[LLVMbugs] [Bug 2472] New: Missing VZEXT_MOVL pattern for <4 x i32>

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2472

           Summary: Missing VZEXT_MOVL pattern for <4 x i32>
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sharparrow1 at yahoo.com
                CC: llvmbugs at cs.uiuc.edu


Testcase:
define <4 x i32> @a(<4 x i32> %a) {
entry:
        %vecext = extractelement <4 x i32> %a, i32 0
        insertelement <4 x i32> zeroinitializer, i32 %vecext, i32 0
        %add = add <4 x i32> %a, %0
        ret <4 x i32> %add
}

Run through llvm-as | llc, prints the following and aborts:
Cannot yet select: 0x8a470c8: v4i32 = X86ISD::VZEXT_MOVL 0x8a473d8

It looks like general patterns are also missing for v8i16 and v16i8; I'm not
completely sure if those are supposed to be legal, though.


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