[wasm] remove faux code objects

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 3670d7fa5c5ca24026b22a235b02b2e7acb7243a..fc4721072f1195f70ce318b861a55b40eccb5abc 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -421,7 +421,8 @@ class RelocInfo {
     // This is not an actual reloc mode, but used to encode a long pc jump that
     // cannot be encoded as part of another record.
     PC_JUMP,
-
+    WASM_DIRECT_CALL,
+    WASM_IMPORT_CALL,
     // Pseudo-types
     NUMBER_OF_MODES,
     NONE32,             // never recorded 32-bit value
@@ -529,6 +530,9 @@ class RelocInfo {
   static inline bool IsWasmMemorySizeReference(Mode mode) {
     return mode == WASM_MEMORY_SIZE_REFERENCE;
   }
+  static inline bool IsWasmCall(Mode mode) {
+    return mode == WASM_DIRECT_CALL || mode == WASM_IMPORT_CALL;
+  }
   static inline int ModeMask(Mode mode) { return 1 << mode; }
 
   // Accessors
@@ -557,6 +561,8 @@ class RelocInfo {
 
   Address wasm_memory_reference();
   uint32_t wasm_memory_size_reference();
+  uint32_t wasm_function_index();
+
   void update_wasm_memory_reference(
       Address old_base, Address new_base, uint32_t old_size, uint32_t new_size,
       ICacheFlushMode icache_flush_mode = SKIP_ICACHE_FLUSH);
@@ -665,6 +671,8 @@ class RelocInfo {
 #endif
 
   static const int kCodeTargetMask = (1 << (LAST_CODE_ENUM + 1)) - 1;
+  static const int kWasmDirectCallMask = 1 << WASM_DIRECT_CALL;
+  static const int kWasmImportCallMask = 1 << WASM_IMPORT_CALL;
   static const int kPositionMask = 1 << POSITION | 1 << STATEMENT_POSITION;
   static const int kDataMask =
       (1 << CODE_TARGET_WITH_ID) | kPositionMask | (1 << COMMENT);
@@ -731,6 +739,10 @@ class RelocInfoWriter BASE_EMBEDDED {
   // Here we use the maximum of the two.
   static const int kMaxSize = 15;
 
+  // Update the mode. This should be used carefully, the new mode should have
+  // the same schema as the old one.
+  void WriteModeNoAdvance(RelocInfo::Mode rmode);
+
  private:
   inline uint32_t WriteLongPCJump(uint32_t pc_delta);
 
@@ -785,6 +797,8 @@ class RelocIterator: public Malloced {
     return &rinfo_;
   }
 
+  byte* mode_pos() const { return mode_pos_; }
+
  private:
   // Advance* moves the position before/after reading.
   // *Read* reads from current byte(s) into rinfo_.
@@ -814,6 +828,7 @@ class RelocIterator: public Malloced {
   }
 
   byte* pos_;
+  byte* mode_pos_;
   byte* end_;
   byte* code_age_sequence_;
   RelocInfo rinfo_;