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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 | e1595b68592842dfa82b11f0d7e5ce8d08eb7646 (patch) | |
| tree | ce38257a1b6af40cf418f258e879d56a7afb5811 /llvm | |
| parent | 4c28ec187e8b96682dc4998bbe98511c08c14993 (diff) | |
| download | bcm5719-llvm-e1595b68592842dfa82b11f0d7e5ce8d08eb7646.tar.gz bcm5719-llvm-e1595b68592842dfa82b11f0d7e5ce8d08eb7646.zip | |
Only worry about intervening kill if there are more than one live ranges in the interval.
llvm-svn: 37052
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp index a996aea4816..00c212d4b80 100644 --- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/llvm/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) |
