[llvm-bugs] [Bug 40853] New: Enable overflow intrinsic vectorization support

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40853

            Bug ID: 40853
           Summary: Enable overflow intrinsic vectorization support
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: a.bataev at hotmail.com, florian_hahn at apple.com,
                    llvm-bugs at lists.llvm.org, nikita.ppv at gmail.com

Now that vector versions of the *.overflow intrinsics are supported we need to
add vectorization support.

For instance, in SLP BoUpSLP::canMapToVector can't handle the return struct
type:

{i32, i1} @llvm.sadd.with.overflow.i32(i32 %a, i32 %b)

to

{<4 x i32>, <4 x i1>} @llvm.sadd.with.overflow.v4i32(<4 x i32> %a, <4 x i32>
%b)

The LV has similar issues.

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