diff options
| author | Duncan Sands <baldrick@free.fr> | 2009-01-20 09:05:19 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2009-01-20 09:05:19 +0000 |
| commit | f90fb345db46faf25240e066f41025e009b09768 (patch) | |
| tree | d870749871ddf5664479760be9714390827dcf11 | |
| parent | e08eb9ca1dc832e0c8b460459fe218622f231898 (diff) | |
If a vector is empty, you're not allowed to access any
elements, even if it is only to take the address. Test:
break-anti-dependencies.ll with ENABLE_EXPENSIVE_CHECKS.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62576 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | include/llvm/CodeGen/ScheduleDAGInstrs.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/llvm/CodeGen/ScheduleDAGInstrs.h b/include/llvm/CodeGen/ScheduleDAGInstrs.h index 2e5d833635..7c0e80afe4 100644 --- a/include/llvm/CodeGen/ScheduleDAGInstrs.h +++ b/include/llvm/CodeGen/ScheduleDAGInstrs.h @@ -49,10 +49,11 @@ namespace llvm { /// SUnit *NewSUnit(MachineInstr *MI) { #ifndef NDEBUG - const SUnit *Addr = &SUnits[0]; + const SUnit *Addr = SUnits.empty() ? 0 : &SUnits[0]; #endif SUnits.push_back(SUnit(MI, (unsigned)SUnits.size())); - assert(Addr == &SUnits[0] && "SUnits std::vector reallocated on the fly!"); + assert((Addr == 0 || Addr == &SUnits[0]) && + "SUnits std::vector reallocated on the fly!"); SUnits.back().OrigNode = &SUnits.back(); return &SUnits.back(); } |