From 81f69410cb942079964481aba8d1c4739b77290f Mon Sep 17 00:00:00 2001 From: Andrew Trick Date: Wed, 16 Oct 2013 18:30:23 +0000 Subject: [PATCH] After PostRA scheduling, don't set kill flags on undef operands. This should fix the ATOM buildbot failing on break-avx-dep.ll. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192824 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/PostRASchedulerList.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp index b8747b9330b..1afc1eca00a 100644 --- a/lib/CodeGen/PostRASchedulerList.cpp +++ b/lib/CodeGen/PostRASchedulerList.cpp @@ -515,11 +515,11 @@ void SchedulePostRATDList::FixupKills(MachineBasicBlock *MBB) { // Examine all used registers and set/clear kill flag. When a // register is used multiple times we only set the kill flag on - // the first use. + // the first use. Don't set kill flags on undef operands. killedRegs.reset(); for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { MachineOperand &MO = MI->getOperand(i); - if (!MO.isReg() || !MO.isUse()) continue; + if (!MO.isReg() || !MO.isUse() || MO.isUndef()) continue; unsigned Reg = MO.getReg(); if ((Reg == 0) || MRI.isReserved(Reg)) continue;