diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 52e07e049a0..290f4151c0a 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -5275,8 +5275,12 @@ static bool SwitchToLookupTable(SwitchInst *SI, IRBuilder<> &Builder, // Compute the table index value. Builder.SetInsertPoint(SI); - Value *TableIndex = - Builder.CreateSub(SI->getCondition(), MinCaseVal, "switch.tableidx"); + Value *TableIndex; + if (MinCaseVal->isNullValue()) + TableIndex = SI->getCondition(); + else + TableIndex = Builder.CreateSub(SI->getCondition(), MinCaseVal, + "switch.tableidx"); // Compute the maximum table size representable by the integer type we are // switching upon. |
