test/CodeGen/ARM/jump-table-dbg-value.mir

# RUN: llc -mtriple=thumbv6m-apple-unknown-macho --run-pass=arm-cp-islands -o - %s | FileCheck %s
--- |
  ; ModuleID = 'test.ll'
  source_filename = "simple.ll"
  target datalayout = "e-m:o-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
  target triple = "thumbv6m-apple-unknown-macho"
  
  define i32 @foo(i32 %in) !dbg !5 {
    call void @llvm.dbg.value(metadata i32 0, metadata !9, metadata !DIExpression()), !dbg !11
    switch i32 %in, label %default [
      i32 0, label %l0
      i32 1, label %l1
      i32 2, label %l2
      i32 3, label %l3
    ], !dbg !11
  
  default:                                          ; preds = %0
    ret i32 42, !dbg !12
  
  l0:                                               ; preds = %0
    ret i32 0, !dbg !13
  
  l1:                                               ; preds = %0
    ret i32 1, !dbg !14
  
  l2:                                               ; preds = %0
    ret i32 2, !dbg !15
  
  l3:                                               ; preds = %0
    ret i32 3, !dbg !16
  }
  
  ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
  declare void @llvm.dbg.value(metadata, metadata, metadata) #0
  
  attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
  
  !llvm.dbg.cu = !{!0}
  !llvm.debugify = !{!2, !3}
  !llvm.module.flags = !{!4}
  
  !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
  !1 = !DIFile(filename: "simple.ll", directory: "/")
  !2 = !{i32 6}
  !3 = !{i32 1}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
  !6 = !DISubroutineType(types: !7)
  !7 = !{}
  !8 = !{!9}
  !9 = !DILocalVariable(name: "1", scope: !5, file: !1, line: 1, type: !10)
  !10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
  !11 = !DILocation(line: 1, column: 1, scope: !5)
  !12 = !DILocation(line: 2, column: 1, scope: !5)
  !13 = !DILocation(line: 3, column: 1, scope: !5)
  !14 = !DILocation(line: 4, column: 1, scope: !5)
  !15 = !DILocation(line: 5, column: 1, scope: !5)
  !16 = !DILocation(line: 6, column: 1, scope: !5)

...
---
name:            foo
alignment:       2
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
callsEHReturn:   false
callsUnwindInit: false
hasEHCatchret:   false
hasEHScopes:     false
hasEHFunclets:   false
debugInstrRef:   false
failsVerification: false
tracksDebugUserValues: true
registers:       []
liveins:
  - { reg: '$r0', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    1
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  functionContext: ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  hasTailCall:     false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:           []
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo: {}
jumpTable:
  kind:            inline
  entries:
    - id:              0
      blocks:          [ '%bb.3', '%bb.4', '%bb.5', '%bb.6' ]
body:             |
  bb.0 (%ir-block.0):
    successors: %bb.2(0x19999998), %bb.1(0x66666668)
    liveins: $r0
  
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    tCMPi8 renamable $r0, 3, 14 /* CC::al */, $noreg, implicit-def $cpsr, debug-location !11
    tBcc %bb.2, 8 /* CC::hi */, killed $cpsr, debug-location !11
  
  bb.1 (%ir-block.0):
    successors: %bb.3(0x20000000), %bb.4(0x20000000), %bb.5(0x20000000), %bb.6(0x20000000)
    liveins: $r0
  
    renamable $r0, dead $cpsr = tLSLri killed renamable $r0, 2, 14 /* CC::al */, $noreg
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    renamable $r1 = tLEApcrelJT %jump-table.0, 14 /* CC::al */, $noreg
    renamable $r0 = tLDRr renamable $r1, killed renamable $r0, 14 /* CC::al */, $noreg :: (load (s32) from jump-table)
    renamable $r0, dead $cpsr = tADDrr killed renamable $r1, killed renamable $r0, 14 /* CC::al */, $noreg
    tBR_JTr killed renamable $r0, %jump-table.0
    ; CHECK: tTBB_JT

  bb.3.l0:
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    renamable $r0, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg
    tBX_RET 14 /* CC::al */, $noreg, implicit $r0, debug-location !13
  
  bb.2.default:
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    renamable $r0, dead $cpsr = tMOVi8 42, 14 /* CC::al */, $noreg
    tBX_RET 14 /* CC::al */, $noreg, implicit $r0, debug-location !12
  
  bb.4.l1:
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    renamable $r0, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
    tBX_RET 14 /* CC::al */, $noreg, implicit $r0, debug-location !14
  
  bb.5.l2:
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    renamable $r0, dead $cpsr = tMOVi8 2, 14 /* CC::al */, $noreg
    tBX_RET 14 /* CC::al */, $noreg, implicit $r0, debug-location !15
  
  bb.6.l3:
    DBG_VALUE 0, $noreg, !9, !DIExpression(), debug-location !11
    renamable $r0, dead $cpsr = tMOVi8 3, 14 /* CC::al */, $noreg
    tBX_RET 14 /* CC::al */, $noreg, implicit $r0, debug-location !16

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