From: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date: Tue, 10 Nov 2015 17:29:46 +0000 (+0000)
Subject: [ARM] Fix costing of vmul+vcvt combine pattern
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6a9ee02f7afa32a1bded5d4d0644ac1b02064148;p=gcc.git

[ARM] Fix costing of vmul+vcvt combine pattern

	* config/arm/arm.c (arm_new_rtx_costs, FIX case): Handle
	combine_vcvtf2i pattern.

From-SVN: r230116
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 07f574f17b1..5eca05d37ab 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-10  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* config/arm/arm.c (arm_new_rtx_costs, FIX case): Handle
+	combine_vcvtf2i pattern.
+
 2015-11-10  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/arm/arm.c (neon_valid_immediate): Remove integer
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index f5c88253204..736e6c8f025 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -11049,6 +11049,23 @@ arm_new_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer_code,
     case UNSIGNED_FIX:
       if (TARGET_HARD_FLOAT)
 	{
+	  /* The *combine_vcvtf2i reduces a vmul+vcvt into
+	     a vcvt fixed-point conversion.  */
+	  if (code == FIX && mode == SImode
+	      && GET_CODE (XEXP (x, 0)) == FIX
+	      && GET_MODE (XEXP (x, 0)) == SFmode
+	      && GET_CODE (XEXP (XEXP (x, 0), 0)) == MULT
+	      && vfp3_const_double_for_bits (XEXP (XEXP (XEXP (x, 0), 0), 1))
+		 > 0)
+	    {
+	      if (speed_p)
+		*cost += extra_cost->fp[0].toint;
+
+	      *cost += rtx_cost (XEXP (XEXP (XEXP (x, 0), 0), 0), mode,
+				 code, 0, speed_p);
+	      return true;
+	    }
+
 	  if (GET_MODE_CLASS (mode) == MODE_INT)
 	    {
 	      mode = GET_MODE (XEXP (x, 0));