diff options
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/PreAllocSplitting.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/CodeGen/PreAllocSplitting.cpp b/lib/CodeGen/PreAllocSplitting.cpp index dfff87a3d7..ef2cfdb982 100644 --- a/lib/CodeGen/PreAllocSplitting.cpp +++ b/lib/CodeGen/PreAllocSplitting.cpp @@ -1128,7 +1128,10 @@ PreAllocSplitting::SplitRegLiveIntervals(const TargetRegisterClass **RCs, // by the current barrier. SmallVector<LiveInterval*, 8> Intervals; for (const TargetRegisterClass **RC = RCs; *RC; ++RC) { - if (TII->IgnoreRegisterClassBarriers(*RC)) + // FIXME: If it's not safe to move any instruction that defines the barrier + // register class, then it means there are some special dependencies which + // codegen is not modelling. Ignore these barriers for now. + if (!TII->isSafeToMoveRegClassDefs(*RC)) continue; std::vector<unsigned> &VRs = MRI->getRegClassVirtRegs(*RC); for (unsigned i = 0, e = VRs.size(); i != e; ++i) { |