[interpreter] Fix peephole rule on eliding last before jump.

src/interpreter/bytecode-peephole-optimizer.cc

 // Copyright 2016 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-peephole-optimizer.h"
 
 #include "src/interpreter/constant-array-builder.h"
 #include "src/objects-inl.h"
 #include "src/objects.h"
 
@@ skipping 311 matching lines @@
 
   next_stage()->Write(last());
   InvalidateLast();
   node->set_bytecode(action_data->bytecode, node->operand(0));
 }
 
 void BytecodePeepholeOptimizer::ElideLastBeforeJumpAction(
     BytecodeNode* const node, const PeepholeActionAndData* action_data) {
   DCHECK(LastIsValid());
   DCHECK(Bytecodes::IsJump(node->bytecode()));
-  DCHECK(CanElideLastBasedOnSourcePosition(node));
 
-  if (!node->source_info().is_valid()) {
+  if (!CanElideLastBasedOnSourcePosition(node)) {
+    next_stage()->Write(last());
+  } else if (!node->source_info().is_valid()) {
     node->source_info().Clone(last()->source_info());
-  } else {
-    next_stage()->Write(last());
   }
   InvalidateLast();
 }
 
 void BytecodePeepholeOptimizer::ApplyPeepholeAction(BytecodeNode* const node) {
   // A single table is used for looking up peephole optimization
   // matches as it is observed to have better performance. This is
   // inspite of the fact that jump bytecodes and non-jump bytecodes
   // have different processing logic, in particular a jump bytecode
   // always needs to emit the jump via WriteJump().
   const PeepholeActionAndData* const action_data =
       PeepholeActionTable::Lookup(last()->bytecode(), node->bytecode());
   switch (action_data->action) {
 #define CASE(Action)              \
   case PeepholeAction::k##Action: \
     Action(node, action_data);    \
     break;
     PEEPHOLE_ACTION_LIST(CASE)
 #undef CASE
     default:
       UNREACHABLE();
       break;
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8