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arm.c (arm_new_rtx_costs): Use destination mode when handling a SET rtx.

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2014-01-10  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	* config/arm/arm.c (arm_new_rtx_costs): Use destination mode
	when handling a SET rtx.

From-SVN: r206521
This commit is contained in:
Kyrylo Tkachov 2014-01-10 11:48:37 +00:00 • committed by Kyrylo Tkachov
parent 2d17b99fe3
commit 5619162cdb
2 changed files with 10 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-01-10 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* config/arm/arm.c (arm_new_rtx_costs): Use destination mode
when handling a SET rtx.
2014-01-10 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* config/arm/arm-cores.def (cortex-a53): Specify FL_CRC32.

6
gcc/config/arm/arm.c
View file

@ -9092,6 +9092,9 @@ arm_new_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer_code,
{
case SET:
*cost = 0;
/* SET RTXs don't have a mode so we get it from the destination. */
mode = GET_MODE (SET_DEST (x));
if (REG_P (SET_SRC (x))
&& REG_P (SET_DEST (x)))
{
@ -9106,6 +9109,8 @@ arm_new_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer_code,
in 16 bits in Thumb mode. */
if (!speed_p && TARGET_THUMB && outer_code == COND_EXEC)
*cost >>= 1;
return true;
}
if (CONST_INT_P (SET_SRC (x)))
@ -9113,7 +9118,6 @@ arm_new_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer_code,
/* Handle CONST_INT here, since the value doesn't have a mode
and we would otherwise be unable to work out the true cost. */
*cost = rtx_cost (SET_DEST (x), SET, 0, speed_p);
mode = GET_MODE (SET_DEST (x));
outer_code = SET;
/* Slightly lower the cost of setting a core reg to a constant.
This helps break up chains and allows for better scheduling. */