[interpreter] Remove BytecodeArrayBuilder::Illegal().

src/interpreter/bytecode-generator.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/interpreter/bytecode-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 637 matching lines @@
                                          size_t size,
                                          ZoneVector<BytecodeLabel>& targets) {
   // TODO(neis): Optimize this by using a proper jump table.
   for (size_t i = start_index; i < start_index + size; i++) {
     DCHECK(0 <= i && i < targets.size());
     builder()
         ->LoadLiteral(Smi::FromInt(static_cast<int>(i)))
         .CompareOperation(Token::Value::EQ_STRICT, index)
         .JumpIfTrue(&(targets[i]));
   }
-  // TODO(oth): This should be an abort via the runtime with a
-  // corresponding message., An illegal bytecode should never be
-  // emitted in valid bytecode.
-  builder()->Illegal();  // Should never get here.
+
+  RegisterAllocationScope register_scope(this);
+  Register reason = register_allocator()->NewRegister();
+  BailoutReason bailout_reason = BailoutReason::kInvalidJumpTableIndex;
+  builder()
+      ->LoadLiteral(Smi::FromInt(static_cast<int>(bailout_reason)))
+      .StoreAccumulatorInRegister(reason)
+      .CallRuntime(Runtime::kAbort, reason, 1);
 }
 
 void BytecodeGenerator::VisitIterationHeader(IterationStatement* stmt,
                                              LoopBuilder* loop_builder) {
   // Recall that stmt->yield_count() is always zero inside ordinary
   // (i.e. non-generator) functions.
 
   // Collect all labels for generator resume points within the loop (if any) so
   // that they can be bound to the loop header below. Also create fresh labels
   // for these resume points, to be used inside the loop.
@@ skipping 2598 matching lines @@
 }
 
 
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->shared_info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8