[turbofan] Fix ControlFlowOptimizer to also handle non-control nodes in the control chain.

test/unittests/compiler/node-test-utils.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "test/unittests/compiler/node-test-utils.h"
 
 #include "src/assembler.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/unique.h"
@@ skipping 1285 matching lines @@
   return MakeMatcher(new IsControl1Matcher(IrOpcode::kIfTrue, control_matcher));
 }
 
 
 Matcher<Node*> IsIfFalse(const Matcher<Node*>& control_matcher) {
   return MakeMatcher(
       new IsControl1Matcher(IrOpcode::kIfFalse, control_matcher));
 }
 
 
+Matcher<Node*> IsIfSuccess(const Matcher<Node*>& control_matcher) {
+  return MakeMatcher(
+      new IsControl1Matcher(IrOpcode::kIfSuccess, control_matcher));
+}
+
+
 Matcher<Node*> IsSwitch(const Matcher<Node*>& value_matcher,
                         const Matcher<Node*>& control_matcher) {
   return MakeMatcher(new IsSwitchMatcher(value_matcher, control_matcher));
 }
 
 
 Matcher<Node*> IsIfValue(const Matcher<int32_t>& value_matcher,
                          const Matcher<Node*>& control_matcher) {
   return MakeMatcher(new IsIfValueMatcher(value_matcher, control_matcher));
 }
@@ skipping 294 matching lines @@
 IS_UNOP_MATCHER(Float64RoundTiesAway)
 IS_UNOP_MATCHER(NumberToInt32)
 IS_UNOP_MATCHER(NumberToUint32)
 IS_UNOP_MATCHER(ObjectIsSmi)
 IS_UNOP_MATCHER(ObjectIsNonNegativeSmi)
 #undef IS_UNOP_MATCHER
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8