[PATCH] D31077: Improve DAGTypeLegalizer::PromoteIntRes_TRUNCATE() to handle widening.

[Jonas Paulsson via Phabricator via llvm-commits]

jonpa added inline comments.


================
Comment at: test/CodeGen/SystemZ/vec-trunc-to-i1.ll:4
+; Check that a widening truncate to a vector of i1 elements can be handled.
+
+define void @autogen_SD29574(i8*, i32*, i64*, i32, i64, i8) {
----------------
RKSimon wrote:
> Reduced with bugpoint:
> 
> ```
> define void @autogen_SD29574() {
> BB:
>   %B15 = sub <4 x i8> undef, zeroinitializer
>   br label %CF34
> 
> CF34:                                             ; preds = %CF34, %BB
>   %Tr24 = trunc <4 x i8> %B15 to <4 x i1>
>   %Cmp26 = icmp slt <4 x i1> %Tr24, undef
>   %E28 = extractelement <4 x i1> %Cmp26, i32 3
>   br i1 %E28, label %CF34, label %CF36
> 
> CF36:                                             ; preds = %CF34
>   ret void
> }
> ```
Oops - thought I had done that... thanks.


https://reviews.llvm.org/D31077