Support passing arguments to invoke-static* instructions.

- Stop using the frame pointer for accessing locals.
- Stop emulating a stack when doing code generation. Instead,
  rely on dex register model, where instructions only reference
  registers.

Change-Id: Id51bd7d33ac430cb87a53c9f4b0c864eeb1006f9

1 files changed, 28 insertions, 2 deletions

diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 24dcab6..01bbcc0 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -141,8 +141,7 @@ class CodeGenerator : public ArenaObject {
   virtual void GenerateFrameEntry() = 0;
   virtual void GenerateFrameExit() = 0;
   virtual void Bind(Label* label) = 0;
-  virtual void Move(HInstruction* instruction, Location location) = 0;
-  virtual void Push(HInstruction* instruction, Location location) = 0;
+  virtual void Move(HInstruction* instruction, Location location, HInstruction* move_for) = 0;
   virtual HGraphVisitor* GetLocationBuilder() = 0;
   virtual HGraphVisitor* GetInstructionVisitor() = 0;
   virtual Assembler* GetAssembler() = 0;
@@ -191,6 +190,33 @@ class CodeGenerator : public ArenaObject {
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
+template <typename T>
+class CallingConvention {
+ public:
+  CallingConvention(const T* registers, int number_of_registers)
+      : registers_(registers), number_of_registers_(number_of_registers) {}
+
+  size_t GetNumberOfRegisters() const { return number_of_registers_; }
+
+  T GetRegisterAt(size_t index) const {
+    DCHECK_LT(index, number_of_registers_);
+    return registers_[index];
+  }
+
+  uint8_t GetStackOffsetOf(size_t index) const {
+    DCHECK_GE(index, number_of_registers_);
+    // We still reserve the space for parameters passed by registers.
+    // Add kWordSize for the method pointer.
+    return index * kWordSize + kWordSize;
+  }
+
+ private:
+  const T* registers_;
+  const size_t number_of_registers_;
+
+  DISALLOW_COPY_AND_ASSIGN(CallingConvention);
+};
+
 }  // namespace art
 
 #endif  // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_