Convert some compiler passes to preserve valid def-use chains.

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"
 #include "vm/parser.h"
 
@@ skipping 288 matching lines @@
   saved_arguments_descriptor()->PrintTo(f);
   f->Print(", ?%s @%"Pd"",
            formal_parameter_name().ToCString(),
            formal_parameter_index());
 }
 
 
 void ClosureCallInstr::PrintOperandsTo(BufferFormatter* f) const {
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     if (i > 0) f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
 }
 
 
 void InstanceCallInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", function_name().ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
   if (HasICData()) {
     PrintICData(f, *ic_data());
   }
 }
 
 
 void PolymorphicInstanceCallInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", instance_call()->function_name().ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
   PrintICData(f, ic_data());
 }
 
 
 void StrictCompareInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s, ", Token::Str(kind()));
   left()->PrintTo(f);
   f->Print(", ");
   right()->PrintTo(f);
 }
 
 
 void EqualityCompareInstr::PrintOperandsTo(BufferFormatter* f) const {
   left()->PrintTo(f);
   f->Print(" %s ", Token::Str(kind()));
   right()->PrintTo(f);
   if (HasICData()) {
     PrintICData(f, *ic_data());
   }
 }
 
 
 void StaticCallInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s ", String::Handle(function().name()).ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     if (i > 0) f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
 }
 
 
 void LoadLocalInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s lvl:%"Pd"", local().name().ToCString(), context_level());
 }
 
 
 void StoreLocalInstr::PrintOperandsTo(BufferFormatter* f) const {
@@ skipping 51 matching lines @@
   if (HasICData()) {
     PrintICData(f, *ic_data());
   }
 }
 
 
 void AllocateObjectInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", Class::Handle(constructor().Owner()).ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); i++) {
     f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
 }
 
 
 void AllocateObjectWithBoundsCheckInstr::PrintOperandsTo(
     BufferFormatter* f) const {
   f->Print("%s", Class::Handle(constructor().Owner()).ToCString());
   for (intptr_t i = 0; i < InputCount(); i++) {
     f->Print(", ");
     InputAt(i)->PrintTo(f);
   }
 }
 
 
 void CreateArrayInstr::PrintOperandsTo(BufferFormatter* f) const {
   for (int i = 0; i < ArgumentCount(); ++i) {
     if (i != 0) f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
   if (ArgumentCount() > 0) f->Print(", ");
   element_type()->PrintTo(f);
 }
 
 
 void CreateClosureInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", function().ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     if (i > 0) f->Print(", ");
-    ArgumentAt(i)->value()->PrintTo(f);
+    PushArgumentAt(i)->value()->PrintTo(f);
   }
 }
 
 
 void LoadFieldInstr::PrintOperandsTo(BufferFormatter* f) const {
   value()->PrintTo(f);
   f->Print(", %"Pd", immutable=%d", offset_in_bytes(), immutable_);
 }
 
 
@@ skipping 219 matching lines @@
       f->Print(" [");
       locations_[i].PrintTo(f);
       f->Print("]");
     }
   }
   f->Print(" }");
   if (outer_ != NULL) outer_->PrintTo(f);
 }
 
 }  // namespace dart