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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157662 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp
index 75ae5b9..00ea3c5 100644
--- a/lib/CodeGen/IfConversion.cpp
+++ b/lib/CodeGen/IfConversion.cpp
@@ -993,7 +993,8 @@
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)