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If-converter models predicated defs as read + write. The read should be marked as 'undef' since it may not already be live. This appeases -verify-machineinstrs.

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llvm-svn: 157662
This commit is contained in:
Evan Cheng 2012-05-30 00:42:02 +00:00
parent cb4786e569
commit 24d38da5af
1 changed files with 2 additions and 1 deletions
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3
lib/CodeGen/IfConversion.cpp
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@ -993,7 +993,8 @@ static void UpdatePredRedefs(MachineInstr *MI, SmallSet<unsigned,4> &Redefs,
if (AddImpUse)
// Treat predicated update as read + write.
MI->addOperand(MachineOperand::CreateReg(Reg, false/*IsDef*/,
true/*IsImp*/,false/*IsKill*/));
true/*IsImp*/,false/*IsKill*/,
false/*IsDead*/,true/*IsUndef*/));
} else {
Redefs.insert(Reg);
for (const uint16_t *SR = TRI->getSubRegisters(Reg); *SR; ++SR)