dart2js cps: Remove code after calls that cannot return.

tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart

Index: tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
diff --git a/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart b/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
index 1665195824e2c4e45aab088ebae96264c57fafdb..877b3714f376f5d65d815b282a1144b04a5ee2f2 100644
--- a/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
+++ b/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
@@ -11,7 +11,8 @@ import 'js_backend_cps_ir.dart';
 const List<TestEntry> tests = const [
   const TestEntry("main() { return true ? 42 : 'foo'; }"),
   const TestEntry("""
-foo() => foo();
+var x = 1;
+foo() => ++x > 10;

[Kevin Millikin (Google), 2015/09/15 13:50:10]

Yuck.

[asgerf, 2015/09/15 14:06:40]

I just don't want it to get constant folded or depend on Date or Math.

 main() {
   print(foo() ? "hello world" : "bad bad");
 }""","""
@@ -19,16 +20,17 @@ function() {
   P.print(V.foo() ? "hello world" : "bad bad");
 }"""),
   const TestEntry("""
-foo() { print('foo'); }
+var x = 1;
+foo() => ++x > 10;
 main() {
   print(foo() ? "hello world" : "bad bad");
 }""","""
 function() {
-  V.foo();
-  P.print("bad bad");
+  P.print(V.foo() ? "hello world" : "bad bad");
 }"""),
   const TestEntry("""
-get foo => foo;
+var x = 1;
+get foo => ++x > 10;
 main() {
   print(foo ? "hello world" : "bad bad");
 }""","""
@@ -36,19 +38,28 @@ function() {
   P.print(V.foo() ? "hello world" : "bad bad");
 }"""),
   const TestEntry("""
-get foo => foo;
+var x = 1;
+get foo => ++x > 10;
 main() { print(foo && foo); }
 """, """
 function() {
   P.print(V.foo() ? !!V.foo() : false);
 }"""),
   const TestEntry("""
-get foo => foo;
+var x = 1;
+get foo => ++x > 10;
 main() { print(foo || foo); }
 ""","""
 function() {
   P.print(V.foo() ? true : !!V.foo());
 }"""),
+const TestEntry("""
+get foo => foo;
+main() { print(foo || foo); }
+""","""
+function() {
+  V.foo();
+}"""),
 
 // Needs interceptor calling convention
 //const TestEntry("""