llvm/llvm/test/CodeGen/AArch64/PHIElimination-debugloc.mir

# RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -o - %s \
# RUN:   -run-pass=livevars,phi-node-elimination,twoaddressinstruction \
# RUN:   -no-phi-elim-live-out-early-exit=1 -phi-elim-split-all-critical-edges=1 \
# RUN: | FileCheck %s
# RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -o - %s \
# RUN:   --passes='require<live-vars>,phi-node-elimination,two-address-instruction' \
# RUN:   -no-phi-elim-live-out-early-exit=1 -phi-elim-split-all-critical-edges=1 \
# RUN: | FileCheck %s

--- |
  define void @test() !dbg !7 {
  entry:
    ret void, !dbg !14
  }
  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3, !4}

  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "Adrian", emissionKind: FullDebug)
  !1 = !DIFile(filename: "/tmp/t.c", directory: "/")
  !2 = !{}
  !3 = !{i32 2, !"Dwarf Version", i32 2}
  !4 = !{i32 2, !"Debug Info Version", i32 4}
  !5 = !{i32 1, !"PIC Level", i32 2}
  !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
  !8 = !DISubroutineType(types: !{})
  !14 = !DILocation(line: 1, column: 0, scope: !7)

---
name: test
tracksRegLiveness: true
body: |
  bb.0:
    liveins: $nzcv, $wzr
    Bcc 8, %bb.2, implicit $nzcv

  ; CHECK-LABEL: bb.1:
  bb.1:
    %x:gpr32 = COPY $wzr
  ; Test that the debug location is not copied into bb1!
  ; CHECK: %3:gpr32 = COPY killed %x{{$}}
  ; CHECK-LABEL: bb.2:
  bb.2:
    %y:gpr32 = PHI %x:gpr32, %bb.1, undef %undef:gpr32, %bb.0, debug-location !14
    $wzr = COPY %y:gpr32
...