diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp b/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp index 19efa59..ec7bf31 100644 --- a/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp +++ b/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp @@ -382,6 +382,11 @@ void MipsSEFrameLowering::emitPrologue(MachineFunction &MF, unsigned FP = ABI.GetFramePtr(); unsigned ZERO = ABI.GetNullPtr(); unsigned ADDu = ABI.GetPtrAdduOp(); + unsigned ADDiu = ABI.GetPtrAddiuOp(); + unsigned AND = ABI.IsN64() ? Mips::AND64 : Mips::AND; + + const TargetRegisterClass *RC = ABI.ArePtrs64bit() ? + &Mips::GPR64RegClass : &Mips::GPR32RegClass; // First, compute final stack size. uint64_t StackSize = MFI->getStackSize(); @@ -464,15 +469,12 @@ void MipsSEFrameLowering::emitPrologue(MachineFunction &MF, } if (MipsFI->callsEhReturn()) { - 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(ABI.GetEhDataReg(I))) MBB.addLiveIn(ABI.GetEhDataReg(I)); TII.storeRegToStackSlot(MBB, MBBI, ABI.GetEhDataReg(I), false, - MipsFI->getEhDataRegFI(I), PtrRC, &RegInfo); + MipsFI->getEhDataRegFI(I), RC, &RegInfo); } // Emit .cfi_offset directives for eh data registers. @@ -497,6 +499,26 @@ void MipsSEFrameLowering::emitPrologue(MachineFunction &MF, nullptr, MRI->getDwarfRegNum(FP, true))); BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION)) .addCFIIndex(CFIIndex); + + if (RegInfo.needsStackRealignment(MF)) { + // addiu $Reg, $zero, -MaxAlignment + // andi $sp, $sp, $Reg + unsigned VR = MF.getRegInfo().createVirtualRegister(RC); + assert(isInt<16>(MFI->getMaxAlignment()) && + "Function's alignment size requirement is not supported."); + int MaxAlign = - (signed) MFI->getMaxAlignment(); + + BuildMI(MBB, MBBI, dl, TII.get(ADDiu), VR).addReg(ZERO) .addImm(MaxAlign); + BuildMI(MBB, MBBI, dl, TII.get(AND), SP).addReg(SP).addReg(VR); + + if (hasBP(MF)) { + // move $s7, $sp + unsigned BP = STI.isABI_N64() ? Mips::S7_64 : Mips::S7; + BuildMI(MBB, MBBI, dl, TII.get(ADDu), BP) + .addReg(SP) + .addReg(ZERO); + } + } } } @@ -606,10 +628,14 @@ processFunctionBeforeCalleeSavedScan(MachineFunction &MF, MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>(); MipsABIInfo ABI = STI.getABI(); unsigned FP = ABI.GetFramePtr(); + unsigned BP = ABI.IsN64() ? Mips::S7_64 : Mips::S7; // Mark $fp as used if function has dedicated frame pointer. if (hasFP(MF)) MRI.setPhysRegUsed(FP); + // Mark $s7 as used if function has dedicated base pointer. + if (hasBP(MF)) + MRI.setPhysRegUsed(BP); // Create spill slots for eh data registers if function calls eh_return. if (MipsFI->callsEhReturn()) |