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| author | Andrew Trick <atrick@apple.com> | 2013-06-21 18:33:11 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2013-06-21 18:33:11 +0000 |
| commit | ff197dfcf9ac50a62d21e0c30644e09ca3bb92f5 (patch) | |
| tree | af675abf8b8fbc9fe18254ae39d5fcd8560513dd /lib | |
| parent | 0db6df0d963a8eee763fd878a72c3153501491c0 (diff) | |
| download | llvm-ff197dfcf9ac50a62d21e0c30644e09ca3bb92f5.tar.gz llvm-ff197dfcf9ac50a62d21e0c30644e09ca3bb92f5.tar.bz2 llvm-ff197dfcf9ac50a62d21e0c30644e09ca3bb92f5.tar.xz | |
Fix a -join-globalcopies bug; handle undef operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184569 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/RegisterCoalescer.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp index 6e7d90dd65..70a2462880 100644 --- a/lib/CodeGen/RegisterCoalescer.cpp +++ b/lib/CodeGen/RegisterCoalescer.cpp @@ -2072,6 +2072,9 @@ static bool isLocalCopy(MachineInstr *Copy, const LiveIntervals *LIS) { if (!Copy->isCopy()) return false; + if (Copy->getOperand(1).isUndef()) + return false; + unsigned SrcReg = Copy->getOperand(1).getReg(); unsigned DstReg = Copy->getOperand(0).getReg(); if (TargetRegisterInfo::isPhysicalRegister(SrcReg) |