X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsSEFrameLowering.cpp;h=19efa59e1fdfb2d7be27ba04f1243a54bf13d12d;hb=872808e946f3f8be1b30a6672697c2ba8e12f9e1;hp=7c79c4c564a7d592239f755b3ef56af02dab70b3;hpb=2d64c553b4486e7a2e30749bd0e76c0d984558a5;p=oota-llvm.git

diff --git a/lib/Target/Mips/MipsSEFrameLowering.cpp b/lib/Target/Mips/MipsSEFrameLowering.cpp
index 7c79c4c564a..19efa59e1fd 100644
--- a/lib/Target/Mips/MipsSEFrameLowering.cpp
+++ b/lib/Target/Mips/MipsSEFrameLowering.cpp
@@ -364,19 +364,9 @@ bool ExpandPseudo::expandExtractElementF64(MachineBasicBlock &MBB,
 MipsSEFrameLowering::MipsSEFrameLowering(const MipsSubtarget &STI)
     : MipsFrameLowering(STI, STI.stackAlignment()) {}
 
-unsigned MipsSEFrameLowering::ehDataReg(unsigned I) const {
-  static const unsigned EhDataReg[] = {
-    Mips::A0, Mips::A1, Mips::A2, Mips::A3
-  };
-  static const unsigned EhDataReg64[] = {
-    Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64
-  };
-
-  return STI.isABI_N64() ? EhDataReg64[I] : EhDataReg[I];
-}
-
-void MipsSEFrameLowering::emitPrologue(MachineFunction &MF) const {
-  MachineBasicBlock &MBB   = MF.front();
+void MipsSEFrameLowering::emitPrologue(MachineFunction &MF,
+                                       MachineBasicBlock &MBB) const {
+  assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
   MachineFrameInfo *MFI    = MF.getFrameInfo();
   MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
 
@@ -387,10 +377,11 @@ void MipsSEFrameLowering::emitPrologue(MachineFunction &MF) const {
 
   MachineBasicBlock::iterator MBBI = MBB.begin();
   DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
-  unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
-  unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
-  unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
-  unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
+  MipsABIInfo ABI = STI.getABI();
+  unsigned SP = ABI.GetStackPtr();
+  unsigned FP = ABI.GetFramePtr();
+  unsigned ZERO = ABI.GetNullPtr();
+  unsigned ADDu = ABI.GetPtrAdduOp();
 
   // First, compute final stack size.
   uint64_t StackSize = MFI->getStackSize();
@@ -473,21 +464,21 @@ void MipsSEFrameLowering::emitPrologue(MachineFunction &MF) const {
   }
 
   if (MipsFI->callsEhReturn()) {
-    const TargetRegisterClass *RC = STI.isABI_N64() ?
-        &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+    const TargetRegisterClass *PtrRC =
+        ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
 
     // Insert instructions that spill eh data registers.
     for (int I = 0; I < 4; ++I) {
-      if (!MBB.isLiveIn(ehDataReg(I)))
-        MBB.addLiveIn(ehDataReg(I));
-      TII.storeRegToStackSlot(MBB, MBBI, ehDataReg(I), false,
-                              MipsFI->getEhDataRegFI(I), RC, &RegInfo);
+      if (!MBB.isLiveIn(ABI.GetEhDataReg(I)))
+        MBB.addLiveIn(ABI.GetEhDataReg(I));
+      TII.storeRegToStackSlot(MBB, MBBI, ABI.GetEhDataReg(I), false,
+                              MipsFI->getEhDataRegFI(I), PtrRC, &RegInfo);
     }
 
     // Emit .cfi_offset directives for eh data registers.
     for (int I = 0; I < 4; ++I) {
       int64_t Offset = MFI->getObjectOffset(MipsFI->getEhDataRegFI(I));
-      unsigned Reg = MRI->getDwarfRegNum(ehDataReg(I), true);
+      unsigned Reg = MRI->getDwarfRegNum(ABI.GetEhDataReg(I), true);
       unsigned CFIIndex = MMI.addFrameInst(
           MCCFIInstruction::createOffset(nullptr, Reg, Offset));
       BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
@@ -521,10 +512,11 @@ void MipsSEFrameLowering::emitEpilogue(MachineFunction &MF,
       *static_cast<const MipsRegisterInfo *>(STI.getRegisterInfo());
 
   DebugLoc dl = MBBI->getDebugLoc();
-  unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
-  unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
-  unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
-  unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
+  MipsABIInfo ABI = STI.getABI();
+  unsigned SP = ABI.GetStackPtr();
+  unsigned FP = ABI.GetFramePtr();
+  unsigned ZERO = ABI.GetNullPtr();
+  unsigned ADDu = ABI.GetPtrAdduOp();
 
   // if framepointer enabled, restore the stack pointer.
   if (hasFP(MF)) {
@@ -539,8 +531,8 @@ void MipsSEFrameLowering::emitEpilogue(MachineFunction &MF,
   }
 
   if (MipsFI->callsEhReturn()) {
-    const TargetRegisterClass *RC = STI.isABI_N64() ?
-        &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+    const TargetRegisterClass *RC =
+        ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
 
     // Find first instruction that restores a callee-saved register.
     MachineBasicBlock::iterator I = MBBI;
@@ -549,8 +541,8 @@ void MipsSEFrameLowering::emitEpilogue(MachineFunction &MF,
 
     // Insert instructions that restore eh data registers.
     for (int J = 0; J < 4; ++J) {
-      TII.loadRegFromStackSlot(MBB, I, ehDataReg(J), MipsFI->getEhDataRegFI(J),
-                               RC, &RegInfo);
+      TII.loadRegFromStackSlot(MBB, I, ABI.GetEhDataReg(J),
+                               MipsFI->getEhDataRegFI(J), RC, &RegInfo);
     }
   }
 
@@ -607,32 +599,13 @@ MipsSEFrameLowering::hasReservedCallFrame(const MachineFunction &MF) const {
     !MFI->hasVarSizedObjects();
 }
 
-// Eliminate ADJCALLSTACKDOWN, ADJCALLSTACKUP pseudo instructions
-void MipsSEFrameLowering::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
-                              MachineBasicBlock::iterator I) const {
-  const MipsSEInstrInfo &TII =
-      *static_cast<const MipsSEInstrInfo *>(STI.getInstrInfo());
-
-  if (!hasReservedCallFrame(MF)) {
-    int64_t Amount = I->getOperand(0).getImm();
-
-    if (I->getOpcode() == Mips::ADJCALLSTACKDOWN)
-      Amount = -Amount;
-
-    unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
-    TII.adjustStackPtr(SP, Amount, MBB, I);
-  }
-
-  MBB.erase(I);
-}
-
 void MipsSEFrameLowering::
 processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
                                      RegScavenger *RS) const {
   MachineRegisterInfo &MRI = MF.getRegInfo();
   MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
-  unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
+  MipsABIInfo ABI = STI.getABI();
+  unsigned FP = ABI.GetFramePtr();
 
   // Mark $fp as used if function has dedicated frame pointer.
   if (hasFP(MF))
@@ -661,8 +634,8 @@ processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
   if (isInt<16>(MaxSPOffset))
     return;
 
-  const TargetRegisterClass *RC = STI.isABI_N64() ?
-    &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+  const TargetRegisterClass *RC =
+      ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
   int FI = MF.getFrameInfo()->CreateStackObject(RC->getSize(),
                                                 RC->getAlignment(), false);
   RS->addScavengingFrameIndex(FI);