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Create the virtual register for the global base in the intersection of 

GPRC and GPRC_NOR0 (or the 64bit equivalent) and not just the latter.
GPRC_NOR0 contains ZERO as alternative meaning of r0 and is therefore
not a true subclass of GPRC.

llvm-svn: 285813
This commit is contained in:
Joerg Sonnenberger 2016-11-02 15:00:31 +00:00
parent b39cacf2a9
commit bef3621ad0
1 changed files with 2 additions and 2 deletions
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4
llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@ -334,12 +334,12 @@ SDNode *PPCDAGToDAGISel::getGlobalBaseReg() {
}
} else {
GlobalBaseReg =
RegInfo->createVirtualRegister(&PPC::GPRC_NOR0RegClass);
RegInfo->createVirtualRegister(&PPC::GPRC_and_GPRC_NOR0RegClass);
BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR));
BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg);
}
} else {
GlobalBaseReg = RegInfo->createVirtualRegister(&PPC::G8RC_NOX0RegClass);
GlobalBaseReg = RegInfo->createVirtualRegister(&PPC::G8RC_and_G8RC_NOX0RegClass);
BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR8));
BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR8), GlobalBaseReg);
}