From e6cd757e6800b9b94a6459ec148c0624c4f2e3c1 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Thu, 13 May 2010 20:34:42 +0000 Subject: Teach MachineLICM and MachineSink how to clear kill flags conservatively when they move instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103737 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineInstr.cpp | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'lib/CodeGen/MachineInstr.cpp') diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index 99b5beb136..d909fb0ef3 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -938,6 +938,16 @@ isRegTiedToDefOperand(unsigned UseOpIdx, unsigned *DefOpIdx) const { return true; } +/// clearKillInfo - Clears kill flags on all operands. +/// +void MachineInstr::clearKillInfo() { + for (unsigned i = 0, e = getNumOperands(); i != e; ++i) { + MachineOperand &MO = getOperand(i); + if (MO.isReg() && MO.isUse()) + MO.setIsKill(false); + } +} + /// copyKillDeadInfo - Copies kill / dead operand properties from MI. /// void MachineInstr::copyKillDeadInfo(const MachineInstr *MI) { -- cgit v1.2.3-18-g5258