[PATCH], V7, #2 of 7, Use PLI to load up 32-bit SImode constants

[Segher Boessenkool]

On Thu, Nov 14, 2019 at 05:42:43PM -0500, Michael Meissner wrote:
> -;; Split a load of a large constant into the appropriate two-insn
> -;; sequence.
> +;; Split a load of a large constant into the appropriate two-insn sequence.  On
> +;; systems that support PADDI (PLI), we can use PLI to load any 32-bit constant
> +;; in one instruction.
>  
>  (define_split
>    [(set (match_operand:SI 0 "gpc_reg_operand")
>  	(match_operand:SI 1 "const_int_operand"))]
>    "(unsigned HOST_WIDE_INT) (INTVAL (operands[1]) + 0x8000) >= 0x10000
> -   && (INTVAL (operands[1]) & 0xffff) != 0"
> +   && (INTVAL (operands[1]) & 0xffff) != 0 && !TARGET_PREFIXED_ADDR"
>    [(set (match_dup 0)
>  	(match_dup 2))
>     (set (match_dup 0)

Please use num_insns_constant, instead (and fix num_insns_constant_gpr
so it knows about SIGNED_34BIT).


Segher