Check in LLVM r95781.

1 files changed, 94 insertions, 0 deletions

diff --git a/lib/Target/PIC16/PIC16RegisterInfo.cpp b/lib/Target/PIC16/PIC16RegisterInfo.cpp
new file mode 100644
index 0000000..8ba9a1d
--- /dev/null
+++ b/lib/Target/PIC16/PIC16RegisterInfo.cpp
@@ -0,0 +1,94 @@
+//===- PIC16RegisterInfo.cpp - PIC16 Register Information -----------------===//
+//
+//                     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 PIC16 implementation of the TargetRegisterInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "pic16-reg-info"
+
+#include "PIC16.h"
+#include "PIC16RegisterInfo.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace llvm;
+
+PIC16RegisterInfo::PIC16RegisterInfo(const TargetInstrInfo &tii,
+                                     const PIC16Subtarget &st)
+  : PIC16GenRegisterInfo(PIC16::ADJCALLSTACKDOWN, PIC16::ADJCALLSTACKUP),
+    TII(tii),
+    ST(st) {}
+
+#include "PIC16GenRegisterInfo.inc"
+
+/// PIC16 Callee Saved Registers
+const unsigned* PIC16RegisterInfo::
+getCalleeSavedRegs(const MachineFunction *MF) const {
+  static const unsigned CalleeSavedRegs[] = { 0 };
+  return CalleeSavedRegs;
+}
+
+// PIC16 Callee Saved Reg Classes
+const TargetRegisterClass* const*
+PIC16RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
+  static const TargetRegisterClass * const CalleeSavedRegClasses[] = { 0 };
+  return CalleeSavedRegClasses;
+}
+
+BitVector PIC16RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
+  BitVector Reserved(getNumRegs());
+  return Reserved;
+}
+
+bool PIC16RegisterInfo::hasFP(const MachineFunction &MF) const {
+  return false;
+}
+
+unsigned PIC16RegisterInfo::
+eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj,
+                    int *Value, RegScavenger *RS) const
+{
+  /* NOT YET IMPLEMENTED */
+  return 0;
+}
+
+void PIC16RegisterInfo::emitPrologue(MachineFunction &MF) const
+{    /* NOT YET IMPLEMENTED */  }
+
+void PIC16RegisterInfo::
+emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const
+{    /* NOT YET IMPLEMENTED */  }
+
+int PIC16RegisterInfo::
+getDwarfRegNum(unsigned RegNum, bool isEH) const {
+  llvm_unreachable("Not keeping track of debug information yet!!");
+  return -1;
+}
+
+unsigned PIC16RegisterInfo::getFrameRegister(const MachineFunction &MF) const {
+  llvm_unreachable("PIC16 Does not have any frame register");
+  return 0;
+}
+
+unsigned PIC16RegisterInfo::getRARegister() const {
+  llvm_unreachable("PIC16 Does not have any return address register");
+  return 0;
+}
+
+// This function eliminates ADJCALLSTACKDOWN,
+// ADJCALLSTACKUP pseudo instructions
+void PIC16RegisterInfo::
+eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
+                              MachineBasicBlock::iterator I) const {
+  // Simply discard ADJCALLSTACKDOWN,
+  // ADJCALLSTACKUP instructions.
+  MBB.erase(I);
+}
+