[csa] Add Unreachable() and use it after throw sites

src/compiler/code-assembler.cc

 // Copyright 2015 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.
 
 #include "src/compiler/code-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 256 matching lines @@
 void CodeAssembler::Return(Node* value1, Node* value2, Node* value3) {
   return raw_assembler()->Return(value1, value2, value3);
 }
 
 void CodeAssembler::PopAndReturn(Node* pop, Node* value) {
   return raw_assembler()->PopAndReturn(pop, value);
 }
 
 void CodeAssembler::DebugBreak() { raw_assembler()->DebugBreak(); }
 
+void CodeAssembler::Unreachable() {
+  DebugBreak();
+  raw_assembler()->Unreachable();
+}
+
 void CodeAssembler::Comment(const char* format, ...) {
   if (!FLAG_code_comments) return;
   char buffer[4 * KB];
   StringBuilder builder(buffer, arraysize(buffer));
   va_list arguments;
   va_start(arguments, format);
   builder.AddFormattedList(format, arguments);
   va_end(arguments);
 
   // Copy the string before recording it in the assembler to avoid
@@ skipping 561 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8