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* config/i386/i386-features.c

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(general_scalar_chain::compute_convert_gain):
	Correct cost for double-word shifts.
	(general_scalar_to_vector_candidate_p): Reject count operands
	greater or equal to mode bitsize.

From-SVN: r275055
This commit is contained in:
Uros Bizjak 2019-08-29 21:47:19 +02:00 committed by Uros Bizjak
parent d1041899c2
commit 2a3daf5b61
2 changed files with 19 additions and 4 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2019-08-29 Uroš Bizjak <ubizjak@gmail.com>
* config/i386/i386-features.c
(general_scalar_chain::compute_convert_gain):
Correct cost for double-word shifts.
(general_scalar_to_vector_candidate_p): Reject count operands
greater or equal to mode bitsize.
2019-08-29 Uroš Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (inline_secondary_memory_needed): Return true

15
gcc/config/i386/i386-features.c
View File

@ -549,11 +549,18 @@ general_scalar_chain::compute_convert_gain ()
|| GET_CODE (src) == ASHIFTRT
|| GET_CODE (src) == LSHIFTRT)
{
if (m == 2)
{
if (INTVAL (XEXP (src, 1)) >= 32)
igain += ix86_cost->add;
else
igain += ix86_cost->shift_const;
}
igain += ix86_cost->shift_const - ix86_cost->sse_op;
if (CONST_INT_P (XEXP (src, 0)))
igain -= vector_const_cost (XEXP (src, 0));
igain += m * ix86_cost->shift_const - ix86_cost->sse_op;
if (INTVAL (XEXP (src, 1)) >= 32)
igain -= COSTS_N_INSNS (1);
}
else if (GET_CODE (src) == PLUS
|| GET_CODE (src) == MINUS
@ -1359,7 +1366,7 @@ general_scalar_to_vector_candidate_p (rtx_insn *insn, enum machine_mode mode)
case ASHIFT:
case LSHIFTRT:
if (!CONST_INT_P (XEXP (src, 1))
|| !IN_RANGE (INTVAL (XEXP (src, 1)), 0, 63))
|| !IN_RANGE (INTVAL (XEXP (src, 1)), 0, GET_MODE_BITSIZE (mode)-1))
return false;
break;