compilers/tac/test15.tac

--C COMPILER
int y = 5;

int fun1(){
	int x = 11;
	return x;
}


int main() { 
	int x = 4;
	return y * x * fun1();
}
parse finished
~
  ~
    ~
      int
      =
        y
        5
    D
      d
        int
        F
          fun1
      ;
        ~
          int
          =
            x
            11
        return
          x
  D
    d
      int
      F
        main
    ;
      ~
        int
        =
          x
          4
      return
        *
          *
            y
            x
          apply
            fun1
y := 5
func fun1
x := 11
ret x
end fun1

func main
x := 4
$t1 := y * x
call fun1, $t2
$t0 := $t1 * $t2
ret $t0
end main

=====
li $a0, 68
li $v0, 9
syscall
or $fp, $0, $v0
la $t0, main
sw $t0, 0($fp)
sw $0, 4($fp)
jal main
j done
#y := 5
li $8, 5
or $16, $0, $8
#func fun1
fun1:
li $a0, 68
li $v0, 9
syscall
sw $fp, 4($v0)
sw $16, 8($fp)
or $fp, $0, $v0
la $t0, fun1
sw $t0, 0($fp)
sw $ra, 64($fp)
#x := 11
li $9, 11
or $16, $0, $9
#ret x
or $v1, $0, $16
jr $31
#end fun1

#func main
main:
li $a0, 68
li $v0, 9
syscall
sw $fp, 4($v0)
sw $16, 8($fp)
or $fp, $0, $v0
la $t0, main
sw $t0, 0($fp)
sw $ra, 64($fp)
#x := 4
li $10, 4
or $16, $0, $10
#$t1 := y * x
mult $17, $16
mflo $11
#call fun1, $t2
jal fun1
lw $fp, 4($fp)
lw $ra, 64($fp)
lw $16, 8($fp)
lw $17, 12($fp)
or $12, $0, $v1
#$t0 := $t1 * $t2
mult $11, $12
mflo $13
#ret $t0
or $v1, $0, $13
jr $31
#end main

done:
ori $v0, $0, 10
syscall