Refactor RangeBoundary +/- infinity to be distinct RangeBoundary kinds.

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 278 matching lines @@
   char buffer[256];
   BufferFormatter f(buffer, sizeof(buffer));
   range->PrintTo(&f);
   return Isolate::Current()->current_zone()->MakeCopyOfString(buffer);
 }
 
 
 void RangeBoundary::PrintTo(BufferFormatter* f) const {
   switch (kind_) {
     case kSymbol:
-      f->Print("v%" Pd,
+      f->Print("v%" Pd "",
                reinterpret_cast<Definition*>(value_)->ssa_temp_index());
-      if (offset_ != 0) f->Print("%+" Pd, offset_);
+      if (offset_ != 0) f->Print("%+" Pd "", offset_);
+      break;
+    case kNegativeInfinity:
+      f->Print("-inf");
+      break;
+    case kPositiveInfinity:
+      f->Print("+inf");
       break;
     case kConstant:
-      if (value_ == kMinusInfinity) {
-        f->Print("-inf");
-      } else if (value_ == kPlusInfinity) {
-        f->Print("+inf");
-      } else {
-        f->Print("%" Pd, value_);
-      }
+      f->Print("%" Pd "", value_);
       break;
     case kUnknown:
       f->Print("_|_");
       break;
   }
 }
 
 
 const char* RangeBoundary::ToCString() const {
   char buffer[256];
@@ skipping 740 matching lines @@
 }
 
 const char* Environment::ToCString() const {
   char buffer[1024];
   BufferFormatter bf(buffer, 1024);
   PrintTo(&bf);
   return Isolate::Current()->current_zone()->MakeCopyOfString(buffer);
 }
 
 }  // namespace dart