vendor/llvm/llvm-release_33-r183502

1 files changed, 48 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZInstrBuilder.h b/lib/Target/SystemZ/SystemZInstrBuilder.h
new file mode 100644
index 000000000000..fb699b9ab8d7
--- /dev/null
+++ b/lib/Target/SystemZ/SystemZInstrBuilder.h
@@ -0,0 +1,48 @@
+//===-- SystemZInstrBuilder.h - Functions to aid building insts -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file exposes functions that may be used with BuildMI from the
+// MachineInstrBuilder.h file to handle SystemZ'isms in a clean way.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SYSTEMZINSTRBUILDER_H
+#define SYSTEMZINSTRBUILDER_H
+
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
+
+namespace llvm {
+
+/// Add a BDX memory reference for frame object FI to MIB.
+static inline const MachineInstrBuilder &
+addFrameReference(const MachineInstrBuilder &MIB, int FI) {
+  MachineInstr *MI = MIB;
+  MachineFunction &MF = *MI->getParent()->getParent();
+  MachineFrameInfo *MFFrame = MF.getFrameInfo();
+  const MCInstrDesc &MCID = MI->getDesc();
+  unsigned Flags = 0;
+  if (MCID.mayLoad())
+    Flags |= MachineMemOperand::MOLoad;
+  if (MCID.mayStore())
+    Flags |= MachineMemOperand::MOStore;
+  int64_t Offset = 0;
+  MachineMemOperand *MMO =
+    MF.getMachineMemOperand(MachinePointerInfo(
+                              PseudoSourceValue::getFixedStack(FI), Offset),
+                            Flags, MFFrame->getObjectSize(FI),
+                            MFFrame->getObjectAlignment(FI));
+  return MIB.addFrameIndex(FI).addImm(Offset).addReg(0).addMemOperand(MMO);
+}
+
+} // End llvm namespace
+
+#endif