diff options
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp index 1e80718ebe..f9cf4142f3 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -355,6 +355,22 @@ static void HandleVRSaveUpdate(MachineInstr *MI, const bool *UsedRegs) { if (UsedRegs[VRRegNo[i]]) UsedRegMask |= 1 << (31-i); + // Live in and live out values already must be in the mask, so don't bother + // marking them. + MachineFunction *MF = MI->getParent()->getParent(); + for (MachineFunction::livein_iterator I = + MF->livein_begin(), E = MF->livein_end(); I != E; ++I) { + unsigned RegNo = PPCRegisterInfo::getRegisterNumbering(I->first); + if (VRRegNo[RegNo] == I->first) // If this really is a vector reg. + UsedRegMask &= ~(1 << (31-RegNo)); // Doesn't need to be marked. + } + for (MachineFunction::liveout_iterator I = + MF->liveout_begin(), E = MF->liveout_end(); I != E; ++I) { + unsigned RegNo = PPCRegisterInfo::getRegisterNumbering(*I); + if (VRRegNo[RegNo] == *I) // If this really is a vector reg. + UsedRegMask &= ~(1 << (31-RegNo)); // Doesn't need to be marked. + } + unsigned SrcReg = MI->getOperand(1).getReg(); unsigned DstReg = MI->getOperand(0).getReg(); // If no registers are used, turn this into a copy. |