From: Claudiu Zissulescu <claziss@synopsys.com>
Date: Mon, 13 Mar 2017 12:56:22 +0000 (+0100)
Subject: [ARC] Code size modifications.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0e5172ebf287a857364a0e8be216e3231258bc49;p=gcc.git

[ARC] Code size modifications.

gcc/
2017-03-13  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (arc_init): Use multiplier whenever we have it.
	(arc_conditional_register_usage): Use a different allocation order
	when optimizing for size.
	* common/config/arc/arc-common.c (arc_option_optimization_table):
	Section anchors default on when optimizing for size.

From-SVN: r246091
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1c160a5b86c..b00a0cd6d95 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2017-03-13  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* config/arc/arc.c (arc_init): Use multiplier whenever we have it.
+	(arc_conditional_register_usage): Use a different allocation order
+	when optimizing for size.
+	* common/config/arc/arc-common.c (arc_option_optimization_table):
+	Section anchors default on when optimizing for size.
+
 2017-03-13  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* config/arc/arc.md (*tst_bitfield_tst): Fix pattern.
diff --git a/gcc/common/config/arc/arc-common.c b/gcc/common/config/arc/arc-common.c
index 88bfec6335b..82e0dd383c9 100644
--- a/gcc/common/config/arc/arc-common.c
+++ b/gcc/common/config/arc/arc-common.c
@@ -46,6 +46,7 @@ arc_option_init_struct (struct gcc_options *opts)
 #define OPT_LEVELS_3_PLUS_SPEED_ONLY OPT_LEVELS_3_PLUS
 static const struct default_options arc_option_optimization_table[] =
   {
+    { OPT_LEVELS_SIZE, OPT_fsection_anchors, NULL, 1 },
     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
     { OPT_LEVELS_ALL, OPT_mRcq, NULL, 1 },
     { OPT_LEVELS_ALL, OPT_mRcw, NULL, 1 },
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 5826c40ca7f..1116b2dbc25 100644
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -676,6 +676,12 @@ make_pass_arc_predicate_delay_insns (gcc::context *ctxt)
 static void
 arc_init (void)
 {
+  if (TARGET_V2)
+    {
+      /* I have the multiplier, then use it*/
+      if (TARGET_MPYW || TARGET_MULTI)
+	  arc_multcost = COSTS_N_INSNS (1);
+    }
   /* Note: arc_multcost is only used in rtx_cost if speed is true.  */
   if (arc_multcost < 0)
     switch (arc_tune)
@@ -1374,20 +1380,42 @@ arc_conditional_register_usage (void)
     }
   if (TARGET_Q_CLASS)
     {
-      reg_alloc_order[2] = 12;
-      reg_alloc_order[3] = 13;
-      reg_alloc_order[4] = 14;
-      reg_alloc_order[5] = 15;
-      reg_alloc_order[6] = 1;
-      reg_alloc_order[7] = 0;
-      reg_alloc_order[8] = 4;
-      reg_alloc_order[9] = 5;
-      reg_alloc_order[10] = 6;
-      reg_alloc_order[11] = 7;
-      reg_alloc_order[12] = 8;
-      reg_alloc_order[13] = 9;
-      reg_alloc_order[14] = 10;
-      reg_alloc_order[15] = 11;
+      if (optimize_size)
+	{
+	  reg_alloc_order[0] = 0;
+	  reg_alloc_order[1] = 1;
+	  reg_alloc_order[2] = 2;
+	  reg_alloc_order[3] = 3;
+	  reg_alloc_order[4] = 12;
+	  reg_alloc_order[5] = 13;
+	  reg_alloc_order[6] = 14;
+	  reg_alloc_order[7] = 15;
+	  reg_alloc_order[8] = 4;
+	  reg_alloc_order[9] = 5;
+	  reg_alloc_order[10] = 6;
+	  reg_alloc_order[11] = 7;
+	  reg_alloc_order[12] = 8;
+	  reg_alloc_order[13] = 9;
+	  reg_alloc_order[14] = 10;
+	  reg_alloc_order[15] = 11;
+	}
+      else
+	{
+	  reg_alloc_order[2] = 12;
+	  reg_alloc_order[3] = 13;
+	  reg_alloc_order[4] = 14;
+	  reg_alloc_order[5] = 15;
+	  reg_alloc_order[6] = 1;
+	  reg_alloc_order[7] = 0;
+	  reg_alloc_order[8] = 4;
+	  reg_alloc_order[9] = 5;
+	  reg_alloc_order[10] = 6;
+	  reg_alloc_order[11] = 7;
+	  reg_alloc_order[12] = 8;
+	  reg_alloc_order[13] = 9;
+	  reg_alloc_order[14] = 10;
+	  reg_alloc_order[15] = 11;
+	}
     }
   if (TARGET_SIMD_SET)
     {