From f9dff0e0e4e8aa9fd99c5f069e431fe6de98c1c9 Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Thu, 6 Sep 2012 18:15:15 +0000 Subject: [PATCH] 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(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163334 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveRangeCalc.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/lib/CodeGen/LiveRangeCalc.cpp b/lib/CodeGen/LiveRangeCalc.cpp index d828f25932e..c3ff4f1b6d2 100644 --- a/lib/CodeGen/LiveRangeCalc.cpp +++ b/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