bug: ssa select case call expr order

[visualfc]

$GOROOT/test/chan/select5

bug: golang.org/x/tools/go/ssa build order fp, fc

package main

var c = make(chan int, 1)
var nilch chan int
var n = 1
var x int
var i interface{}
var dummy = make(chan int)
var m = make(map[int]int)
var order = 0

// check order of operations by ensuring that
// successive calls to checkorder have increasing o values.
func checkorder(o int) {
	if o <= order {
		println("invalid order", o, "after", order)
		panic("order")
	}
	order = o
}

func fc(c chan int, o int) chan int {
	checkorder(o)
	return c
}

func fp(p *int, o int) *int {
	checkorder(o)
	return p
}

func init() {
	order = 0
	c <- n
	select {
	case *fp(&x, 100) = <-fc(c, 1):
	}
	if x != n {
		die(x)
	}
	n++
}

func die(x int) {
	println("have", x, "want", n)
	panic("chan")
}

func main() {
}

func init#1():
0:                                                                entry P:0 S:2
	*order = 0:int
	t0 = *c                                                        chan int
	t1 = *n                                                             int
	send t0 <- t1
	t2 = fp(x, 100:int)                                                *int
	t3 = *c                                                        chan int
	t4 = fc(t3, 1:int)                                             chan int
	t5 = <-t4                                                           int
	*t2 = t5
	t6 = *x                                                             int
	t7 = *n                                                             int
	t8 = t6 != t7                                                      bool
	if t8 goto 1 else 2
1:                                                              if.then P:1 S:1
	t9 = *x                                                             int
	t10 = die(t9)                                                        ()
	jump 2
2:                                                              if.done P:2 S:0
	t11 = *n                                                            int
	t12 = t11 + 1:int                                                   int
	*n = t12
	return