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arm.c (arm_rtx_costs_1): Use power_of_two_operand where appropriate.

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* config/arm/arm.c (arm_rtx_costs_1): Use power_of_two_operand
	where appropriate.

From-SVN: r146602
This commit is contained in:
Kazu Hirata 2009-04-22 16:52:17 +00:00 committed by Kazu Hirata
parent d5df9a20db
commit 4c7c486a4e
2 changed files with 11 additions and 18 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2009-04-22 Kazu Hirata <kazu@codesourcery.com>
* config/arm/arm.c (arm_rtx_costs_1): Use power_of_two_operand
where appropriate.
2009-04-22 Kazu Hirata <kazu@codesourcery.com>
* config/arm/arm.c (arm_size_rtx_costs): Treat a PLUS with a shift

24
gcc/config/arm/arm.c
View File

@ -5141,9 +5141,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed)
/* A shift as a part of RSB costs no more than RSB itself. */
if (GET_CODE (XEXP (x, 0)) == MULT
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& ((INTVAL (XEXP (XEXP (x, 0), 1))
& (INTVAL (XEXP (XEXP (x, 0), 1)) - 1)) == 0))
&& power_of_two_operand (XEXP (XEXP (x, 0), 1), SImode))
{
*total += rtx_cost (XEXP (XEXP (x, 0), 0), code, speed);
*total += rtx_cost (XEXP (x, 1), code, speed);
@ -5151,9 +5149,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed)
}
if (subcode == MULT
&& GET_CODE (XEXP (XEXP (x, 1), 1)) == CONST_INT
&& ((INTVAL (XEXP (XEXP (x, 1), 1)) &
(INTVAL (XEXP (XEXP (x, 1), 1)) - 1)) == 0))
&& power_of_two_operand (XEXP (XEXP (x, 1), 1), SImode))
{
*total += rtx_cost (XEXP (x, 0), code, speed);
*total += rtx_cost (XEXP (XEXP (x, 1), 0), subcode, speed);
@ -5189,9 +5185,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed)
multiplication by a power of two, so that we fall down into
the code below. */
if (GET_CODE (XEXP (x, 0)) == MULT
&& ! (GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& ((INTVAL (XEXP (XEXP (x, 0), 1)) &
(INTVAL (XEXP (XEXP (x, 0), 1)) - 1)) == 0)))
&& !power_of_two_operand (XEXP (XEXP (x, 0), 1), SImode))
{
/* The cost comes from the cost of the multiply. */
return false;
@ -5274,9 +5268,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed)
}
if (subcode == MULT
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& ((INTVAL (XEXP (XEXP (x, 0), 1)) &
(INTVAL (XEXP (XEXP (x, 0), 1)) - 1)) == 0))
&& power_of_two_operand (XEXP (XEXP (x, 0), 1), SImode))
{
*total += rtx_cost (XEXP (x, 1), code, speed);
*total += rtx_cost (XEXP (XEXP (x, 0), 0), subcode, speed);
@ -5333,9 +5325,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed)
|| subcode == LSHIFTRT
|| subcode == ROTATE || subcode == ROTATERT
|| (subcode == MULT
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& ((INTVAL (XEXP (XEXP (x, 0), 1)) &
(INTVAL (XEXP (XEXP (x, 0), 1)) - 1)) == 0)))
&& power_of_two_operand (XEXP (XEXP (x, 0), 1), SImode)))
{
*total += rtx_cost (XEXP (XEXP (x, 0), 0), subcode, speed);
/* Register shifts cost an extra cycle. */
@ -5443,9 +5433,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed)
}
if (subcode == MULT
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& ((INTVAL (XEXP (XEXP (x, 0), 1)) &
(INTVAL (XEXP (XEXP (x, 0), 1)) - 1)) == 0))
&& power_of_two_operand (XEXP (XEXP (x, 0), 1), SImode))
{
*total += rtx_cost (XEXP (x, 1), code, speed);
*total += rtx_cost (XEXP (XEXP (x, 0), 0), subcode, speed);