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When expanding NEON VST pseudo instructions, if the original super-register

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operand is killed, add it to the expanded instruction as an implicit kill
operand instead of marking the individual subregs with kill flags.  This
should work better in general and also handles the case for VST3 where one
of the subregs was not referenced in the expanded instruction and so was
not marked killed.

llvm-svn: 112494
This commit is contained in:
Bob Wilson 2010-08-30 18:10:48 +00:00
parent 6c5076f317
commit 2b83684be8
1 changed files with 6 additions and 4 deletions
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10
lib/Target/ARM/ARMExpandPseudoInsts.cpp
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@ -118,14 +118,16 @@ void ARMExpandPseudo::ExpandVST(MachineBasicBlock::iterator &MBBI,
D3 = TRI->getSubReg(SrcReg, ARM::dsub_7);
}
MIB.addReg(D0, getKillRegState(SrcIsKill))
.addReg(D1, getKillRegState(SrcIsKill));
MIB.addReg(D0).addReg(D1);
if (NumRegs > 2)
MIB.addReg(D2, getKillRegState(SrcIsKill));
MIB.addReg(D2);
if (NumRegs > 3)
MIB.addReg(D3, getKillRegState(SrcIsKill));
MIB.addReg(D3);
MIB = AddDefaultPred(MIB);
TransferImpOps(MI, MIB, MIB);
if (SrcIsKill)
// Add an implicit kill for the super-reg.
(*MIB).addRegisterKilled(SrcReg, TRI, true);
MI.eraseFromParent();
}