diff options
Diffstat (limited to 'llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp b/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp index 0d78e39b3828..dc2d61a6e474 100644 --- a/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp +++ b/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp @@ -291,18 +291,15 @@ void LoongArchFrameLowering::emitPrologue(MachineFunction &MF, if (hasFP(MF)) { // Realign stack. if (RI->hasStackRealignment(MF)) { - unsigned ShiftAmount = Log2(MFI.getMaxAlign()); - Register VR = - MF.getRegInfo().createVirtualRegister(&LoongArch::GPRRegClass); + unsigned Align = Log2(MFI.getMaxAlign()); + assert(Align > 0 && "The stack realignment size is invalid!"); BuildMI(MBB, MBBI, DL, - TII->get(IsLA64 ? LoongArch::SRLI_D : LoongArch::SRLI_W), VR) + TII->get(IsLA64 ? LoongArch::BSTRINS_D : LoongArch::BSTRINS_W), + SPReg) .addReg(SPReg) - .addImm(ShiftAmount) - .setMIFlag(MachineInstr::FrameSetup); - BuildMI(MBB, MBBI, DL, - TII->get(IsLA64 ? LoongArch::SLLI_D : LoongArch::SLLI_W), SPReg) - .addReg(VR) - .addImm(ShiftAmount) + .addReg(LoongArch::R0) + .addImm(Align - 1) + .addImm(0) .setMIFlag(MachineInstr::FrameSetup); // FP will be used to restore the frame in the epilogue, so we need // another base register BP to record SP after re-alignment. SP will |