Debugger: correctly redirect code with no stack check.

src/full-codegen/mips/full-codegen-mips.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_MIPS
 
 // Note on Mips implementation:
 //
@@ skipping 348 matching lines @@
   if (scope()->HasIllegalRedeclaration()) {
     Comment cmnt(masm_, "[ Declarations");
     scope()->VisitIllegalRedeclaration(this);
 
   } else {
     PrepareForBailoutForId(BailoutId::FunctionEntry(), NO_REGISTERS);
     { Comment cmnt(masm_, "[ Declarations");
       VisitDeclarations(scope()->declarations());
     }
 
+    // Assert that the declarations do not use ICs. Otherwise the debugger
+    // won't be able to redirect a PC at an IC to the correct IC in newly
+    // recompiled code.
+    DCHECK_EQ(0, ic_total_count_);
+
     { Comment cmnt(masm_, "[ Stack check");
       PrepareForBailoutForId(BailoutId::Declarations(), NO_REGISTERS);
       Label ok;
       __ LoadRoot(at, Heap::kStackLimitRootIndex);
       __ Branch(&ok, hs, sp, Operand(at));
       Handle<Code> stack_check = isolate()->builtins()->StackCheck();
       PredictableCodeSizeScope predictable(masm_,
           masm_->CallSize(stack_check, RelocInfo::CODE_TARGET));
       __ Call(stack_check, RelocInfo::CODE_TARGET);
       __ bind(&ok);
@@ skipping 5051 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS