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fishbaoz@hotmail.com wrote: > What is the exact meaning of "match_dup"? > > the following is extracted from "mips.md" > > (define_expand "movsicc" > [(set (match_dup 4) (match_operand 1 "comparison_operator" "")) > (set (match_operand:SI 0 "register_operand" "") > (if_then_else:SI (match_dup 5) > (match_operand:SI 2 "reg_or_0_operand" "") > (match_operand:SI 3 "reg_or_0_operand" "")))] > "mips_isa >= 4" > " > { > gen_conditional_move (operands); > DONE; > }") > > Now? > what is the meaning of "match_dup" in the machine description above? > what does it "duplicate"? Operand(4)? where is the original Operand(4)? > > Usually, this sort of thing refers to an operand that is manufactured in the define_expand. I don't see that going on here, though, so I'm at a loss. Anybody know? - ken ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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