and so it begins...

PHASE 1: write instruction selector
PHASE 2: ???
PHASE 3: profit!

llvm-svn: 20652

1 files changed, 47 insertions, 0 deletions

diff --git a/llvm/lib/Target/IA64/IA64InstrInfo.cpp b/llvm/lib/Target/IA64/IA64InstrInfo.cpp
new file mode 100644
index 00000000000..04662baf2ce
--- /dev/null
+++ b/llvm/lib/Target/IA64/IA64InstrInfo.cpp
@@ -0,0 +1,47 @@
+//===- IA64InstrInfo.cpp - IA64 Instruction Information -----------*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains the IA64 implementation of the TargetInstrInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IA64InstrInfo.h"
+#include "IA64.h"
+#include "IA64InstrBuilder.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "IA64GenInstrInfo.inc"
+using namespace llvm;
+
+IA64InstrInfo::IA64InstrInfo()
+  : TargetInstrInfo(IA64Insts, sizeof(IA64Insts)/sizeof(IA64Insts[0])) {
+}
+
+
+bool IA64InstrInfo::isMoveInstr(const MachineInstr& MI,
+                               unsigned& sourceReg,
+                               unsigned& destReg) const {
+  MachineOpCode oc = MI.getOpcode();
+  if (oc == IA64::MOV || oc == IA64::FMOV) {
+     assert(MI.getNumOperands() == 2 &&
+             /* MI.getOperand(0).isRegister() &&
+             MI.getOperand(1).isRegister() && */
+             "invalid register-register move instruction");
+     if( MI.getOperand(0).isRegister() &&
+	 MI.getOperand(1).isRegister() ) {
+       // if both operands of the MOV/FMOV are registers, then
+       // yes, this is a move instruction
+       sourceReg = MI.getOperand(1).getReg();
+       destReg = MI.getOperand(0).getReg();
+       return true;
+     }
+  }
+  return false; // we don't consider e.g. %regN = MOV <FrameIndex #x> a
+                // move instruction
+}
+