added a skeleton of the ARM backend
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28301 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMInstrInfo.cpp b/lib/Target/ARM/ARMInstrInfo.cpp
new file mode 100644
index 0000000..2ae23c7
--- /dev/null
+++ b/lib/Target/ARM/ARMInstrInfo.cpp
@@ -0,0 +1,58 @@
+//===- ARMInstrInfo.cpp - ARM Instruction Information -----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the "Instituto Nokia de Tecnologia" and
+// is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the ARM implementation of the TargetInstrInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARMInstrInfo.h"
+#include "ARM.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "ARMGenInstrInfo.inc"
+using namespace llvm;
+
+ARMInstrInfo::ARMInstrInfo()
+ : TargetInstrInfo(ARMInsts, sizeof(ARMInsts)/sizeof(ARMInsts[0])) {
+}
+
+/// Return true if the instruction is a register to register move and
+/// leave the source and dest operands in the passed parameters.
+///
+bool ARMInstrInfo::isMoveInstr(const MachineInstr &MI,
+ unsigned &SrcReg, unsigned &DstReg) const {
+ // We look for 3 kinds of patterns here:
+ // or with G0 or 0
+ // add with G0 or 0
+ // fmovs or FpMOVD (pseudo double move).
+ assert(0 && "not implemented");
+ return false;
+}
+
+/// isLoadFromStackSlot - If the specified machine instruction is a direct
+/// load from a stack slot, return the virtual or physical register number of
+/// the destination along with the FrameIndex of the loaded stack slot. If
+/// not, return 0. This predicate must return 0 if the instruction has
+/// any side effects other than loading from the stack slot.
+unsigned ARMInstrInfo::isLoadFromStackSlot(MachineInstr *MI,
+ int &FrameIndex) const {
+ assert(0 && "not implemented");
+ return 0;
+}
+
+/// isStoreToStackSlot - If the specified machine instruction is a direct
+/// store to a stack slot, return the virtual or physical register number of
+/// the source reg along with the FrameIndex of the loaded stack slot. If
+/// not, return 0. This predicate must return 0 if the instruction has
+/// any side effects other than storing to the stack slot.
+unsigned ARMInstrInfo::isStoreToStackSlot(MachineInstr *MI,
+ int &FrameIndex) const {
+ assert(0 && "not implemented");
+ return 0;
+}