Avoid dereferencing off the beginning of lists.
authorEvan Cheng <evan.cheng@apple.com>
Mon, 14 Nov 2011 21:11:15 +0000 (21:11 +0000)
committerEvan Cheng <evan.cheng@apple.com>
Mon, 14 Nov 2011 21:11:15 +0000 (21:11 +0000)
commit8aee7d8f9eab71a29f8f3a5a541144bef4fb5ac4
treed614105281911e21261f66fc8540bd97e05c8913
parent41e00172c51a1666cbcda5df2c6f45d685068fbb
Avoid dereferencing off the beginning of lists.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144569 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/TwoAddressInstructionPass.cpp