X87: [turbofan] Support unboxed float and double stack parameters and add tests.

src/compiler/x87/instruction-selector-x87.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 "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
 namespace v8 {
@@ skipping 835 matching lines @@
         InstructionOperand value = g.CanBeImmediate(input)
                                        ? g.UseImmediate(input)
                                        : g.UseRegister(input);
         Emit(kX87Poke | MiscField::encode(slot), g.NoOutput(), value);
       }
     }
   } else {
     // Push any stack arguments.
     for (Node* input : base::Reversed(buffer.pushed_nodes)) {
       // TODO(titzer): handle pushing double parameters.
+      if (input == nullptr) continue;
       InstructionOperand value =
           g.CanBeImmediate(input)
               ? g.UseImmediate(input)
               : IsSupported(ATOM) ? g.UseRegister(input) : g.Use(input);
       Emit(kX87Push, g.NoOutput(), value);
     }
   }
 
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
@@ skipping 481 matching lines @@
       MachineOperatorBuilder::kFloat32Min |
       MachineOperatorBuilder::kFloat64Max |
       MachineOperatorBuilder::kFloat64Min |
       MachineOperatorBuilder::kWord32ShiftIsSafe;
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8