From 8dfffd5a079c35e317b843f9f249d2fa36bcd944 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Mon, 14 May 2007 21:23:51 +0000 Subject: [PATCH] Only worry about intervening kill if there are more than one live ranges in the interval. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37052 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveIntervalAnalysis.cpp | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index a996aea4816..00c212d4b80 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1073,9 +1073,11 @@ bool LiveIntervals::JoinCopy(MachineInstr *CopyMI, // have clobbered values for this range. if (MRegisterInfo::isPhysicalRegister(repDstReg)) { // Unset unnecessary kills. - for (LiveInterval::Ranges::const_iterator I = SrcInt.begin(), - E = SrcInt.end(); I != E; ++I) - unsetRegisterKills(I->start, I->end, repDstReg); + if (!DstInt.containsOneValue()) { + for (LiveInterval::Ranges::const_iterator I = SrcInt.begin(), + E = SrcInt.end(); I != E; ++I) + unsetRegisterKills(I->start, I->end, repDstReg); + } // Update the liveintervals of sub-registers. for (const unsigned *AS = mri_->getSubRegisters(repDstReg); *AS; ++AS) -- 2.34.1