Support immediate operands for array bounds checks.

runtime/vm/locations.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/locations.h"
 
 #include "vm/il_printer.h"
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph_compiler.h"
 
@@ skipping 27 matching lines @@
     LocationSummary::ContainsCall contains_call) {
   LocationSummary* summary = new LocationSummary(input_count, 0, contains_call);
   for (intptr_t i = 0; i < input_count; i++) {
     summary->set_in(i, Location::RequiresRegister());
   }
   summary->set_out(out);
   return summary;
 }
 
 
+Location Location::RegisterOrConstant(Value* value) {
+  ConstantComp* constant = value->definition()->AsConstant();
+  return (constant != NULL)
+      ? Location::Constant(constant->value())
+      : Location::RequiresRegister();
+}
+
+
+Location Location::FixedRegisterOrConstant(Value* value, Register reg) {
+  ConstantComp* constant = value->definition()->AsConstant();
+  return (constant != NULL)
+      ? Location::Constant(constant->value())
+      : Location::RegisterLocation(reg);
+}
+
+
 const char* Location::Name() const {
   switch (kind()) {
     case kInvalid: return "?";
     case kRegister: return Assembler::RegisterName(reg());
     case kXmmRegister: return Assembler::XmmRegisterName(xmm_reg());
     case kStackSlot: return "S";
     case kDoubleStackSlot: return "DS";
     case kUnallocated:
       switch (policy()) {
         case kAny:
@@ skipping 57 matching lines @@
 
   if (!out().IsInvalid()) {
     f->Print(" => ");
     out().PrintTo(f);
   }
 
   if (always_calls()) f->Print(" C");
 }
 
 }  // namespace dart