-//===-- Mips16RegisterInfo.cpp - MIPS16 Register Information -== ----------===//
+//===-- Mips16RegisterInfo.cpp - MIPS16 Register Information --------------===//
//
// The LLVM Compiler Infrastructure
//
#include "Mips16RegisterInfo.h"
#include "Mips.h"
+#include "Mips16InstrInfo.h"
#include "MipsAnalyzeImmediate.h"
#include "MipsInstrInfo.h"
-#include "MipsSubtarget.h"
#include "MipsMachineFunction.h"
-#include "llvm/Constants.h"
-#include "llvm/DebugInfo.h"
-#include "llvm/Type.h"
-#include "llvm/Function.h"
-#include "llvm/CodeGen/ValueTypes.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineFunction.h"
+#include "MipsSubtarget.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/Target/TargetFrameLowering.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Type.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/BitVector.h"
-#include "llvm/ADT/STLExtras.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
-Mips16RegisterInfo::Mips16RegisterInfo(const MipsSubtarget &ST,
- const TargetInstrInfo &TII)
- : MipsRegisterInfo(ST, TII) {}
-
-// This function eliminate ADJCALLSTACKDOWN,
-// ADJCALLSTACKUP pseudo instructions
-void Mips16RegisterInfo::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- // Simply discard ADJCALLSTACKDOWN, ADJCALLSTACKUP instructions.
- MBB.erase(I);
+#define DEBUG_TYPE "mips16-registerinfo"
+
+Mips16RegisterInfo::Mips16RegisterInfo() : MipsRegisterInfo() {}
+
+bool Mips16RegisterInfo::requiresRegisterScavenging
+ (const MachineFunction &MF) const {
+ return false;
+}
+bool Mips16RegisterInfo::requiresFrameIndexScavenging
+ (const MachineFunction &MF) const {
+ return false;
+}
+
+bool Mips16RegisterInfo::useFPForScavengingIndex
+ (const MachineFunction &MF) const {
+ return false;
+}
+
+bool Mips16RegisterInfo::saveScavengerRegister
+ (MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ MachineBasicBlock::iterator &UseMI,
+ const TargetRegisterClass *RC,
+ unsigned Reg) const {
+ DebugLoc DL;
+ const TargetInstrInfo &TII = *MBB.getParent()->getSubtarget().getInstrInfo();
+ TII.copyPhysReg(MBB, I, DL, Mips::T0, Reg, true);
+ TII.copyPhysReg(MBB, UseMI, DL, Reg, Mips::T0, true);
+ return true;
+}
+
+const TargetRegisterClass *
+Mips16RegisterInfo::intRegClass(unsigned Size) const {
+ assert(Size == 4);
+ return &Mips::CPU16RegsRegClass;
}
void Mips16RegisterInfo::eliminateFI(MachineBasicBlock::iterator II,
unsigned OpNo, int FrameIndex,
uint64_t StackSize,
int64_t SPOffset) const {
- MachineInstr &MI = *II;
- MachineFunction &MF = *MI.getParent()->getParent();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
-
- const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
- int MinCSFI = 0;
- int MaxCSFI = -1;
-
- if (CSI.size()) {
- MinCSFI = CSI[0].getFrameIdx();
- MaxCSFI = CSI[CSI.size() - 1].getFrameIdx();
- }
-
- // The following stack frame objects are always
- // referenced relative to $sp:
- // 1. Outgoing arguments.
- // 2. Pointer to dynamically allocated stack space.
- // 3. Locations for callee-saved registers.
- // Everything else is referenced relative to whatever register
- // getFrameRegister() returns.
- unsigned FrameReg;
-
- if (MipsFI->isOutArgFI(FrameIndex) ||
- (FrameIndex >= MinCSFI && FrameIndex <= MaxCSFI))
- FrameReg = Subtarget.isABI_N64() ? Mips::SP_64 : Mips::SP;
- else
- FrameReg = getFrameRegister(MF);
-
- // Calculate final offset.
- // - There is no need to change the offset if the frame object
- // is one of the
- // following: an outgoing argument, pointer to a dynamically allocated
- // stack space or a $gp restore location,
- // - If the frame object is any of the following,
- // its offset must be adjusted
- // by adding the size of the stack:
- // incoming argument, callee-saved register location or local variable.
- int64_t Offset;
-
- if (MipsFI->isOutArgFI(FrameIndex))
- Offset = SPOffset;
+ MachineInstr &MI = *II;
+ MachineFunction &MF = *MI.getParent()->getParent();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+
+ const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
+ int MinCSFI = 0;
+ int MaxCSFI = -1;
+
+ if (CSI.size()) {
+ MinCSFI = CSI[0].getFrameIdx();
+ MaxCSFI = CSI[CSI.size() - 1].getFrameIdx();
+ }
+
+ // The following stack frame objects are always
+ // referenced relative to $sp:
+ // 1. Outgoing arguments.
+ // 2. Pointer to dynamically allocated stack space.
+ // 3. Locations for callee-saved registers.
+ // Everything else is referenced relative to whatever register
+ // getFrameRegister() returns.
+ unsigned FrameReg;
+
+ if (FrameIndex >= MinCSFI && FrameIndex <= MaxCSFI)
+ FrameReg = Mips::SP;
+ else {
+ const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
+ if (TFI->hasFP(MF)) {
+ FrameReg = Mips::S0;
+ }
+ else {
+ if ((MI.getNumOperands()> OpNo+2) && MI.getOperand(OpNo+2).isReg())
+ FrameReg = MI.getOperand(OpNo+2).getReg();
else
- Offset = SPOffset + (int64_t)StackSize;
-
- Offset += MI.getOperand(OpNo + 1).getImm();
-
- DEBUG(errs() << "Offset : " << Offset << "\n" << "<--------->\n");
-
- MI.getOperand(OpNo).ChangeToRegister(FrameReg, false);
- MI.getOperand(OpNo + 1).ChangeToImmediate(Offset);
+ FrameReg = Mips::SP;
+ }
+ }
+ // Calculate final offset.
+ // - There is no need to change the offset if the frame object
+ // is one of the
+ // following: an outgoing argument, pointer to a dynamically allocated
+ // stack space or a $gp restore location,
+ // - If the frame object is any of the following,
+ // its offset must be adjusted
+ // by adding the size of the stack:
+ // incoming argument, callee-saved register location or local variable.
+ int64_t Offset;
+ bool IsKill = false;
+ Offset = SPOffset + (int64_t)StackSize;
+ Offset += MI.getOperand(OpNo + 1).getImm();
+
+
+ DEBUG(errs() << "Offset : " << Offset << "\n" << "<--------->\n");
+
+ if (!MI.isDebugValue() &&
+ !Mips16InstrInfo::validImmediate(MI.getOpcode(), FrameReg, Offset)) {
+ MachineBasicBlock &MBB = *MI.getParent();
+ DebugLoc DL = II->getDebugLoc();
+ unsigned NewImm;
+ const Mips16InstrInfo &TII =
+ *static_cast<const Mips16InstrInfo *>(MF.getSubtarget().getInstrInfo());
+ FrameReg = TII.loadImmediate(FrameReg, Offset, MBB, II, DL, NewImm);
+ Offset = SignExtend64<16>(NewImm);
+ IsKill = true;
+ }
+ MI.getOperand(OpNo).ChangeToRegister(FrameReg, false, false, IsKill);
+ MI.getOperand(OpNo + 1).ChangeToImmediate(Offset);
}
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