Fix has_constant_parameter_count() confusion in LReturn

src/x87/lithium-codegen-x87.cc

 // Copyright 2012 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/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 3032 matching lines @@
   if (instr->has_constant_parameter_count()) {
     int parameter_count = ToInteger32(instr->constant_parameter_count());
     if (dynamic_frame_alignment && FLAG_debug_code) {
       __ cmp(Operand(esp,
                      (parameter_count + extra_value_count) * kPointerSize),
              Immediate(kAlignmentZapValue));
       __ Assert(equal, kExpectedAlignmentMarker);
     }
     __ Ret((parameter_count + extra_value_count) * kPointerSize, ecx);
   } else {
+    DCHECK(info()->IsStub());  // Functions would need to drop one more value.
     Register reg = ToRegister(instr->parameter_count());
     // The argument count parameter is a smi
     __ SmiUntag(reg);
     Register return_addr_reg = reg.is(ecx) ? ebx : ecx;
     if (dynamic_frame_alignment && FLAG_debug_code) {
       DCHECK(extra_value_count == 2);
       __ cmp(Operand(esp, reg, times_pointer_size,
                      extra_value_count * kPointerSize),
              Immediate(kAlignmentZapValue));
       __ Assert(equal, kExpectedAlignmentMarker);
@@ skipping 3234 matching lines @@
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87