Add a linear scan register allocator to the optimizing compiler.

This is a "by-the-book" implementation. It currently only deals
with allocating registers, with no hint optimizations.

The changes remaining to make it functional are:
- Allocate spill slots.
- Resolution and placements of Move instructions.
- Connect it to the code generator.

Change-Id: Ie0b2f6ba1b98da85425be721ce4afecd6b4012a4

1 files changed, 11 insertions, 0 deletions

diff --git a/compiler/optimizing/code_generator_arm.h b/compiler/optimizing/code_generator_arm.h
index 2405d4b..423b13e 100644
--- a/compiler/optimizing/code_generator_arm.h
+++ b/compiler/optimizing/code_generator_arm.h
@@ -133,6 +133,17 @@ class CodeGeneratorARM : public CodeGenerator {
   int32_t GetStackSlot(HLocal* local) const;
   virtual Location GetStackLocation(HLoadLocal* load) const OVERRIDE;
 
+  virtual size_t GetNumberOfCoreRegisters() const OVERRIDE {
+    return kNumberOfCoreRegisters;
+  }
+
+  virtual size_t GetNumberOfFloatingPointRegisters() const OVERRIDE {
+    return kNumberOfDRegisters;
+  }
+
+  virtual void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
+  virtual void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;
+
  private:
   // Helper method to move a 32bits value between two locations.
   void Move32(Location destination, Location source);