Merge ConstantInstr -> UnboxDouble to UnboxedConstant. Reduces register usage and allows for variou…

runtime/vm/flow_graph_compiler_mips.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_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1666 matching lines @@
       ASSERT(destination.IsDoubleStackSlot());
       const intptr_t source_offset = source.ToStackSlotOffset();
       const intptr_t dest_offset = destination.ToStackSlotOffset();
       __ LoadDFromOffset(DTMP, FP, source_offset);
       __ StoreDToOffset(DTMP, FP, dest_offset);
     }
   } else if (source.IsQuadStackSlot()) {
     UNIMPLEMENTED();
   } else {
     ASSERT(source.IsConstant());
+    const Object& constant = source.constant();
     if (destination.IsRegister()) {
-      const Object& constant = source.constant();
       __ LoadObject(destination.reg(), constant);
+    } else if (destination.IsFpuRegister()) {
+      __ LoadObject(TMP, constant);
+      __ LoadDFromOffset(destination.fpu_reg(), TMP,
+          Double::value_offset() - kHeapObjectTag);
     } else {
       ASSERT(destination.IsStackSlot());
       const intptr_t dest_offset = destination.ToStackSlotOffset();
-      __ LoadObject(TMP, source.constant());
+      __ LoadObject(TMP, constant);
       __ StoreToOffset(TMP, FP, dest_offset);
     }
   }
 
   move->Eliminate();
 }
 
 
 void ParallelMoveResolver::EmitSwap(int index) {
   MoveOperands* move = moves_[index];
@@ skipping 143 matching lines @@
   __ AddImmediate(SP, kDoubleSize);
 }
 
 
 #undef __
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS