Implement simple switch statements as nested if/else.

tests/language/language_dart2js.status

Index: tests/language/language_dart2js.status
diff --git a/tests/language/language_dart2js.status b/tests/language/language_dart2js.status
index 438060de07c4c8b206f5c06011dce736128efaf9..0ed706aa21704be6065d2820fa11336100c8f09d 100644
--- a/tests/language/language_dart2js.status
+++ b/tests/language/language_dart2js.status
@@ -245,7 +245,6 @@ generic_field_mixin4_test: Crash # Issue 18651
 generic_field_mixin5_test: Crash # Issue 18651
 
 [ $compiler == dart2js && $cps_ir ]
-aborting_switch_case_test: Crash # (switch (42){case 42:foo();foo();break;}): Unhandled node
 async_and_or_test: Crash # (test()async{await test1();await test2();}): cannot handle async/sync*/async* functions
 async_await_catch_regression_test: Crash # (test()async{var exc...  cannot handle async/sync*/async* functions
 async_await_syntax_test/a01a: Crash # (a01a()async=>null;): cannot handle async/sync*/async* functions
@@ -363,16 +362,12 @@ closure_in_constructor_test: Crash # Invalid argument(s)
 closure_self_reference_test: Crash # (try {return inner(value-1);}finally {counter++ ;}): try/finally
 closure_type_variables_test: Crash # Invalid argument(s)
 const_nested_test: Crash # Invalid argument(s)
-const_switch2_test/none: Crash # (switch (a){case 1:print("OK");}): Unhandled node
-const_switch_test/01: Crash # (switch (c){case con...  Unhandled node
 const_switch_test/02: Crash # (switch (c){case con...  Unhandled node
-const_switch_test/03: Crash # (switch (c){case con...  Unhandled node
 const_switch_test/04: Crash # (switch (c){case con...  Unhandled node
 constructor11_test: Crash # Invalid argument(s)
 constructor12_test: RuntimeError # Please triage this failure.
 constructor5_test: Crash # The null object does not have a getter 'namedArguments'.
 constructor_with_mixin_test: Crash # Internal Error: No default constructor available.
-continue_test: Crash # (switch (0){case 0:i=22;continue;default:i=25;break;}): Unhandled node
 crash_12118_test: Crash # Invalid argument(s)
 crash_6725_test/01: Crash # The null object does not have a getter '_element'.
 custom_await_stack_trace_test: Crash # (main()async{try {va...  cannot handle async/sync*/async* functions
@@ -416,7 +411,6 @@ deferred_shared_and_unshared_classes_test: RuntimeError # U.loadLibrary is not a
 deferred_static_seperate_test: RuntimeError # L.loadLibrary is not a function
 deopt_inlined_function_lazy_test: Crash # (try {return x+12342353257893275483274832;}finally {}): try/finally
 empty_block_case_test: Crash # (switch (1){case 1:{}case 2:Expect.equals(true,false);}): Unhandled node
-enum_test: Crash # (switch (e){case Enu...  Unhandled node
 execute_finally10_test: Crash # (try {throw 'foo';}c...  try/finally
 execute_finally11_test: Crash # (try {throw 'foo';}c...  try/finally
 execute_finally12_test: Crash # (try {try {}finally {a=8;break;}}finally {return a==8;}): try/finally
@@ -456,13 +450,10 @@ inference_mixin_field_test: Crash # Internal Error: No default constructor avail
 inferrer_synthesized_constructor_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
 inferrer_synthesized_super_constructor_test: Crash # Invalid argument(s)
 infinite_switch_label_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
-inlined_throw_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
 instanceof4_test/01: RuntimeError # Please triage this failure.
 integer_division_by_zero_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
 invocation_mirror_invoke_on_test: RuntimeError # Please triage this failure.
 invocation_mirror_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
-issue10581_test: Crash # (switch (type){case ...  Unhandled node
-issue12023_test: Crash # (switch (action){cas...  Unhandled node
 issue13474_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
 issue20476_test: Crash # (try {try {return 1;}catch (e1){}finally {return 3;}}catch (e2){}finally {return 5;}): try/finally
 issue_1751477_test: RuntimeError # O.loadLibrary is not a function
@@ -494,7 +485,6 @@ modulo_test: Crash # Instance of 'TypeOperator': type check unimplemented for _N
 nested_switch_label_test: Crash # (switch (target){out...  Unhandled node
 no_such_method_test: RuntimeError # Please triage this failure.
 overridden_no_such_method_test: RuntimeError # Please triage this failure.
-phi_merge_test: Crash # (switch (value){case 42:break;case 43:break;}): Unhandled node
 ref_before_declaration_test/00: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
 ref_before_declaration_test/01: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
 ref_before_declaration_test/02: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
@@ -502,7 +492,6 @@ ref_before_declaration_test/03: Crash # (switch (x){case 0:var x='Does fuzzy log
 ref_before_declaration_test/04: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
 ref_before_declaration_test/05: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
 ref_before_declaration_test/06: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
-ref_before_declaration_test/none: Crash # (switch (x){case 0:var x='Does fuzzy logic tickle?';}): Unhandled node
 regress_18435_test: Crash # Invalid argument(s)
 regress_18535_test: Crash # Internal Error: No default constructor available.
 regress_21795_test: Crash # (try {foo(t);}finally {if(t==0){try {}catch (err,st){}}}): try/finally
@@ -539,16 +528,8 @@ super_operator_index_test/03: Crash # (super[4]=42): visitUnresolvedSuperIndexSe
 super_operator_index_test/04: Crash # The null object does not have a getter 'isParameter'.
 super_operator_index_test/05: Crash # (super[4]=42): visitUnresolvedSuperIndexSet
 super_operator_index_test/06: Crash # The null object does not have a getter 'isParameter'.
-switch6_test: Crash # (switch (a){case 0:{x=0;break;}case 1:x=1;break;}): Unhandled node
-switch8_test: Crash # (switch (new List(1)[0]){case const A():throw 'Test failed';}): Unhandled node
-switch_bad_case_test/none: Crash # (switch (n){case 1:return "I";case 4:return "IV";}): Unhandled node
-switch_case_static_const_test: Crash # (switch (p){case S:break;case A.S:break;case 'abc':break;}): Unhandled node
-switch_case_test/none: Crash # (switch (new B()){}): Unhandled node
-switch_fallthru_test: Crash # (switch (n){case 0:result="zero";break;case 1:result="one";case 9:result="nine";}): Unhandled node
 switch_label2_test: Crash # (switch (target){cas...  Unhandled node
 switch_label_test: Crash # (switch (animal){cas...  Unhandled node
-switch_scope_test: Crash # (switch (1){case 1:f...  Unhandled node
-switch_test: Crash # (switch (input){case true:result=12;break;case false:result=22;}): Unhandled node
 switch_try_catch_test: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
 sync_generator1_test/01: Crash # Instance of 'TypeOperator': type check unimplemented for _Nullary.
 sync_generator1_test/none: Crash # (einsZwei()sync*{yie...  cannot handle async/sync*/async* functions
@@ -588,4 +569,3 @@ type_variable_closure_test: Crash # Instance of 'TypeOperator': type check unimp
 typevariable_substitution2_test/01: Crash # Internal Error: No default constructor available.
 typevariable_substitution2_test/02: Crash # Internal Error: No default constructor available.
 typevariable_substitution2_test/none: Crash # Internal Error: No default constructor available.
-void_type_test: Crash # (switch (n){case 0:x...  Unhandled node