[turbofan] Disable loop peeling for asm.js.

src/compilation-info.h

 // Copyright 2016 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.
 
 #ifndef V8_COMPILATION_INFO_H_
 #define V8_COMPILATION_INFO_H_
 
 #include <memory>
 
 #include "src/compilation-dependencies.h"
@@ skipping 31 matching lines @@
     kSerializing = 1 << 6,
     kFunctionContextSpecializing = 1 << 7,
     kFrameSpecializing = 1 << 8,
     kInliningEnabled = 1 << 9,
     kDisableFutureOptimization = 1 << 10,
     kSplittingEnabled = 1 << 11,
     kDeoptimizationEnabled = 1 << 12,
     kSourcePositionsEnabled = 1 << 13,
     kBailoutOnUninitialized = 1 << 14,
     kOptimizeFromBytecode = 1 << 15,
+    kLoopPeelingEnabled = 1 << 16,
   };
 
   CompilationInfo(ParseInfo* parse_info, Handle<JSFunction> closure);
   CompilationInfo(Vector<const char> debug_name, Isolate* isolate, Zone* zone,
                   Code::Flags code_flags);
   ~CompilationInfo();
 
   ParseInfo* parse_info() const { return parse_info_; }
 
   // -----------------------------------------------------------
@@ skipping 103 matching lines @@
   bool is_bailout_on_uninitialized() const {
     return GetFlag(kBailoutOnUninitialized);
   }
 
   void MarkAsOptimizeFromBytecode() { SetFlag(kOptimizeFromBytecode); }
 
   bool is_optimizing_from_bytecode() const {
     return GetFlag(kOptimizeFromBytecode);
   }
 
+  void MarkAsLoopPeelingEnabled() { SetFlag(kLoopPeelingEnabled); }
+
+  bool is_loop_peeling_enabled() const { return GetFlag(kLoopPeelingEnabled); }
+
   bool GeneratePreagedPrologue() const {
     // Generate a pre-aged prologue if we are optimizing for size, which
     // will make code flushing more aggressive. Only apply to Code::FUNCTION,
     // since StaticMarkingVisitor::IsFlushable only flushes proper functions.
     return FLAG_optimize_for_size && FLAG_age_code && !is_debug() &&
            output_code_kind() == Code::FUNCTION;
   }
 
   void SetCode(Handle<Code> code) { code_ = code; }
 
@@ skipping 195 matching lines @@
 
   Vector<const char> debug_name_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILATION_INFO_H_