From 4aed470376b6e7448f830838b9e58fe8d91c2af2 Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Thu, 6 Sep 2012 18:15:15 +0000 Subject: Clear kill flags while computing live ranges. Kill flags are difficult to maintain, and liveness queries are better handled by live intervals. Kill flags are reinserted after register allocation by addKillFlags(). llvm-svn: 163334 --- llvm/lib/CodeGen/LiveRangeCalc.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'llvm/lib/CodeGen/LiveRangeCalc.cpp') diff --git a/llvm/lib/CodeGen/LiveRangeCalc.cpp b/llvm/lib/CodeGen/LiveRangeCalc.cpp index d828f25932e..c3ff4f1b6d2 100644 --- a/llvm/lib/CodeGen/LiveRangeCalc.cpp +++ b/llvm/lib/CodeGen/LiveRangeCalc.cpp @@ -65,7 +65,11 @@ void LiveRangeCalc::extendToUses(LiveInterval *LI, unsigned Reg) { // Visit all operands that read Reg. This may include partial defs. for (MachineRegisterInfo::reg_nodbg_iterator I = MRI->reg_nodbg_begin(Reg), E = MRI->reg_nodbg_end(); I != E; ++I) { - const MachineOperand &MO = I.getOperand(); + MachineOperand &MO = I.getOperand(); + // Clear all kill flags. They will be reinserted after register allocation + // by LiveIntervalAnalysis::addKillFlags(). + if (MO.isUse()) + MO.setIsKill(false); if (!MO.readsReg()) continue; // MI is reading Reg. We may have visited MI before if it happens to be -- cgit v1.2.3