support compilation against LLVM 9.0

3 files changed, 22 insertions, 12 deletions

diff --git a/lib/Module/Checks.cpp b/lib/Module/Checks.cpp
index 10481f14..7bb8ec50 100644
--- a/lib/Module/Checks.cpp
+++ b/lib/Module/Checks.cpp
@@ -71,9 +71,9 @@ bool DivCheckPass::runOnModule(Module &M) {
 
   LLVMContext &ctx = M.getContext();
   KleeIRMetaData md(ctx);
-  auto divZeroCheckFunction = cast<Function>(
+  auto divZeroCheckFunction =
       M.getOrInsertFunction("klee_div_zero_check", Type::getVoidTy(ctx),
-                            Type::getInt64Ty(ctx) KLEE_LLVM_GOIF_TERMINATOR));
+                            Type::getInt64Ty(ctx) KLEE_LLVM_GOIF_TERMINATOR);
 
   for (auto &divInst : divInstruction) {
     llvm::IRBuilder<> Builder(divInst /* Inserts before divInst*/);
@@ -130,9 +130,9 @@ bool OvershiftCheckPass::runOnModule(Module &M) {
   // Retrieve the checker function
   auto &ctx = M.getContext();
   KleeIRMetaData md(ctx);
-  auto overshiftCheckFunction = cast<Function>(M.getOrInsertFunction(
+  auto overshiftCheckFunction = M.getOrInsertFunction(
       "klee_overshift_check", Type::getVoidTy(ctx), Type::getInt64Ty(ctx),
-      Type::getInt64Ty(ctx) KLEE_LLVM_GOIF_TERMINATOR));
+      Type::getInt64Ty(ctx) KLEE_LLVM_GOIF_TERMINATOR);
 
   for (auto &shiftInst : shiftInstructions) {
     llvm::IRBuilder<> Builder(shiftInst);
diff --git a/lib/Module/IntrinsicCleaner.cpp b/lib/Module/IntrinsicCleaner.cpp
index 921e6766..1c30d781 100644
--- a/lib/Module/IntrinsicCleaner.cpp
+++ b/lib/Module/IntrinsicCleaner.cpp
@@ -264,14 +264,19 @@ bool IntrinsicCleanerPass::runOnBasicBlock(BasicBlock &b, Module &M) {
       case Intrinsic::trap: {
         // Intrinsic instruction "llvm.trap" found. Directly lower it to
         // a call of the abort() function.
-        Function *F = cast<Function>(
-            M.getOrInsertFunction("abort", Type::getVoidTy(ctx)
-		    KLEE_LLVM_GOIF_TERMINATOR));
-        F->setDoesNotReturn();
-        F->setDoesNotThrow();
+        auto C = M.getOrInsertFunction("abort", Type::getVoidTy(ctx)
+                                                    KLEE_LLVM_GOIF_TERMINATOR);
+#if LLVM_VERSION_CODE >= LLVM_VERSION(9, 0)
+        if (auto *F = dyn_cast<Function>(C.getCallee())) {
+#else
+        if (auto *F = dyn_cast<Function>(C)) {
+#endif
+          F->setDoesNotReturn();
+          F->setDoesNotThrow();
+        }
 
         llvm::IRBuilder<> Builder(ii);
-        Builder.CreateCall(F);
+        Builder.CreateCall(C);
         Builder.CreateUnreachable();
 
         i = ii->eraseFromParent();
diff --git a/lib/Module/KModule.cpp b/lib/Module/KModule.cpp
index 315942b5..cec0ea6f 100644
--- a/lib/Module/KModule.cpp
+++ b/lib/Module/KModule.cpp
@@ -140,10 +140,15 @@ static Function *getStubFunctionForCtorList(Module *m,
   if (arr) {
     for (unsigned i=0; i<arr->getNumOperands(); i++) {
       auto cs = cast<ConstantStruct>(arr->getOperand(i));
-      // There is a third *optional* element in global_ctor elements (``i8
-      // @data``).
+      // There is a third element in global_ctor elements (``i8 @data``).
+#if LLVM_VERSION_CODE >= LLVM_VERSION(9, 0)
+      assert(cs->getNumOperands() == 3 &&
+             "unexpected element in ctor initializer list");
+#else
+      // before LLVM 9.0, the third operand was optional
       assert((cs->getNumOperands() == 2 || cs->getNumOperands() == 3) &&
              "unexpected element in ctor initializer list");
+#endif
       auto fp = cs->getOperand(1);
       if (!fp->isNullValue()) {
         if (auto ce = dyn_cast<llvm::ConstantExpr>(fp))