[llvm-bugs] [Bug 31600] New: Allow vector value types to use signext/zeroext attributes

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31600

            Bug ID: 31600
           Summary: Allow vector value types to use signext/zeroext
                    attributes
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: llvm-bugs at lists.llvm.org, spatel+llvm at rotateright.com
    Classification: Unclassified

As discussed on [Bug #28486], we don't currently support signext/zeroext
attributes on vector value types:

define <4 x i32> @boolext(<4 x i1> signext %a) {
  %ext = sext <4 x i1> %a to <4 x i32>
  ret <4 x i32> %ext
} 

Doing so could help in a number of cases, for instance when passing around
mask/boolean vector data.

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