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[AArch64] Properly handle simple arith+extend ops in rtx costs 

* config/aarch64/aarch64.c (aarch64_rtx_arith_op_extract_p):
	Handle simple SIGN_EXTEND or ZERO_EXTEND.
	(aarch64_rtx_costs): Properly strip extend or extract before
	passing down to rtx costs again.

From-SVN: r226309
This commit is contained in:
Kyrylo Tkachov 2015-07-28 11:00:07 +00:00 committed by Kyrylo Tkachov
parent 4b1cbcee3e
commit e47c403137
2 changed files with 16 additions and 2 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2015-07-28 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* config/aarch64/aarch64.c (aarch64_rtx_arith_op_extract_p):
Handle simple SIGN_EXTEND or ZERO_EXTEND.
(aarch64_rtx_costs): Properly strip extend or extract before
passing down to rtx costs again.
2015-07-28 Nick Clifton <nickc@redhat.com>
* config/rl78/rl78.c (rl78_addsi3_internal): New function.

11
gcc/config/aarch64/aarch64.c
View File

@ -5617,6 +5617,11 @@ aarch64_rtx_arith_op_extract_p (rtx x, machine_mode mode)
return true;
}
}
/* The simple case <ARITH>, XD, XN, XM, [us]xt.
No shift. */
else if (GET_CODE (x) == SIGN_EXTEND
|| GET_CODE (x) == ZERO_EXTEND)
return REG_P (XEXP (x, 0));
return false;
}
@ -6128,7 +6133,8 @@ cost_minus:
if (speed)
*cost += extra_cost->alu.extend_arith;
*cost += rtx_cost (XEXP (XEXP (op1, 0), 0), VOIDmode,
op1 = aarch64_strip_extend (op1);
*cost += rtx_cost (op1, VOIDmode,
(enum rtx_code) GET_CODE (op1), 0, speed);
return true;
}
@ -6206,7 +6212,8 @@ cost_plus:
if (speed)
*cost += extra_cost->alu.extend_arith;
*cost += rtx_cost (XEXP (XEXP (op0, 0), 0), VOIDmode,
op0 = aarch64_strip_extend (op0);
*cost += rtx_cost (op0, VOIDmode,
(enum rtx_code) GET_CODE (op0), 0, speed);
return true;
}