From bb30dd40ed0873e39fec4dfa321091a0c8d1abfc Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Mon, 2 May 2011 05:29:58 +0000 Subject: Minimize the slot indexes spanned by register ranges created when splitting. When an interfering live range ends at a dead slot index between two instructions, make sure that the inserted copy instruction gets a slot index after the dead ones. This makes it possible to avoid the interference. Ideally, there shouldn't be interference ending at a deleted instruction, but physical register coalescing can sometimes do that to sub-registers. This fixes PR9823. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130687 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveRangeEdit.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'lib/CodeGen/LiveRangeEdit.cpp') diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp index 443cc2e904..f8a3dbb5fd 100644 --- a/lib/CodeGen/LiveRangeEdit.cpp +++ b/lib/CodeGen/LiveRangeEdit.cpp @@ -140,11 +140,13 @@ SlotIndex LiveRangeEdit::rematerializeAt(MachineBasicBlock &MBB, const Remat &RM, LiveIntervals &lis, const TargetInstrInfo &tii, - const TargetRegisterInfo &tri) { + const TargetRegisterInfo &tri, + bool Late) { assert(RM.OrigMI && "Invalid remat"); tii.reMaterialize(MBB, MI, DestReg, 0, RM.OrigMI, tri); rematted_.insert(RM.ParentVNI); - return lis.InsertMachineInstrInMaps(--MI).getDefIndex(); + return lis.getSlotIndexes()->insertMachineInstrInMaps(--MI, Late) + .getDefIndex(); } void LiveRangeEdit::eraseVirtReg(unsigned Reg, LiveIntervals &LIS) { -- cgit v1.2.3-70-g09d2