diff options
| -rw-r--r-- | lib/CodeGen/RegisterCoalescer.cpp | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp index 9a5d19e737..a54323c7bc 100644 --- a/lib/CodeGen/RegisterCoalescer.cpp +++ b/lib/CodeGen/RegisterCoalescer.cpp @@ -935,13 +935,10 @@ RegisterCoalescer::UpdateRegDefsUses(const CoalescerPair &CP) { SmallVector<unsigned,8> Ops; bool Reads, Writes; tie(Reads, Writes) = UseMI->readsWritesVirtualRegister(SrcReg, &Ops); - bool Kills = false, Deads = false; // Replace SrcReg with DstReg in all UseMI operands. for (unsigned i = 0, e = Ops.size(); i != e; ++i) { MachineOperand &MO = UseMI->getOperand(Ops[i]); - Kills |= MO.isKill(); - Deads |= MO.isDead(); // Make sure we don't create read-modify-write defs accidentally. We // assume here that a SrcReg def cannot be joined into a live DstReg. If @@ -961,19 +958,6 @@ RegisterCoalescer::UpdateRegDefsUses(const CoalescerPair &CP) { if (JoinedCopies.count(UseMI)) continue; - if (SubIdx) { - // If UseMI was a simple SrcReg def, make sure we didn't turn it into a - // read-modify-write of DstReg. - if (Deads) - UseMI->addRegisterDead(DstReg, TRI); - else if (!Reads && Writes) - UseMI->addRegisterDefined(DstReg, TRI); - - // Kill flags apply to the whole physical register. - if (DstIsPhys && Kills) - UseMI->addRegisterKilled(DstReg, TRI); - } - DEBUG({ dbgs() << "\t\tupdated: "; if (!UseMI->isDebugValue()) |