[turbofan] Support variable size argument popping in TF-generated functions

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 <vector>
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
@@ skipping 338 matching lines @@
     }
     *os << ") and effect (";
     effect_matcher_.DescribeTo(os);
     *os << ") and control (";
     control_matcher_.DescribeTo(os);
     *os << ")";
   }
 
   bool MatchAndExplain(Node* node, MatchResultListener* listener) const final {
     return (NodeMatcher::MatchAndExplain(node, listener) &&
-            PrintMatchAndExplain(NodeProperties::GetValueInput(node, 0),
+            PrintMatchAndExplain(NodeProperties::GetValueInput(node, 1),
                                  "value", value_matcher_, listener) &&
             (!has_second_return_value_ ||
-             PrintMatchAndExplain(NodeProperties::GetValueInput(node, 1),
+             PrintMatchAndExplain(NodeProperties::GetValueInput(node, 2),
                                   "value2", value2_matcher_, listener)) &&
             PrintMatchAndExplain(NodeProperties::GetEffectInput(node), "effect",
                                  effect_matcher_, listener) &&
             PrintMatchAndExplain(NodeProperties::GetControlInput(node),
                                  "control", control_matcher_, listener));
   }
 
  private:
   const Matcher<Node*> value_matcher_;
   const Matcher<Node*> value2_matcher_;
@@ skipping 2006 matching lines @@
 IS_UNOP_MATCHER(StringFromCharCode)
 IS_UNOP_MATCHER(Word32Clz)
 IS_UNOP_MATCHER(Word32Ctz)
 IS_UNOP_MATCHER(Word32Popcnt)
 IS_UNOP_MATCHER(Word32ReverseBytes)
 #undef IS_UNOP_MATCHER
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8