diff options
Diffstat (limited to 'llvm/lib/CodeGen/StackColoring.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/StackColoring.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/StackColoring.cpp b/llvm/lib/CodeGen/StackColoring.cpp index 4f3d1f704aa..0bd941e64aa 100644 --- a/llvm/lib/CodeGen/StackColoring.cpp +++ b/llvm/lib/CodeGen/StackColoring.cpp @@ -782,8 +782,11 @@ void StackColoring::calculateLocalLiveness() { for (MachineBasicBlock::const_pred_iterator PI = BB->pred_begin(), PE = BB->pred_end(); PI != PE; ++PI) { LivenessMap::const_iterator I = BlockLiveness.find(*PI); - assert(I != BlockLiveness.end() && "Predecessor not found"); - LocalLiveIn |= I->second.LiveOut; + // PR37130: transformations prior to stack coloring can + // sometimes leave behind statically unreachable blocks; these + // can be safely skipped here. + if (I != BlockLiveness.end()) + LocalLiveIn |= I->second.LiveOut; } // Compute LiveOut by subtracting out lifetimes that end in this |
