From bf18939180afcd8d0c8c422f86b170e036544be6 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Tue, 17 Feb 2009 06:41:03 +0000 Subject: A couple of places where reused use operands should be marked kill. This is exposed by recent availability fallthrough changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64745 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/VirtRegMap.cpp | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'lib/CodeGen/VirtRegMap.cpp') diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index f288dcc..e2dc636 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -1599,6 +1599,12 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM, PotentialDeadStoreSlots.push_back(ReuseSlot); } + + // Assumes this is the last use. IsKill will be unset if reg is reused + // unless it's a two-address operand. + if (ti == -1) + MI.getOperand(i).setIsKill(); + continue; } // CanReuse @@ -1764,6 +1770,11 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM, DefMO = NextMII->findRegisterDefOperand(DestReg); DefMO->setSubReg(SubIdx); } + + // Mark is killed. + MachineOperand *KillOpnd = NextMII->findRegisterUseOperand(InReg); + KillOpnd->setIsKill(); + BackTracked = true; } else { DOUT << "Removing now-noop copy: " << MI; -- cgit v1.1