[llvm-bugs] [Bug 47398] New: SelectionDAG::simplifySelect is missing vector constant folding

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47398

            Bug ID: 47398
           Summary: SelectionDAG::simplifySelect is missing vector
                    constant folding
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: justice.adams at sony.com, lebedev.ri at gmail.com,
                    llvm-bugs at lists.llvm.org, spatel+llvm at rotateright.com

It doesn't handle splat or uniform constant selection masks.

The True/False args don't need to be constant really, just BUILD_VECTORs should
be good enough.

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