On Fri, Dec 06, 2013 at 10:59:37AM -0500, Vladimir Makarov wrote:
> It is still two different patterns. One for reload and one for LRA.
> Attribute enabled is mostly used to describe insn constraints for
> subtargets.
I meant something like:
(define_insn "*bswapdi2_64bit"
[(set (match_operand:DI 0 "reg_or_mem_operand" "=&r,Z,??&r,r")
(bswap:DI (match_operand:DI 1 "reg_or_mem_operand" "Z,r,r,r")))
(clobber (match_scratch:DI 2 "=&b,&b,&r,&r"))
(clobber (match_scratch:DI 3 "=&r,&r,&r,&r"))
(clobber (match_scratch:DI 4 "=&r,X,&r,&r"))]
"TARGET_POWERPC64 && !TARGET_LDBRX
&& (REG_P (operands[0]) || REG_P (operands[1]))
&& !(MEM_P (operands[0]) && MEM_VOLATILE_P (operands[0]))
&& !(MEM_P (operands[1]) && MEM_VOLATILE_P (operands[1]))"
"#"
[(set_attr "length" "16,12,36,36")
(set (attr "enabled")
(cond [(eq_attr "alternative" "0,1")
(const_int 1)
(and (eq_attr "alternative" "2")
(match_test "!rs6000_lra_flag"))
(const_int 1)
(and (eq_attr "alternative" "3")
(match_test "rs6000_lra_flag"))
(const_int 1)]
(const_int 0)]))])
That is just one pattern.
And of course
(define_attr "enabled" "" (const_int 1))
somewhere early, because rs6000 wasn't using enabled attribute yet.
Jakub
