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      1 ; RUN: llc -mtriple=aarch64-linux-gnu -filetype=obj -o - %s | llvm-objdump -disassemble - | FileCheck %s
      2 
      3 ; The encoding of lsb -> immr in the CGed bitfield instructions was wrong at one
      4 ; point, in the edge case where lsb = 0. Just make sure.
      5 
      6 define void @test_bfi0(i32* %existing, i32* %new) {
      7 ; CHECK: bfxil {{w[0-9]+}}, {{w[0-9]+}}, #0, #18
      8 
      9   %oldval = load volatile i32, i32* %existing
     10   %oldval_keep = and i32 %oldval, 4294705152 ; 0xfffc_0000
     11 
     12   %newval = load volatile i32, i32* %new
     13   %newval_masked = and i32 %newval, 262143 ; = 0x0003_ffff
     14 
     15   %combined = or i32 %newval_masked, %oldval_keep
     16   store volatile i32 %combined, i32* %existing
     17 
     18   ret void
     19 }
     20