Fix OSR for nested loops.

src/arm/full-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 296 matching lines @@
   }
 
   // Always emit a 'return undefined' in case control fell off the end of
   // the body.
   { Comment cmnt(masm_, "[ return <undefined>;");
     __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
   }
   EmitReturnSequence();
 
   // Force emit the constant pool, so it doesn't get emitted in the middle
-  // of the stack check table.
+  // of the back edge table.
   masm()->CheckConstPool(true, false);
 }
 
 
 void FullCodeGenerator::ClearAccumulator() {
   __ mov(r0, Operand(Smi::FromInt(0)));
 }
 
 
 void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) {
@@ skipping 16 matching lines @@
   }
   __ mov(r2, Operand(profiling_counter_));
   __ mov(r3, Operand(Smi::FromInt(reset_value)));
   __ str(r3, FieldMemOperand(r2, JSGlobalPropertyCell::kValueOffset));
 }
 
 
 void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
                                                 Label* back_edge_target) {
   Comment cmnt(masm_, "[ Back edge bookkeeping");
-  // Block literal pools whilst emitting stack check code.
+  // Block literal pools whilst emitting back edge code.
   Assembler::BlockConstPoolScope block_const_pool(masm_);
   Label ok;
 
   int weight = 1;
   if (FLAG_weighted_back_edges) {
     ASSERT(back_edge_target->is_bound());
     int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
     weight = Min(kMaxBackEdgeWeight,
                  Max(1, distance / kBackEdgeDistanceUnit));
   }
@@ skipping 4203 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM