cmd/compile: allow inlining of ORANGE

Updates #14768

Change-Id: I33831f616eae5eeb099033e2b9cf90fa70d6ca86
Reviewed-on: https://go-review.googlesource.com/c/go/+/356869
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Dan Scales <danscales@google.com>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>

test/fixedbugs/issue49100b.go

@@ -0,0 +1,27 @@
+// run
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+func r(j int) {
+loop:
+	for i, c := range "goclang" {
+		if i == 2 {
+			continue loop
+		}
+		println(string(c))
+	}
+}
+
+func main() {
+loop:
+	for j := 0; j < 4; j++ {
+		r(j)
+		if j == 0 {
+			break loop
+		}
+	}
+}