llvm/test/DebugInfo/COFF/AArch64/codeview-b-register.mir

# This test checks that we have a mapping between the B registers and their Codeview numbers.
# There is no 8 bit float type so this is a modified version of codeview-h-register.mir to
# have a B register in the location info but not the instructions. Which is incorrect
# but in ways this test does not care about.
#
# RUN: llc %s -mtriple=arm64-windows -filetype=obj -o %t --start-after=unpack-mi-bundles
# RUN: llvm-readobj --codeview %t | FileCheck %s --check-prefix=OBJ
#
# OBJ: LocalSym {
# OBJ:   Kind: S_LOCAL (0x113E)
# OBJ:   Type: __half (0x46)
# OBJ:   Flags [ (0x1)
# OBJ:     IsParameter (0x1)
# OBJ:   ]
# OBJ:   VarName: x
# OBJ: }
# OBJ: DefRangeRegisterSym {
# OBJ:   Kind: S_DEFRANGE_REGISTER (0x1141)
# OBJ:   Register: ARM64_B0 (0xE6)
# OBJ:   MayHaveNoName: 0
# OBJ:   LocalVariableAddrRange {
# OBJ:     OffsetStart: .text+0x0
# OBJ:     ISectStart: 0x0
# OBJ:     Range: 0x4
# OBJ:   }
# OBJ: }
#
--- |
  define internal fastcc i1 @test.fn(half %0) !dbg !4 {
  Entry:
    call void @llvm.dbg.value(metadata half %0, metadata !11, metadata !DIExpression()), !dbg !13
    %1 = fcmp une half 0xH0000, %0, !dbg !14
    ret i1 %1
  }

  ; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn
  declare void @llvm.dbg.value(metadata, metadata, metadata) #0

  attributes #0 = { nocallback nofree nosync nounwind readnone speculatable willreturn }

  !llvm.module.flags = !{!0, !1}
  !llvm.dbg.cu = !{!2}

  !0 = !{i32 2, !"Debug Info Version", i32 3}
  !1 = !{i32 2, !"CodeView", i32 1}
  !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
  !3 = !DIFile(filename: "test", directory: ".")
  !4 = distinct !DISubprogram(name: "fn", linkageName: "test.fn", scope: !5, file: !5, line: 32, type: !6, scopeLine: 32, flags: DIFlagStaticMember, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !2, retainedNodes: !10)
  !5 = !DIFile(filename: "test.o", directory: ".")
  !6 = !DISubroutineType(types: !7)
  !7 = !{!8, !9}
  !8 = !DIBasicType(name: "bool", size: 1, encoding: DW_ATE_boolean)
  !9 = !DIBasicType(name: "f16", size: 16, encoding: DW_ATE_float)
  !10 = !{!11}
  !11 = !DILocalVariable(name: "x", arg: 1, scope: !12, file: !5, line: 32, type: !9)
  !12 = distinct !DILexicalBlock(scope: !4, file: !5, line: 32, column: 1)
  !13 = !DILocation(line: 32, column: 31, scope: !12)
  !14 = !DILocation(line: 33, column: 5, scope: !15)
  !15 = distinct !DILexicalBlock(scope: !12, file: !5)
...
---
name: test.fn
body: |
  bb.0:
  liveins: $b0
  DBG_VALUE $b0, $noreg, !11, !DIExpression(), debug-location !13
  renamable $s0 = nofpexcept FCVTSHr killed renamable $h0, implicit $fpcr, debug-location !14
  DBG_VALUE $b0, $noreg, !11, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !13
  nofpexcept FCMPSri killed renamable $s0, implicit-def $nzcv, implicit $fpcr, debug-location !14
  renamable $w0 = CSINCWr $wzr, $wzr, 0, implicit killed $nzcv, debug-location !14
  RET undef $lr, implicit killed $w0
...