Ensure deopt entries have no relocation information.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index b4958f5b392dc798e6fdd07c09818acc7b7c1371..c92c248820258aeacdda3fd8f313c009355ea695 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -689,6 +689,21 @@ RelocIterator::RelocIterator(const CodeDesc& desc, int mode_mask) {
 // Implementation of RelocInfo
 
 
+#ifdef DEBUG
+bool RelocInfo::RequiresRelocation(const CodeDesc& desc) {
+  // Ensure there are no code targets or embedded objects present in the
+  // deoptimization entries, they would require relocation after code
+  // generation.
+  int mode_mask = RelocInfo::kCodeTargetMask |
+                  RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
+                  RelocInfo::ModeMask(RelocInfo::GLOBAL_PROPERTY_CELL) |
+                  RelocInfo::kApplyMask;
+  RelocIterator it(desc, mode_mask);
+  return !it.done();
+}
+#endif
+
+
 #ifdef ENABLE_DISASSEMBLER
 const char* RelocInfo::RelocModeName(RelocInfo::Mode rmode) {
   switch (rmode) {