Skeleton of a linear scan register allocator.

runtime/vm/il_printer.cc

 // Copyright (c) 2012, 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/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 
 namespace dart {
@@ skipping 46 matching lines @@
 }
 
 
 void FlowGraphPrinter::PrintInstruction(Instruction* instr) {
   char str[1000];
   BufferFormatter f(str, sizeof(str));
   instr->PrintTo(&f);
   if (FLAG_print_environments && (instr->env() != NULL)) {
     instr->env()->PrintTo(&f);
   }
+  if (print_locations_ && (instr->locs() != NULL)) {
+    instr->locs()->PrintTo(&f);
+  }
+  if (instr->lifetime_position() != -1) {
+    OS::Print("%3d: ", instr->lifetime_position());
+  }
   OS::Print("%s", str);
 }
 
 
 void FlowGraphPrinter::PrintComputation(Computation* comp) {
   char str[1000];
   BufferFormatter f(str, sizeof(str));
   comp->PrintTo(&f);
   OS::Print("%s", str);
 }
@@ skipping 333 matching lines @@
   if (is_negated()) {
     f->Print(" (negated)");
   }
   f->Print(" goto (%d, %d)",
             true_successor()->block_id(),
             false_successor()->block_id());
 }
 
 
 void ParallelMoveInstr::PrintTo(BufferFormatter* f) const {
-  UNIMPLEMENTED();
+  f->Print("    %s ", DebugName());
+  for (intptr_t i = 0; i < moves_.length(); i++) {
+    if (i != 0) f->Print(", ");
+    f->Print("%s = %s", moves_[i].dest().Name(), moves_[i].src().Name());
+  }
 }
 
 
 void FlowGraphVisualizer::Print(const char* format, ...) {
   char str[1000];
   BufferFormatter f(str, sizeof(str));
   f.Print("%*s", 2 * indent_, "");
   va_list args;
   va_start(args, format);
   f.VPrint(format, args);
@@ skipping 229 matching lines @@
 void ParallelMoveInstr::PrintToVisualizer(BufferFormatter* f) const {
   UNIMPLEMENTED();
 }
 
 
 void Environment::PrintTo(BufferFormatter* f) const {
   f->Print(" env={ ");
   for (intptr_t i = 0; i < values_.length(); ++i) {
     if (i > 0) f->Print(", ");
     values_[i]->PrintTo(f);
+    if ((i < locations_.length()) && !locations_[i].IsInvalid()) {
+      f->Print(" [%s]", locations_[i].Name());
+    }
   }
   f->Print(" }");
 }
 
 }  // namespace dart