From c9e935c7e29b594af040e5a0edd86b8d8b8a08ea Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Thu, 15 Dec 2011 22:58:58 +0000
Subject: Move parts of lib/Target that use CodeGen into lib/CodeGen.

llvm-svn: 146702
---
 llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp | 45 ++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp

(limited to 'llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp')

diff --git a/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp b/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
new file mode 100644
index 00000000000..cadb87815db
--- /dev/null
+++ b/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
@@ -0,0 +1,45 @@
+//===----- TargetFrameLoweringImpl.cpp - Implement target frame interface --==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the layout of a stack frame on the target machine.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+
+#include <cstdlib>
+using namespace llvm;
+
+TargetFrameLowering::~TargetFrameLowering() {
+}
+
+/// getFrameIndexOffset - Returns the displacement from the frame register to
+/// the stack frame of the specified index. This is the default implementation
+/// which is overridden for some targets.
+int TargetFrameLowering::getFrameIndexOffset(const MachineFunction &MF,
+                                         int FI) const {
+  const MachineFrameInfo *MFI = MF.getFrameInfo();
+  return MFI->getObjectOffset(FI) + MFI->getStackSize() -
+    getOffsetOfLocalArea() + MFI->getOffsetAdjustment();
+}
+
+int TargetFrameLowering::getFrameIndexReference(const MachineFunction &MF,
+                                             int FI, unsigned &FrameReg) const {
+  const TargetRegisterInfo *RI = MF.getTarget().getRegisterInfo();
+
+  // By default, assume all frame indices are referenced via whatever
+  // getFrameRegister() says. The target can override this if it's doing
+  // something different.
+  FrameReg = RI->getFrameRegister(MF);
+  return getFrameIndexOffset(MF, FI);
+}
-- 
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