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| author | Evan Cheng <evan.cheng@apple.com> | 2007-05-14 21:23:51 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-05-14 21:23:51 +0000 |
| commit | 8dfffd5a079c35e317b843f9f249d2fa36bcd944 (patch) | |
| tree | 00b3b456644b344107628a571098a3ecd3eaa2b6 /lib/CodeGen/LiveIntervalAnalysis.cpp | |
| parent | 0dbea33fff860b4d0df030ad9b29f70a2a58b4e1 (diff) | |
| download | external_llvm-8dfffd5a079c35e317b843f9f249d2fa36bcd944.zip external_llvm-8dfffd5a079c35e317b843f9f249d2fa36bcd944.tar.gz external_llvm-8dfffd5a079c35e317b843f9f249d2fa36bcd944.tar.bz2 | |
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
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index a996aea..00c212d 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) |