Turn throws into basic block terminators.

src/compiler/instruction-selector.cc

 // Copyright 2014 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/instruction-selector.h"
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/pipeline.h"
@@ skipping 503 matching lines @@
       return VisitBranch(input, tbranch, fbranch);
     }
     case BasicBlock::kReturn: {
       // If the result itself is a return, return its input.
       Node* value = (input != NULL && input->opcode() == IrOpcode::kReturn)
                         ? input->InputAt(0)
                         : input;
       return VisitReturn(value);
     }
     case BasicBlock::kThrow:
-      return VisitThrow(input);
+      DCHECK_EQ(IrOpcode::kThrow, input->opcode());
+      return VisitThrow(input->InputAt(0));
     case BasicBlock::kNone: {
       // TODO(titzer): exit block doesn't have control.
       DCHECK(input == NULL);
       break;
     }
     default:
       UNREACHABLE();
       break;
   }
 }
@@ skipping 507 matching lines @@
   if (value != NULL) {
     Emit(kArchRet, NULL, g.UseLocation(value, linkage()->GetReturnLocation(),
                                        linkage()->GetReturnType()));
   } else {
     Emit(kArchRet, NULL);
   }
 }
 
 
 void InstructionSelector::VisitThrow(Node* value) {
-  UNIMPLEMENTED();  // TODO(titzer)
+  Emit(kArchNop, NULL);  // TODO(titzer)
 }
 
 
 void InstructionSelector::FillTypeVectorFromStateValues(
     ZoneVector<MachineType>* types, Node* state_values) {
   DCHECK(state_values->opcode() == IrOpcode::kStateValues);
   int count = state_values->InputCount();
   types->reserve(static_cast<size_t>(count));
   for (int i = 0; i < count; i++) {
     types->push_back(GetMachineType(state_values->InputAt(i)));
@@ skipping 110 matching lines @@
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::Flag::kNoFlags;
 }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8