--- |
  ; RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
  ; Created from:
  ; void sink(int a);
  ; void __attribute((always_inline)) f(int a) { sink(a); }
  ; void foo(int i) {
  ;   f(i);
  ;   if (i)
  ;     f(i);
  ;   f(i);
  ; }
  ;
  ; This test verifies that LiveDebugValues doesn't propagate DBG_VALUEs into
  ; basic blocks that are beyond the scope of the source variable.
  ;
  ; CHECK:  bb.1.if.then:
  ; CHECK:      DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
  ; CHECK-NOT:  DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !21
  ; CHECK:      DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !27
  ; CHECK: bb.2.if.end:
  ; CHECK:     DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
  ; CHECK-NOT: DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !21
  ; CHECK:     DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !31
  ;
  ; ModuleID = 'livedebugvalues-limit.ll'
  source_filename = "livedebugvalues-limit.c"
  target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
  target triple = "x86_64-apple-macosx"
  
  ; Function Attrs: alwaysinline nounwind ssp uwtable
  define void @f(i32 %a) local_unnamed_addr #0 !dbg !7 {
  entry:
    tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !13), !dbg !14
    tail call void @sink(i32 %a) #4, !dbg !15
    ret void, !dbg !16
  }
  
  declare void @sink(i32) local_unnamed_addr
  
  ; Function Attrs: nounwind ssp uwtable
  define void @foo(i32 %i) local_unnamed_addr #2 !dbg !17 {
  entry:
    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !19, metadata !13), !dbg !20
    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !21
    tail call void @sink(i32 %i) #4, !dbg !23
    %tobool = icmp eq i32 %i, 0, !dbg !24
    br i1 %tobool, label %if.end, label %if.then, !dbg !26
  
  if.then:                                          ; preds = %entry
    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !27
    tail call void @sink(i32 %i) #4, !dbg !29
    br label %if.end, !dbg !30
  
  if.end:                                           ; preds = %if.then, %entry
    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !31
    tail call void @sink(i32 %i) #4, !dbg !33
    ret void, !dbg !34
  }
  
  ; Function Attrs: nounwind readnone
  declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
  
  ; Function Attrs: nounwind
  declare void @llvm.stackprotector(i8*, i8**) #4
  
  attributes #0 = { alwaysinline nounwind ssp uwtable }
  attributes #2 = { nounwind ssp uwtable }
  attributes #3 = { nounwind readnone }
  attributes #4 = { nounwind }
  
  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3, !4, !5}
  !llvm.ident = !{!6}
  
  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
  !1 = !DIFile(filename: "livedebugvalues-limit.c", directory: "/Volumes/Fusion/Data/llvm")
  !2 = !{}
  !3 = !{i32 2, !"Dwarf Version", i32 4}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = !{i32 1, !"PIC Level", i32 2}
  !6 = !{!"clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)"}
  !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !11)
  !8 = !DISubroutineType(types: !9)
  !9 = !{null, !10}
  !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
  !11 = !{!12}
  !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 3, type: !10)
  !13 = !DIExpression()
  !14 = !DILocation(line: 3, column: 41, scope: !7)
  !15 = !DILocation(line: 3, column: 46, scope: !7)
  !16 = !DILocation(line: 3, column: 55, scope: !7)
  !17 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !18)
  !18 = !{!19}
  !19 = !DILocalVariable(name: "i", arg: 1, scope: !17, file: !1, line: 4, type: !10)
  !20 = !DILocation(line: 4, column: 14, scope: !17)
  !21 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !22)
  !22 = distinct !DILocation(line: 5, column: 3, scope: !17)
  !23 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !22)
  !24 = !DILocation(line: 6, column: 7, scope: !25)
  !25 = distinct !DILexicalBlock(scope: !17, file: !1, line: 6, column: 7)
  !26 = !DILocation(line: 6, column: 7, scope: !17)
  !27 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !28)
  !28 = distinct !DILocation(line: 7, column: 5, scope: !25)
  !29 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !28)
  !30 = !DILocation(line: 7, column: 5, scope: !25)
  !31 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !32)
  !32 = distinct !DILocation(line: 8, column: 3, scope: !17)
  !33 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !32)
  !34 = !DILocation(line: 9, column: 1, scope: !17)

...
---
name:            f
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
liveins:         
  - { reg: '%edi' }
calleeSavedRegisters: [ '%bh', '%bl', '%bp', '%bpl', '%bx', '%ebp', '%ebx', 
                        '%rbp', '%rbx', '%r12', '%r13', '%r14', '%r15', 
                        '%r12b', '%r13b', '%r14b', '%r15b', '%r12d', '%r13d', 
                        '%r14d', '%r15d', '%r12w', '%r13w', '%r14w', '%r15w' ]
frameInfo:       
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       8
  offsetAdjustment: 0
  maxAlignment:    0
  adjustsStack:    false
  hasCalls:        false
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
fixedStack:      
  - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 }
body:             |
  bb.0.entry:
    liveins: %edi, %rbp
  
    frame-setup PUSH64r killed %rbp, implicit-def %rsp, implicit %rsp
    CFI_INSTRUCTION def_cfa_offset 16
    CFI_INSTRUCTION offset %rbp, -16
    %rbp = frame-setup MOV64rr %rsp
    CFI_INSTRUCTION def_cfa_register %rbp
    DBG_VALUE debug-use %edi, debug-use _, !12, !13, debug-location !14
    %rbp = POP64r implicit-def %rsp, implicit %rsp, debug-location !15
    TAILJMPd64 @sink, csr_64, implicit %rsp, implicit %rsp, implicit %edi, debug-location !15

...
---
name:            foo
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
liveins:         
  - { reg: '%edi' }
calleeSavedRegisters: [ '%bh', '%bl', '%bp', '%bpl', '%bx', '%ebp', '%ebx', 
                        '%rbp', '%rbx', '%r12', '%r13', '%r14', '%r15', 
                        '%r12b', '%r13b', '%r14b', '%r15b', '%r12d', '%r13d', 
                        '%r14d', '%r15d', '%r12w', '%r13w', '%r14w', '%r15w' ]
frameInfo:       
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       24
  offsetAdjustment: -8
  maxAlignment:    0
  adjustsStack:    true
  hasCalls:        true
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
fixedStack:      
  - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '%rbx' }
  - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16 }
body:             |
  bb.0.entry:
    successors: %bb.2.if.end, %bb.1.if.then
    liveins: %edi, %rbx, %rbp
  
    frame-setup PUSH64r killed %rbp, implicit-def %rsp, implicit %rsp
    CFI_INSTRUCTION def_cfa_offset 16
    CFI_INSTRUCTION offset %rbp, -16
    %rbp = frame-setup MOV64rr %rsp
    CFI_INSTRUCTION def_cfa_register %rbp
    frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp
    frame-setup PUSH64r undef %rax, implicit-def %rsp, implicit %rsp
    CFI_INSTRUCTION offset %rbx, -24
    DBG_VALUE debug-use %edi, debug-use _, !19, !13, debug-location !20
    %ebx = MOV32rr %edi
    DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !21
    DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
    CALL64pcrel32 @sink, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !23
    TEST32rr %ebx, %ebx, implicit-def %eflags, debug-location !24
    JE_1 %bb.2.if.end, implicit %eflags
  
  bb.1.if.then:
    successors: %bb.2.if.end
    liveins: %ebx, %rbp
  
    DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
    DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !27
    %edi = MOV32rr %ebx, debug-location !29
    CALL64pcrel32 @sink, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !29
  
  bb.2.if.end:
    liveins: %ebx, %rbp
  
    DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
    %edi = MOV32rr killed %ebx, debug-location !33
    %rsp = ADD64ri8 %rsp, 8, implicit-def dead %eflags, debug-location !33
    DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !31
    %rbx = POP64r implicit-def %rsp, implicit %rsp, debug-location !33
    %rbp = POP64r implicit-def %rsp, implicit %rsp, debug-location !33
    TAILJMPd64 @sink, csr_64, implicit %rsp, implicit %rsp, implicit %edi, debug-location !33

...