On Fri, May 11, 2007 at 05:56:16PM +0530, Rahul wrote: > I have PLUS, MULT and following MAC pattern, in my target.md file. > (define_insn "" > [(set (match_operand:SI 0 "data_reg" "=f") > (plus:SI (mult:SI (match_operand:SI 1 "data_reg" "f") > (match_operand:SI 2 "data_reg" "f")) > (match_operand:SI 3 "data_reg" "0")))] > "" > "mac\\t%1, %2, %3" > [(set_attr "type" "arith") > (set_attr "length" "2")] > ) > > But for the following example > int a = 1; > int b = 2; > int c = 3; > c = c + a * b; > the MAC pattern is not getting recognized, instead it is still using > PLUS and MULT patterns.
See what is in the progname.c.*.combine file produced by -fdump-rtl-combine. Double check that your "data_reg" predicate is working. You will make your life easier by giving the insn pattern a name. The RTL dumps and in particular the -S -dp output will be easier to read. -- Rask Ingemann Lambertsen
