Added bug fix for root arguments passed to visc_launch

llvm/tools/hpvm/lib/Transforms/GenVISC/GenVISC.cpp

@@ -945,8 +945,13 @@ bool GenVISC::runOnModule(Module &M) {
         ConstantInt* Op = cast<ConstantInt>(CI->getArgOperand(0));
         Value* isStreaming = Op->isZero()? ConstantInt::getFalse(Ctx)
                              : ConstantInt::getTrue(Ctx);
-
-        Value* LaunchArgs[] = {F, CI->getArgOperand(2), isStreaming};
+        
+        auto *ArgTy = dyn_cast<PointerType>(CI->getArgOperand(2)->getType());
+        assert(ArgTy && "VISC launch argument should be pointer type.");
+        Value *Arg = CI->getArgOperand(2);
+        if(!ArgTy->getElementType()->isIntegerTy(8))
+          Arg = BitCastInst::CreatePointerCast(CI->getArgOperand(2), Type::getInt8PtrTy(Ctx), "", CI);
+        Value* LaunchArgs[] = {F, Arg, isStreaming};
         CallInst* LaunchInst = CallInst::Create(LaunchF,
                                                 ArrayRef<Value*>(LaunchArgs, 3),
                                                 "graphID", CI);