cmd/compile: remove _ssa print trigger

SSA is a real compiler now, don't trigger on function names.

Change-Id: Iaf6dd78248c1b6ca2630275bd59f7ea7b7576497
Reviewed-on: https://go-review.googlesource.com/20088Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/compile/internal/gc/ssa.go

@@ -81,7 +81,7 @@ func shouldssa(fn *Node) bool {
 // buildssa builds an SSA function.
 func buildssa(fn *Node) *ssa.Func {
 	name := fn.Func.Nname.Sym.Name
-	printssa := strings.HasSuffix(name, "_ssa") || strings.Contains(name, "_ssa.") || name == os.Getenv("GOSSAFUNC")
+	printssa := name == os.Getenv("GOSSAFUNC")
 	if printssa {
 		fmt.Println("generating SSA for", name)
 		dumpslice("buildssa-enter", fn.Func.Enter.Slice())