Use a uniform way to emit code for all instructions.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 3814 matching lines @@
                             instance_call()->ArgumentCount(),
                             instance_call()->argument_names(),
                             deopt,
                             deopt_id(),
                             instance_call()->token_pos(),
                             locs());
 }
 
 
 LocationSummary* BranchInstr::MakeLocationSummary() const {
-  UNREACHABLE();
-  return NULL;
+  LocationSummary* summary = comparison()->locs();
+  // Share the location summary with the comparison.  Branches don't produce
+  // a result.
+  summary->set_out(Location::NoLocation());
+  return summary;
 }
 
 
 void BranchInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   comparison()->EmitBranchCode(compiler, this);
 }
 
 
 LocationSummary* CheckClassInstr::MakeLocationSummary() const {
   const intptr_t kNumInputs = 1;
@@ skipping 209 matching lines @@
   __ int3();
 }
 
 
 LocationSummary* GotoInstr::MakeLocationSummary() const {
   return new LocationSummary(0, 0, LocationSummary::kNoCall);
 }
 
 
 void GotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  if (!compiler->is_optimizing()) {
-    // Add deoptimization descriptor for deoptimizing instructions that may
-    // be inserted before this instruction.
-    compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
-                                   GetDeoptId(),
-                                   0);  // No token position.
-  }
-
   if (HasParallelMove()) {
     compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
   }
 
   // We can fall through if the successor is the next block in the list.
   // Otherwise, we need a jump.
   if (!compiler->CanFallThroughTo(successor())) {
     __ jmp(compiler->GetJumpLabel(successor()));
   }
 }
@@ skipping 239 matching lines @@
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64