old;
   for (; copy ; copy = XEXP (copy, 1))
-    new_rtx = alloc_INSN_LIST (XEXP (copy, 0), new_rtx);
+    {
+      new_rtx = alloc_INSN_LIST (XEXP (copy, 0), new_rtx);
+      PUT_REG_NOTE_KIND (new_rtx, REG_NOTE_KIND (copy));
+    }
   return new_rtx;
 }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b4fe8ba..feae590 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-11-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/46614
+	* gcc.dg/pr46614.c: New test.
+
 2010-11-24  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/46638
diff --git a/gcc/testsuite/gcc.dg/pr46614.c b/gcc/testsuite/gcc.dg/pr46614.c
new file mode 100644
index 0000000..8e75780
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr46614.c
@@ -0,0 +1,56 @@
+/* PR rtl-optimization/46614 */
+/* { dg-do run } */
+/* { dg-options "-O -fno-rename-registers -fsched2-use-superblocks -fschedule-insns2 -funroll-loops" } */
+
+extern void abort (void);
+
+struct S
+{
+  unsigned char a;
+  unsigned char b;
+  unsigned int c;
+  unsigned int e;
+  unsigned char f;
+  unsigned int g;
+};
+
+void bar (struct S *x)
+{
+  int i;
+  struct S *p = x;
+  struct S r[16];
+  unsigned j;
+  for (i = 0; i < 16; i++)
+    {
+      r[i].c = p->b + p->c;
+      j = p->c + p->f;
+      r[i].a = j + p->b;
+      r[i].f = p->f + p->e;
+      r[i].g = p->b + p->c;
+    }
+  for (i = 0; i < 16; i++)
+    {
+      if (r[i].c != x[i].b + x[i].c
+	  || r[i].a != x[i].c + x[i].f + x[i].b
+	  || r[i].f != x[i].f + x[i].e
+	  || r[i].g != x[i].b + x[i].c)
+	abort ();
+    }
+  for (i = 0; i < 16; i++)
+    {
+      r[i].b = p->c;
+      if (r[i].b != x[i].c)
+	abort ();
+    }
+}
+
+int
+main ()
+{
+  int i;
+  struct S x[16];
+  for (i = 0; i < 16; i++)
+    x[i].b = x[i].c = x[i].e = x[i].f = 5;
+  bar (x);
+  return 0;
+}