[TEST] Add scipy to test dep (#231)

src/codegen/llvm/codegen_llvm.cc

@@ -780,7 +780,7 @@ llvm::Value* CodeGenLLVM::CreateIntrinstic(const Call* op) {
           MakeValue(op->args[0]), MakeValue(op->args[1]));
     }
   } else if (op->is_intrinsic(intrinsic::tvm_throw_last_error)) {
-    builder_->CreateRet(llvm::ConstantInt::getSigned(t_int32_, -1));
+    builder_->CreateRet(ConstInt32(-1));
     return ConstInt32(-1);
   } else if (op->is_intrinsic(intrinsic::tvm_address_of)) {
     const Load *l = op->args[0].as<Load>();
@@ -1440,7 +1440,7 @@ void CodeGenLLVM::VisitStmt_(const AssertStmt* op) {
   // fail condition.
   builder_->SetInsertPoint(fail_block);
   builder_->CreateCall(f_tvm_api_set_last_error_, {msg});
-  builder_->CreateRet(llvm::ConstantInt::getSigned(t_int32_, -1));
+  builder_->CreateRet(ConstInt32(-1));
   // otherwise set it to be new end.
   builder_->SetInsertPoint(end_block);
   // Detect useful invariant pattern and use them to visit child.

src/codegen/llvm/codegen_llvm.h

@@ -70,8 +70,8 @@ class CodeGenLLVM :
     return VisitExpr(e);
   }
   // Short hande code to get a constant int 32
-  llvm::Constant* ConstInt32(unsigned value) const {
-    return llvm::ConstantInt::get(t_int32_, value);
+  llvm::Constant* ConstInt32(int64_t value) const {
+    return llvm::ConstantInt::getSigned(t_int32_, value);
   }
   // override codegen
   llvm::Value* VisitExpr_(const Variable* op) override;

tests/ci_build/install/ubuntu_install_python.sh

@@ -4,5 +4,5 @@ apt-get update && apt-get install -y python-pip python-dev python3-dev
 # the version of the pip shipped with ubuntu may be too lower, install a recent version here
 cd /tmp && wget https://bootstrap.pypa.io/get-pip.py && python3 get-pip.py && python2 get-pip.py
 
-pip2 install nose pylint numpy nose-timer cython decorator
-pip3 install nose pylint numpy nose-timer cython decorator
+pip2 install nose pylint numpy nose-timer cython decorator scipy
+pip3 install nose pylint numpy nose-timer cython decorator scipy