[wasm] Introduce the TrapIf and TrapUnless operators to generate trap code.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 925 matching lines @@
   static ExternalReference wasm_word32_ctz(Isolate* isolate);
   static ExternalReference wasm_word64_ctz(Isolate* isolate);
   static ExternalReference wasm_word32_popcnt(Isolate* isolate);
   static ExternalReference wasm_word64_popcnt(Isolate* isolate);
   static ExternalReference wasm_float64_pow(Isolate* isolate);
 
   static ExternalReference f64_acos_wrapper_function(Isolate* isolate);
   static ExternalReference f64_asin_wrapper_function(Isolate* isolate);
   static ExternalReference f64_mod_wrapper_function(Isolate* isolate);
 
+  // Trap callback function for cctest/wasm/wasm-run-utils.h
+  static ExternalReference wasm_call_trap_callback_for_testing(
+      Isolate* isolate);
+
   // Log support.
   static ExternalReference log_enter_external_function(Isolate* isolate);
   static ExternalReference log_leave_external_function(Isolate* isolate);
 
   // Static variable Heap::roots_array_start()
   static ExternalReference roots_array_start(Isolate* isolate);
 
   // Static variable Heap::allocation_sites_list_address()
   static ExternalReference allocation_sites_list_address(Isolate* isolate);
 
@@ skipping 322 matching lines @@
     std::vector<ConstantPoolEntry> shared_entries;
   };
 
   Label emitted_label_;  // Records pc_offset of emitted pool
   PerTypeEntryInfo info_[ConstantPoolEntry::NUMBER_OF_TYPES];
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_ASSEMBLER_H_