[llvm-bugs] [Bug 34246] New: [PowerPC] failed to match nor+and to andc?

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34246

            Bug ID: 34246
           Summary: [PowerPC] failed to match nor+and to andc?
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: PowerPC
          Assignee: unassignedbugs at nondot.org
          Reporter: spatel+llvm at rotateright.com
                CC: llvm-bugs at lists.llvm.org

This example is derived from https://reviews.llvm.org/D36840 :

$ cat xxlandc.ll 
define <4 x i32> @cmp_sel_0_or_1_vec(<4 x i32> %x, <4 x i32> %y) {
  %cond = icmp eq <4 x i32> %x, %y
  %sext = sext <4 x i1> %cond to <4 x i32>
  %add = add <4 x i32> %sext, <i32 1, i32 1, i32 1, i32 1>
  ret <4 x i32> %add
}

$ ./llc -o - xxlandc.ll -mtriple=powerpc64le
        vcmpequw 2, 2, 3
        vspltisw 19, 1
        xxlnor 0, 34, 34
        xxland 34, 0, 51
        blr

Or with old PPC64 + Altivec:
        vcmpequw 2, 2, 3
        vspltisw 19, 1
        vnot     2, 2
        vand 2, 2, 19

This should match to xxlandc / vandc?

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