re PR rtl-optimization/59020 (internal compiler error: in…

re PR rtl-optimization/59020 (internal compiler error: in maybe_add_or_update_dep_1, at sched-deps.c:933)

2013-12-03  Wei Mi  <wmi@google.com>

	PR rtl-optimization/59020
	* sched-deps.c (try_group_insn): Move it from haifa-sched.c to here.
	(sched_analyze_insn): Call try_group_insn.
	(sched_analyze): Cleanup SCHED_GROUP_P before start the analysis.
	* haifa-sched.c (try_group_insn): Moved to sched-deps.c.
	(group_insns_for_macro_fusion): Removed.
	(sched_init): Remove calling group_insns_for_macro_fusion.

2013-12-03  Wei Mi  <wmi@google.com>

	PR rtl-optimization/59020
	* testsuite/gcc.dg/pr59020.c: New.
	* testsuite/gcc.dg/macro-fusion-1.c: New.
	* testsuite/gcc.dg/macro-fusion-2.c: New.

From-SVN: r205644

gcc/ChangeLog

+2013-12-03  Wei Mi  <wmi@google.com>
+
+	PR rtl-optimization/59020
+	* sched-deps.c (try_group_insn): Move it from haifa-sched.c to here.
+	(sched_analyze_insn): Call try_group_insn.
+	(sched_analyze): Cleanup SCHED_GROUP_P before start the analysis.
+	* haifa-sched.c (try_group_insn): Moved to sched-deps.c.
+	(group_insns_for_macro_fusion): Removed.
+	(sched_init): Remove calling group_insns_for_macro_fusion.
+
 2013-12-03  Peter Bergner  <bergner@vnet.ibm.com>
 
 	* config/rs6000/htmintrin.h (_TEXASR_INSTRUCTION_FETCH_CONFLICT): Fix

gcc/haifa-sched.c

@@ -6553,50 +6553,6 @@ setup_sched_dump (void)
 		? stderr : dump_file);
 }
 
-/* Try to group comparison and the following conditional jump INSN if
-   they're already adjacent. This is to prevent scheduler from scheduling
-   them apart.  */
-
-static void
-try_group_insn (rtx insn)
-{
-  unsigned int condreg1, condreg2;
-  rtx cc_reg_1;
-  rtx prev;
-
-  if (!any_condjump_p (insn))
-    return;
-
-  targetm.fixed_condition_code_regs (&condreg1, &condreg2);
-  cc_reg_1 = gen_rtx_REG (CCmode, condreg1);
-  prev = prev_nonnote_nondebug_insn (insn);
-  if (!reg_referenced_p (cc_reg_1, PATTERN (insn))
-      || !prev
-      || !modified_in_p (cc_reg_1, prev))
-    return;
-
-  /* Different microarchitectures support macro fusions for different
-     combinations of insn pairs.  */
-  if (!targetm.sched.macro_fusion_pair_p
-      || !targetm.sched.macro_fusion_pair_p (prev, insn))
-    return;
-
-  SCHED_GROUP_P (insn) = 1;
-}
-
-/* If the last cond jump and the cond register defining insn are consecutive
-   before scheduling, we want them to be in a schedule group. This is good
-   for performance on microarchitectures supporting macro-fusion.  */
-
-static void
-group_insns_for_macro_fusion ()
-{
-  basic_block bb;
-
-  FOR_EACH_BB (bb)
-    try_group_insn (BB_END (bb));
-}
-
 /* Initialize some global state for the scheduler.  This function works
    with the common data shared between all the schedulers.  It is called
    from the scheduler specific initialization routine.  */
@@ -6725,11 +6681,6 @@ sched_init (void)
     }
 
   curr_state = xmalloc (dfa_state_size);
-
-  /* Group compare and branch insns for macro-fusion.  */
-  if (targetm.sched.macro_fusion_p
-      && targetm.sched.macro_fusion_p ())
-    group_insns_for_macro_fusion ();
 }
 
 static void haifa_init_only_bb (basic_block, basic_block);

gcc/sched-deps.c

@@ -2820,6 +2820,37 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn)
     sched_deps_info->finish_rhs ();
 }
 
+/* Try to group comparison and the following conditional jump INSN if
+   they're already adjacent. This is to prevent scheduler from scheduling
+   them apart.  */
+
+static void
+try_group_insn (rtx insn)
+{
+  unsigned int condreg1, condreg2;
+  rtx cc_reg_1;
+  rtx prev;
+
+  if (!any_condjump_p (insn))
+    return;
+
+  targetm.fixed_condition_code_regs (&condreg1, &condreg2);
+  cc_reg_1 = gen_rtx_REG (CCmode, condreg1);
+  prev = prev_nonnote_nondebug_insn (insn);
+  if (!reg_referenced_p (cc_reg_1, PATTERN (insn))
+      || !prev
+      || !modified_in_p (cc_reg_1, prev))
+    return;
+
+  /* Different microarchitectures support macro fusions for different
+     combinations of insn pairs.  */
+  if (!targetm.sched.macro_fusion_pair_p
+      || !targetm.sched.macro_fusion_pair_p (prev, insn))
+    return;
+
+  SCHED_GROUP_P (insn) = 1;
+}
+
 /* Analyze an INSN with pattern X to find all dependencies.  */
 static void
 sched_analyze_insn (struct deps_desc *deps, rtx x, rtx insn)
@@ -2843,6 +2874,11 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx insn)
   can_start_lhs_rhs_p = (NONJUMP_INSN_P (insn)
 			 && code == SET);
 
+  /* Group compare and branch insns for macro-fusion.  */
+  if (targetm.sched.macro_fusion_p
+      && targetm.sched.macro_fusion_p ())
+    try_group_insn (insn);
+
   if (may_trap_p (x))
     /* Avoid moving trapping instructions across function calls that might
        not always return.  */
@@ -3733,6 +3769,10 @@ sched_analyze (struct deps_desc *deps, rtx head, rtx tail)
 	{
 	  /* And initialize deps_lists.  */
 	  sd_init_insn (insn);
+	  /* Clean up SCHED_GROUP_P which may be set by last
+	     scheduler pass.  */
+	  if (SCHED_GROUP_P (insn))
+	    SCHED_GROUP_P (insn) = 0;
 	}
 
       deps_analyze_insn (deps, insn);

gcc/testsuite/ChangeLog

+2013-12-03  Wei Mi  <wmi@google.com>
+
+	PR rtl-optimization/59020
+	* testsuite/gcc.dg/pr59020.c: New.
+	* testsuite/gcc.dg/macro-fusion-1.c: New.
+	* testsuite/gcc.dg/macro-fusion-2.c: New.
+
 2013-12-03  Yury Gribov  <y.gribov@samsung.com>
 
 	PR sanitizer/59063

gcc/testsuite/gcc.dg/macro-fusion-1.c

+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -mtune=corei7 -fdump-rtl-sched2" } */
+/* { dg-final { scan-rtl-dump-not "compare.*insn.*jump_insn.*jump_insn" "sched2" } } */
+
+int a[100];
+
+double bar (double sum)
+{
+  int i;
+  for (i = 0; i < 1000000; i++)
+   sum += (0.5 + (a[i%100] - 128));
+  return sum;
+}

gcc/testsuite/gcc.dg/macro-fusion-2.c

+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -mtune=corei7-avx -fdump-rtl-sched2" } */
+/* { dg-final { scan-rtl-dump-not "compare.*insn.*jump_insn.*jump_insn" "sched2" } } */
+
+int a[100];
+
+double bar (double sum)
+{
+  int i = 100000;
+  while (i != 0)
+    {
+      sum += (0.5 + (a[i%100] - 128));
+      i--;
+    }
+  return sum;
+}

gcc/testsuite/gcc.dg/pr59020.c

+/* PR rtl-optimization/59020 */
+
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fmodulo-sched -fno-inline -march=corei7" } */
+
+int a, b, d;
+unsigned c;
+
+void f()
+{
+  unsigned q;
+  for(; a; a++)
+    if(((c %= d && 1) ? : 1) & 1)
+      for(; b; q++);
+}