Add R600 backend

A new backend supporting AMD GPUs: Radeon HD2XXX - HD7XXX

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169915 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 51 insertions, 0 deletions

diff --git a/lib/Target/R600/AMDGPURegisterInfo.cpp b/lib/Target/R600/AMDGPURegisterInfo.cpp
new file mode 100644
index 0000000000..eeafec898d
--- /dev/null
+++ b/lib/Target/R600/AMDGPURegisterInfo.cpp
@@ -0,0 +1,51 @@
+//===-- AMDGPURegisterInfo.cpp - AMDGPU Register Information -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// \brief Parent TargetRegisterInfo class common to all hw codegen targets.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AMDGPURegisterInfo.h"
+#include "AMDGPUTargetMachine.h"
+
+using namespace llvm;
+
+AMDGPURegisterInfo::AMDGPURegisterInfo(TargetMachine &tm,
+    const TargetInstrInfo &tii)
+: AMDGPUGenRegisterInfo(0),
+  TM(tm),
+  TII(tii)
+  { }
+
+//===----------------------------------------------------------------------===//
+// Function handling callbacks - Functions are a seldom used feature of GPUS, so
+// they are not supported at this time.
+//===----------------------------------------------------------------------===//
+
+const uint16_t AMDGPURegisterInfo::CalleeSavedReg = AMDGPU::NoRegister;
+
+const uint16_t* AMDGPURegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
+                                                                         const {
+  return &CalleeSavedReg;
+}
+
+void AMDGPURegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator MI,
+                                             int SPAdj,
+                                             RegScavenger *RS) const {
+  assert(!"Subroutines not supported yet");
+}
+
+unsigned AMDGPURegisterInfo::getFrameRegister(const MachineFunction &MF) const {
+  assert(!"Subroutines not supported yet");
+  return 0;
+}
+
+#define GET_REGINFO_TARGET_DESC
+#include "AMDGPUGenRegisterInfo.inc"