From: Jiri Slaby <jirislaby@gmail.com>
Date: Thu, 8 Jun 2017 13:25:56 +0200
Subject: llvm: PointerType is not SequentialType in LLVM 4
Patch-mainline: no

So handle the type specially whenever needed.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
---
 include/klee/util/GetElementPtrTypeIterator.h |  4 ++++
 lib/Core/Executor.cpp                         | 22 ++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/include/klee/util/GetElementPtrTypeIterator.h b/include/klee/util/GetElementPtrTypeIterator.h
index 5fb9f4ec5c2f..bf7cb6ff0bea 100644
--- a/include/klee/util/GetElementPtrTypeIterator.h
+++ b/include/klee/util/GetElementPtrTypeIterator.h
@@ -78,6 +78,10 @@ class generic_gep_type_iterator
     generic_gep_type_iterator& operator++() {   // Preincrement
       if (llvm::CompositeType *CT = dyn_cast<llvm::CompositeType>(CurTy)) {
         CurTy = CT->getTypeAtIndex(getOperand());
+#if LLVM_VERSION_CODE >= LLVM_VERSION(4, 0)
+      } else if (llvm::PointerType *ptr = dyn_cast<llvm::PointerType>(CurTy)) {
+        CurTy = ptr->getElementType();
+#endif
       } else {
         CurTy = 0;
       }
diff --git a/lib/Core/Executor.cpp b/lib/Core/Executor.cpp
index 61a54d72f48b..f994a82e2df7 100644
--- a/lib/Core/Executor.cpp
+++ b/lib/Core/Executor.cpp
@@ -2589,8 +2589,7 @@ void Executor::computeOffsets(KGEPInstruction *kgepi, TypeIt ib, TypeIt ie) {
       uint64_t addend = sl->getElementOffset((unsigned) ci->getZExtValue());
       constantOffset = constantOffset->Add(ConstantExpr::alloc(addend,
                                                                Context::get().getPointerWidth()));
-    } else {
-      const SequentialType *set = cast<SequentialType>(*ii);
+    } else if (const SequentialType *set = dyn_cast<SequentialType>(*ii)) {
       uint64_t elementSize = 
         kmodule->targetData->getTypeStoreSize(set->getElementType());
       Value *operand = ii.getOperand();
@@ -2604,7 +2603,24 @@ void Executor::computeOffsets(KGEPInstruction *kgepi, TypeIt ib, TypeIt ie) {
       } else {
         kgepi->indices.push_back(std::make_pair(index, elementSize));
       }
-    }
+#if LLVM_VERSION_CODE >= LLVM_VERSION(4, 0)
+    } else if (const PointerType *ptr = dyn_cast<PointerType>(*ii)) {
+      uint64_t elementSize =
+        kmodule->targetData->getTypeStoreSize(ptr->getElementType());
+      Value *operand = ii.getOperand();
+      if (Constant *c = dyn_cast<Constant>(operand)) {
+        ref<ConstantExpr> index =
+          evalConstant(c)->SExt(Context::get().getPointerWidth());
+        ref<ConstantExpr> addend =
+          index->Mul(ConstantExpr::alloc(elementSize,
+                                         Context::get().getPointerWidth()));
+        constantOffset = constantOffset->Add(addend);
+      } else {
+        kgepi->indices.push_back(std::make_pair(index, elementSize));
+      }
+#endif
+    } else
+      assert("invalid type" && 0);
     index++;
   }
   kgepi->offset = constantOffset->getZExtValue();
-- 
2.17.1