[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 07f574f17b1f608314a783670dfe461dd737ca02..5eca05d37ab537b6b38d3fdcce447912ffbf3034 100644 (file)
--- 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 f5c882532044389daf85d121fb45aee8054015cb..736e6c8f025c11d8d675264c5e8cc42bc59bd9d3 100644 (file)
--- 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));