AMDGPU: Add core backend files for R600/SI codegen v6

llvm-svn: 160270

1 files changed, 46 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp
new file mode 100644
index 00000000000..3c1f0635a0c
--- /dev/null
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.cpp
@@ -0,0 +1,46 @@
+//===-- AMDGPUInstrInfo.cpp - Base class for AMD GPU InstrInfo ------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the implementation of the TargetInstrInfo class that is
+// common to all AMD GPUs.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AMDGPUInstrInfo.h"
+#include "AMDGPURegisterInfo.h"
+#include "AMDGPUTargetMachine.h"
+#include "AMDIL.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+
+using namespace llvm;
+
+AMDGPUInstrInfo::AMDGPUInstrInfo(AMDGPUTargetMachine &tm)
+  : AMDILInstrInfo(tm) { }
+
+void AMDGPUInstrInfo::convertToISA(MachineInstr & MI, MachineFunction &MF,
+    DebugLoc DL) const
+{
+  MachineRegisterInfo &MRI = MF.getRegInfo();
+  const AMDGPURegisterInfo & RI = getRegisterInfo();
+
+  for (unsigned i = 0; i < MI.getNumOperands(); i++) {
+    MachineOperand &MO = MI.getOperand(i);
+    // Convert dst regclass to one that is supported by the ISA
+    if (MO.isReg() && MO.isDef()) {
+      if (TargetRegisterInfo::isVirtualRegister(MO.getReg())) {
+        const TargetRegisterClass * oldRegClass = MRI.getRegClass(MO.getReg());
+        const TargetRegisterClass * newRegClass = RI.getISARegClass(oldRegClass);
+
+        assert(newRegClass);
+
+        MRI.setRegClass(MO.getReg(), newRegClass);
+      }
+    }
+  }
+}