diff options
| -rw-r--r-- | lib/CodeGen/CGCall.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp index d0122fa4f9..02e00558d8 100644 --- a/lib/CodeGen/CGCall.cpp +++ b/lib/CodeGen/CGCall.cpp @@ -1760,6 +1760,18 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo, if (const llvm::Function *F = dyn_cast<llvm::Function>(Callee)) CI->setCallingConv(F->getCallingConv()); + + // If the call doesn't return, finish the basic block and clear the + // insertion point; this allows the rest of IRgen to discard + // unreachable code. + if (CI->doesNotReturn()) { + Builder.CreateUnreachable(); + Builder.ClearInsertionPoint(); + + // Return a reasonable RValue. + return GetUndefRValue(RetTy); + } + if (CI->getType() != llvm::Type::VoidTy) CI->setName("call"); |