Preserve <undef> flags in ARMExpandPseudo.
This probably mostly shows up in bugpoint-generated code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158527 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMExpandPseudoInsts.cpp b/lib/Target/ARM/ARMExpandPseudoInsts.cpp
index ac9163f..a242b13 100644
--- a/lib/Target/ARM/ARMExpandPseudoInsts.cpp
+++ b/lib/Target/ARM/ARMExpandPseudoInsts.cpp
@@ -459,22 +459,23 @@
MIB.addOperand(MI.getOperand(OpIdx++));
bool SrcIsKill = MI.getOperand(OpIdx).isKill();
+ bool SrcIsUndef = MI.getOperand(OpIdx).isUndef();
unsigned SrcReg = MI.getOperand(OpIdx++).getReg();
unsigned D0, D1, D2, D3;
GetDSubRegs(SrcReg, RegSpc, TRI, D0, D1, D2, D3);
- MIB.addReg(D0);
+ MIB.addReg(D0, getUndefRegState(SrcIsUndef));
if (NumRegs > 1 && TableEntry->copyAllListRegs)
- MIB.addReg(D1);
+ MIB.addReg(D1, getUndefRegState(SrcIsUndef));
if (NumRegs > 2 && TableEntry->copyAllListRegs)
- MIB.addReg(D2);
+ MIB.addReg(D2, getUndefRegState(SrcIsUndef));
if (NumRegs > 3 && TableEntry->copyAllListRegs)
- MIB.addReg(D3);
+ MIB.addReg(D3, getUndefRegState(SrcIsUndef));
// Copy the predicate operands.
MIB.addOperand(MI.getOperand(OpIdx++));
MIB.addOperand(MI.getOperand(OpIdx++));
- if (SrcIsKill) // Add an implicit kill for the super-reg.
+ if (SrcIsKill && !SrcIsUndef) // Add an implicit kill for the super-reg.
MIB->addRegisterKilled(SrcReg, TRI, true);
TransferImpOps(MI, MIB, MIB);