aarch64.c (aarch_macro_fusion_pair_p): Push the check for CC usage into AARCH64_FUSE_CMP_BRANCH.

2017-06-29  Naveen H.S  <Naveen.Hurugalawadi@cavium.com>

	* config/aarch64/aarch64.c (aarch_macro_fusion_pair_p): Push the
	check for CC usage into AARCH64_FUSE_CMP_BRANCH.
	* config/i386/i386.c (ix86_macro_fusion_pair_p): Push the check for
	CC usage from generic code to here.
	* sched-deps.c (sched_macro_fuse_insns): Move the condition for
	CC usage into the target macros.

From-SVN: r249827

gcc/ChangeLog

+2017-06-29  Naveen H.S  <Naveen.Hurugalawadi@cavium.com>
+
+	* config/aarch64/aarch64.c (aarch_macro_fusion_pair_p): Push the
+	check for CC usage into AARCH64_FUSE_CMP_BRANCH.
+	* config/i386/i386.c (ix86_macro_fusion_pair_p): Push the check for
+	CC usage from generic code to here.
+	* sched-deps.c (sched_macro_fuse_insns): Move the condition for
+	CC usage into the target macros. 
+
 2017-06-29  Maya Rashish  <coypu@sdf.org>
 
 	* config/netbsd.h (NETBSD_LIB_SPEC): Add -lc when creating shared

gcc/config/aarch64/aarch64.c

@@ -14304,13 +14304,23 @@ aarch_macro_fusion_pair_p (rtx_insn *prev, rtx_insn *curr)
     {
       enum attr_type prev_type = get_attr_type (prev);
 
-      /* FIXME: this misses some which is considered simple arthematic
-         instructions for ThunderX.  Simple shifts are missed here.  */
-      if (prev_type == TYPE_ALUS_SREG
-          || prev_type == TYPE_ALUS_IMM
-          || prev_type == TYPE_LOGICS_REG
-          || prev_type == TYPE_LOGICS_IMM)
-        return true;
+      unsigned int condreg1, condreg2;
+      rtx cc_reg_1;
+      aarch64_fixed_condition_code_regs (&condreg1, &condreg2);
+      cc_reg_1 = gen_rtx_REG (CCmode, condreg1);
+
+      if (reg_referenced_p (cc_reg_1, PATTERN (curr))
+	  && prev
+	  && modified_in_p (cc_reg_1, prev))
+	{
+	  /* FIXME: this misses some which is considered simple arthematic
+	     instructions for ThunderX.  Simple shifts are missed here.  */
+	  if (prev_type == TYPE_ALUS_SREG
+	      || prev_type == TYPE_ALUS_IMM
+	      || prev_type == TYPE_LOGICS_REG
+	      || prev_type == TYPE_LOGICS_IMM)
+	    return true;
+	}
     }
 
   return false;

gcc/config/i386/i386.c

@@ -30345,6 +30345,15 @@ ix86_macro_fusion_pair_p (rtx_insn *condgen, rtx_insn *condjmp)
   if (!any_condjump_p (condjmp))
     return false;
 
+  unsigned int condreg1, condreg2;
+  rtx cc_reg_1;
+  ix86_fixed_condition_code_regs (&condreg1, &condreg2);
+  cc_reg_1 = gen_rtx_REG (CCmode, condreg1);
+  if (!reg_referenced_p (cc_reg_1, PATTERN (condjmp))
+      || !condgen
+      || !modified_in_p (cc_reg_1, condgen))
+    return false;
+
   if (get_attr_type (condgen) != TYPE_TEST
       && get_attr_type (condgen) != TYPE_ICMP
       && get_attr_type (condgen) != TYPE_INCDEC

gcc/sched-deps.c

@@ -2834,34 +2834,30 @@ static void
 sched_macro_fuse_insns (rtx_insn *insn)
 {
   rtx_insn *prev;
-
+  prev = prev_nonnote_nondebug_insn (insn);
+  if (!prev)
+    return;
+ 
   if (any_condjump_p (insn))
     {
       unsigned int condreg1, condreg2;
       rtx cc_reg_1;
       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;
+      if (reg_referenced_p (cc_reg_1, PATTERN (insn))
+	  && modified_in_p (cc_reg_1, prev))
+	{
+	  if (targetm.sched.macro_fusion_pair_p (prev, insn))
+	    SCHED_GROUP_P (insn) = 1;
+	  return;
+	}
     }
-  else
-    {
-      rtx insn_set = single_set (insn);
-
-      prev = prev_nonnote_nondebug_insn (insn);
-      if (!prev
-          || !insn_set
-          || !single_set (prev))
-        return;
 
+  if (single_set (insn) && single_set (prev))
+    {
+      if (targetm.sched.macro_fusion_pair_p (prev, insn))
+	SCHED_GROUP_P (insn) = 1;
     }
-
-  if (targetm.sched.macro_fusion_pair_p (prev, insn))
-    SCHED_GROUP_P (insn) = 1;
-
 }
 
 /* Get the implicit reg pending clobbers for INSN and save them in TEMP.  */