diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index a2658b3e3f..0d32eacbb1 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -10695,7 +10695,12 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) { gep_type_iterator GTI = gep_type_begin(GEP); for (User::op_iterator i = GEP.op_begin() + 1, e = GEP.op_end(); i != e; ++i, ++GTI) { - if (isa<SequentialType>(*GTI)) { + // Before trying to eliminate/introduce cast/ext/trunc to make + // indices as pointer types, make sure that the pointer size + // makes a valid sequential index. + const SequentialType *ST = dyn_cast<SequentialType>(*GTI); + Value *PtrTypeVal = Constant::getNullValue(TD->getIntPtrType()); + if (ST && ST->indexValid(PtrTypeVal)) { if (CastInst *CI = dyn_cast<CastInst>(*i)) { if (CI->getOpcode() == Instruction::ZExt || CI->getOpcode() == Instruction::SExt) { |