Merge remote-tracking branch 'origin/approx_hpvm_features' into approx_hpvm_reorg_keras

hpvm/test/unitTests/TwoLevel.ll

@@ -10,7 +10,7 @@ target triple = "x86_64-unknown-linux-gnu"
 define dso_local void @Func1(i32* %In, i64 %Insize, i32* %Out, i64 %Outsize) #0 {
 entry:
   tail call void @__hpvm__hint(i32 1) #3
-  tail call void (i32, ...) @__hpvm__attributes(i32 1, i32* %In, i32* %Out, i32 1, i32* %Out) #3
+  tail call void (i32, ...) @__hpvm__attributes(i32 2, i32* %In, i32* %Out, i32 1, i32* %Out) #3
   %0 = load i32, i32* %In, align 4, !tbaa !2
   store i32 %0, i32* %Out, align 4, !tbaa !2
   tail call void (i32, ...) @__hpvm__return(i32 1, i32* %Out) #3