[llvm-bugs] [Bug 39334] New: error in backend: Cannot select: 0x1460f44e8: i64 = extract_vector_elt 0x1461398b0

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https://bugs.llvm.org/show_bug.cgi?id=39334

            Bug ID: 39334
           Summary: error in backend: Cannot select: 0x1460f44e8: i64 =
                    extract_vector_elt 0x1461398b0
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: joel at jms.id.au
                CC: llvm-bugs at lists.llvm.org

building the Linux kernel for powerpc using clang trunk:

  CC      arch/powerpc/kernel/time.o
fatal error: error in backend: Cannot select: 0x1460f44e8: i64 =
extract_vector_elt 0x1461398b0,
      TargetConstant:i32<1>
  0x1461398b0: v2i64 = PPCISD::XXREVERSE 0x1461399e8
    0x1461399e8: v2i64 = BUILD_VECTOR 0x1460f4140, 0x1460f4140
      0x1460f4140: i64,ch = CopyFromReg 0x146038b18, Register:i64 %9
        0x146139298: i64 = Register %9
      0x1460f4140: i64,ch = CopyFromReg 0x146038b18, Register:i64 %9
        0x146139298: i64 = Register %9
  0x1460f4ca0: i32 = TargetConstant<1>
In function: scan_dispatch_log
clang-8: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 8.0.0 (trunk 344685)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
InstalledDir: /scratch/joel/llvm-build/bin

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