[debugger] Ensure at least one breakable position per function.

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.
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 288 matching lines @@
     SetVar(arguments, v0, a1, a2);
   }
 
   if (FLAG_trace) {
     __ CallRuntime(Runtime::kTraceEnter);
   }
 
   // Visit the declarations and body unless there is an illegal
   // redeclaration.
   if (scope()->HasIllegalRedeclaration()) {
-    Comment cmnt(masm_, "[ Declarations");
-    VisitForEffect(scope()->GetIllegalRedeclaration());
-
+    EmitIllegalRedeclaration();
   } 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_);
@@ skipping 3885 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS