Record AST ids in relocation info at spots where we collect dynamic type feedback.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
diff --git a/src/arm/assembler-arm.h b/src/arm/assembler-arm.h
index 9050c2c5d9bb33a5fdae1ffee14076f2f5b2a454..3ee7aab538c4115a4435ff682391f52dc7122f8d 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -1166,6 +1166,10 @@ class Assembler : public AssemblerBase {
   // Mark address of a debug break slot.
   void RecordDebugBreakSlot();
 
+  // Record the AST id of the CallIC being compiled, so that it can be placed
+  // in the relocation information.
+  void RecordAstId(unsigned ast_id) { ast_id_for_reloc_info_ = ast_id; }
+
   // Record a comment relocation entry that can be used by a disassembler.
   // Use --code-comments to enable.
   void RecordComment(const char* msg);
@@ -1223,6 +1227,11 @@ class Assembler : public AssemblerBase {
   void CheckConstPool(bool force_emit, bool require_jump);
 
  protected:
+  // Relocation for a type-recording IC has the AST id added to it.  This
+  // member variable is a way to pass the information from the call site to
+  // the relocation info.
+  unsigned ast_id_for_reloc_info_;
+
   bool emit_debug_code() const { return emit_debug_code_; }
 
   int buffer_space() const { return reloc_info_writer.pos() - pc_; }
@@ -1322,6 +1331,7 @@ class Assembler : public AssemblerBase {
   RelocInfo prinfo_[kMaxNumPRInfo];  // the buffer of pending relocation info
   int num_prinfo_;  // number of pending reloc info entries in the buffer
 
+
   // The bound position, before this we cannot do instruction elimination.
   int last_bound_pos_;