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

test/unittests/compiler/common-operator-unittest.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 <limits>
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/compiler/operator-properties.h"
@@ skipping 174 matching lines @@
     EXPECT_EQ(0, op->ControlOutputCount());
   }
 }
 
 
 TEST_F(CommonOperatorTest, Return) {
   TRACED_FOREACH(int, input_count, kArguments) {
     const Operator* const op = common()->Return(input_count);
     EXPECT_EQ(IrOpcode::kReturn, op->opcode());
     EXPECT_EQ(Operator::kNoThrow, op->properties());
-    EXPECT_EQ(input_count, op->ValueInputCount());
+    EXPECT_EQ(input_count + 1, op->ValueInputCount());
     EXPECT_EQ(1, op->EffectInputCount());
     EXPECT_EQ(1, op->ControlInputCount());
-    EXPECT_EQ(2 + input_count, OperatorProperties::GetTotalInputCount(op));
+    EXPECT_EQ(3 + input_count, OperatorProperties::GetTotalInputCount(op));
     EXPECT_EQ(0, op->ValueOutputCount());
     EXPECT_EQ(0, op->EffectOutputCount());
     EXPECT_EQ(1, op->ControlOutputCount());
   }
 }
 
 
 TEST_F(CommonOperatorTest, Branch) {
   TRACED_FOREACH(BranchHint, hint, kBranchHints) {
     const Operator* const op = common()->Branch(hint);
@@ skipping 174 matching lines @@
     EXPECT_EQ(2, OperatorProperties::GetTotalInputCount(op));
     EXPECT_EQ(0, op->ControlOutputCount());
     EXPECT_EQ(0, op->EffectOutputCount());
     EXPECT_EQ(1, op->ValueOutputCount());
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8