[lanai] Add Lanai backend.

Add the Lanai backend to lib/Target.

General Lanai backend discussion on llvm-dev thread "[RFC] Lanai backend" (http://lists.llvm.org/pipermail/llvm-dev/2016-February/095118.html).

Differential Revision: http://reviews.llvm.org/D17011

llvm-svn: 264578

1 files changed, 23 insertions, 0 deletions

diff --git a/llvm/lib/Target/Lanai/LanaiMachineFunctionInfo.cpp b/llvm/lib/Target/Lanai/LanaiMachineFunctionInfo.cpp
new file mode 100644
index 00000000000..c72271b6779
--- /dev/null
+++ b/llvm/lib/Target/Lanai/LanaiMachineFunctionInfo.cpp
@@ -0,0 +1,23 @@
+//===-- LanaiMachineFuctionInfo.cpp - Lanai machine function info ---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LanaiMachineFunctionInfo.h"
+
+using namespace llvm;
+
+void LanaiMachineFunctionInfo::anchor() {}
+
+unsigned LanaiMachineFunctionInfo::getGlobalBaseReg() {
+  // Return if it has already been initialized.
+  if (GlobalBaseReg)
+    return GlobalBaseReg;
+
+  return GlobalBaseReg =
+             MF.getRegInfo().createVirtualRegister(&Lanai::GPRRegClass);
+}