llvm/test/DebugInfo/WebAssembly/remove-reg-dbg-value.mir

# RUN: llc -run-pass wasm-debug-fixup %s -o - | FileCheck %s

# Test if '#DEBUG_VALUE' comments for target indices are printed correctly.

--- |
  target triple = "wasm32-unknown-unknown"

  define void @test_remove_dangling_reg_dbg_value() !dbg !5 {
    call void @llvm.dbg.value(metadata i32 0, metadata !9, metadata !DIExpression()), !dbg !10
    call void @llvm.dbg.value(metadata i32 0, metadata !11, metadata !DIExpression()), !dbg !10
    ret void
  }

  declare void @llvm.dbg.value(metadata, metadata, metadata)

  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!2, !3, !4}

  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, emissionKind: FullDebug)
  !1 = !DIFile(filename: "test.c", directory: "")
  !2 = !{i32 7, !"Dwarf Version", i32 5}
  !3 = !{i32 2, !"Debug Info Version", i32 3}
  !4 = !{i32 1, !"wchar_size", i32 4}
  !5 = distinct !DISubprogram(name: "test_dbg_value_comment", scope: !1, file: !1, line: 1, type: !6, scopeLine: 1, unit: !0)
  !6 = !DISubroutineType(types: !7)
  !7 = !{!8}
  !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !9 = !DILocalVariable(name: "var0", scope: !5, file: !1, line: 2, type: !8)
  !10 = !DILocation(line: 0, scope: !5)
  !11 = !DILocalVariable(name: "var1", scope: !5, file: !1, line: 2, type: !8)
...

---
# CHECK-LABEL: name: test_remove_dangling_reg_dbg_value
name: test_remove_dangling_reg_dbg_value
liveins:
  - { reg: '$arguments' }
body: |
  ; CHECK: bb.0:
  ; CHECK: DBG_VALUE $noreg, $noreg, !9, !DIExpression(), debug-location !10
  ; CHECK-NEXT: DBG_VALUE target-index(wasm-local) + 1, $noreg, !11, !DIExpression(), debug-location !10
  ; CHECK-NEXT: RETURN
  bb.0:
    liveins: $arguments
    ; This %3 is a danling register and will turn to $noreg
    DBG_VALUE %3:i32, $noreg, !9, !DIExpression(), debug-location !10
    ; This debug info will remain the same, because it's in a local
    DBG_VALUE target-index(wasm-local) + 1, $noreg, !11, !DIExpression(), debug-location !10
    RETURN implicit-def dead $arguments
...