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| author | Evan Cheng <evan.cheng@apple.com> | 2012-06-26 22:54:59 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2012-06-26 22:54:59 +0000 |
| commit | d096479f31eb51bcbd418b6e852a34210141d80e (patch) | |
| tree | b784086630cc687d9fbf344177c6f2894a3b15fa /lib | |
| parent | bbbe41384650142ce57ec469c2342952ed13b69d (diff) | |
| download | llvm-d096479f31eb51bcbd418b6e852a34210141d80e.tar.gz llvm-d096479f31eb51bcbd418b6e852a34210141d80e.tar.bz2 llvm-d096479f31eb51bcbd418b6e852a34210141d80e.tar.xz | |
Add a missing check to avoid dereference null. No sensible test case possible. Sorry. rdar://11745134
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159236 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index 58f4e160de..3a180dfa27 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1802,6 +1802,8 @@ static bool isSuitableForMask(MachineInstr *&MI, unsigned SrcReg, bool ARMBaseInstrInfo:: OptimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, int CmpMask, int CmpValue, const MachineRegisterInfo *MRI) const { + if (MRI->def_empty(SrcReg)) + return false; MachineRegisterInfo::def_iterator DI = MRI->def_begin(SrcReg); if (llvm::next(DI) != MRI->def_end()) |