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, 8 insertions, 0 deletions

diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index f1b16a1..ed3f43c 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -37,6 +37,14 @@ namespace arm {
 static constexpr int kNumberOfPushedRegistersAtEntry = 1;
 static constexpr int kCurrentMethodStackOffset = 0;
 
+void CodeGeneratorARM::DumpCoreRegister(std::ostream& stream, int reg) const {
+  stream << ArmManagedRegister::FromCoreRegister(Register(reg));
+}
+
+void CodeGeneratorARM::DumpFloatingPointRegister(std::ostream& stream, int reg) const {
+  stream << ArmManagedRegister::FromDRegister(DRegister(reg));
+}
+
 CodeGeneratorARM::CodeGeneratorARM(HGraph* graph)
     : CodeGenerator(graph, kNumberOfRegIds),
       location_builder_(graph, this),