-//===- SystemZInstrBuilder.h - Functions to aid building insts -*- C++ -*-===//
+//===-- SystemZInstrBuilder.h - Functions to aid building insts -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file exposes functions that may be used with BuildMI from the
// MachineInstrBuilder.h file to handle SystemZ'isms in a clean way.
//
-// The BuildMem function may be used with the BuildMI function to add entire
-// memory references in a single, typed, function call.
-//
-// For reference, the order of operands for memory references is:
-// (Operand), Base, Displacement, Index.
-//
//===----------------------------------------------------------------------===//
#ifndef SYSTEMZINSTRBUILDER_H
namespace llvm {
-/// SystemZAddressMode - This struct holds a generalized full x86 address mode.
-/// The base register can be a frame index, which will eventually be replaced
-/// with R15 or R11 and Disp being offsetted accordingly.
-struct SystemZAddressMode {
- enum {
- RegBase,
- FrameIndexBase
- } BaseType;
-
- union {
- unsigned Reg;
- int FrameIndex;
- } Base;
-
- unsigned IndexReg;
- int32_t Disp;
- const GlobalValue *GV;
-
- SystemZAddressMode() : BaseType(RegBase), IndexReg(0), Disp(0) {
- Base.Reg = 0;
- }
-};
-
-/// addDirectMem - This function is used to add a direct memory reference to the
-/// current instruction -- that is, a dereference of an address in a register,
-/// with no index or displacement.
-///
-static inline const MachineInstrBuilder &
-addDirectMem(const MachineInstrBuilder &MIB, unsigned Reg) {
- // Because memory references are always represented with 3
- // values, this adds: Reg, [0, NoReg] to the instruction.
- return MIB.addReg(Reg).addImm(0).addReg(0);
-}
-
-static inline const MachineInstrBuilder &
-addOffset(const MachineInstrBuilder &MIB, int Offset) {
- return MIB.addImm(Offset).addReg(0);
-}
-
-/// addRegOffset - This function is used to add a memory reference of the form
-/// [Reg + Offset], i.e., one with no or index, but with a
-/// displacement. An example is: 10(%r15).
-///
-static inline const MachineInstrBuilder &
-addRegOffset(const MachineInstrBuilder &MIB,
- unsigned Reg, bool isKill, int Offset) {
- return addOffset(MIB.addReg(Reg, getKillRegState(isKill)), Offset);
-}
-
-/// addRegReg - This function is used to add a memory reference of the form:
-/// [Reg + Reg].
-static inline const MachineInstrBuilder &
-addRegReg(const MachineInstrBuilder &MIB,
- unsigned Reg1, bool isKill1, unsigned Reg2, bool isKill2) {
- return MIB.addReg(Reg1, getKillRegState(isKill1)).addImm(0)
- .addReg(Reg2, getKillRegState(isKill2));
-}
-
-static inline const MachineInstrBuilder &
-addFullAddress(const MachineInstrBuilder &MIB, const SystemZAddressMode &AM) {
- if (AM.BaseType == SystemZAddressMode::RegBase)
- MIB.addReg(AM.Base.Reg);
- else if (AM.BaseType == SystemZAddressMode::FrameIndexBase)
- MIB.addFrameIndex(AM.Base.FrameIndex);
- else
- assert(0);
-
- return MIB.addImm(AM.Disp).addReg(AM.IndexReg);
-}
-
-/// addFrameReference - This function is used to add a reference to the base of
-/// an abstract object on the stack frame of the current function. This
-/// reference has base register as the FrameIndex offset until it is resolved.
-/// This allows a constant offset to be specified as well...
-///
+/// Add a BDX memory reference for frame object FI to MIB.
static inline const MachineInstrBuilder &
-addFrameReference(const MachineInstrBuilder &MIB, int FI, int Offset = 0) {
+addFrameReference(const MachineInstrBuilder &MIB, int FI) {
MachineInstr *MI = MIB;
MachineFunction &MF = *MI->getParent()->getParent();
- MachineFrameInfo &MFI = *MF.getFrameInfo();
+ 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, MFI.getObjectSize(FI),
- MFI.getObjectAlignment(FI));
- return addOffset(MIB.addFrameIndex(FI), Offset)
- .addMemOperand(MMO);
+ PseudoSourceValue::getFixedStack(FI), Offset),
+ Flags, MFFrame->getObjectSize(FI),
+ MFFrame->getObjectAlignment(FI));
+ return MIB.addFrameIndex(FI).addImm(Offset).addReg(0).addMemOperand(MMO);
}
} // End llvm namespace