# RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s
#
# This test tests tracking variables value transferring from one register to another.
# This example is altered additionally in order to test transferring from one float register
# to another. The altered instructions are labeled below.
#
# CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1"
# CHECK: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[ARG1]], !DIExpression(), debug-location
# CHECK: $r12d = MOV32rr killed $ebx, implicit-def $r12
# CHECK-NEXT: DBG_VALUE debug-use $r12d, debug-use $noreg, ![[ARG1]], !DIExpression(), debug-location
--- |
  ; ModuleID = 'live-debug-values-reg-copy.ll'
  source_filename = "live-debug-values-reg-copy.c"
  target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
  target triple = "x86_64-unknown-linux-gnu"

  define dso_local i32 @foo(i32 %arg1) local_unnamed_addr !dbg !7 {
  entry:
    %local1 = alloca i32, align 4
    call void @llvm.dbg.value(metadata i32 %arg1, metadata !12, metadata !DIExpression()), !dbg !15
    %0 = bitcast i32* %local1 to i8*, !dbg !15
    call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15
    call void @init(i32* nonnull %local1), !dbg !15
    %1 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
    %add = add nsw i32 %1, %arg1, !dbg !15
    %call = call i32 @coeficient(i32 %add), !dbg !15
    %cmp = icmp sgt i32 %call, 32, !dbg !15
    br i1 %cmp, label %if.then, label %if.else, !dbg !15

  if.then:                                          ; preds = %entry
    %call1 = call i32 @externFunc(i32 %arg1), !dbg !15
    %2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
    %add2 = add nsw i32 %2, %call1, !dbg !15
    br label %if.end, !dbg !15

  if.else:                                          ; preds = %entry
    %call3 = call i32 @externFunc2(i32 %arg1), !dbg !15
    %3 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
    %add4 = add nsw i32 %3, %call3, !dbg !15
    br label %if.end

  if.end:                                           ; preds = %if.else, %if.then
    %storemerge = phi i32 [ %add4, %if.else ], [ %add2, %if.then ]
    %4 = bitcast i32* %local1 to i8*
    %mul = shl nsw i32 %arg1, 2, !dbg !15
    %add5 = add nsw i32 %storemerge, %mul, !dbg !15
    %mul6 = mul nsw i32 %add5, %call, !dbg !15
    call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %4), !dbg !15
    ret i32 %mul6, !dbg !15
  }

  ; Function Attrs: argmemonly nounwind
  declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0

  declare dso_local void @init(i32*) local_unnamed_addr

  declare dso_local i32 @coeficient(i32) local_unnamed_addr

  declare dso_local i32 @externFunc(i32) local_unnamed_addr

  declare dso_local i32 @externFunc2(i32) local_unnamed_addr

  ; Function Attrs: argmemonly nounwind
  declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0

  ; Function Attrs: nounwind readnone speculatable
  declare void @llvm.dbg.value(metadata, metadata, metadata) #1

  ; Function Attrs: nounwind
  declare void @llvm.stackprotector(i8*, i8**) #2

  attributes #0 = { argmemonly nounwind }
  attributes #1 = { nounwind readnone speculatable }
  attributes #2 = { 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 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
  !1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/")
  !2 = !{}
  !3 = !{i32 2, !"Dwarf Version", i32 4}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = !{i32 1, !"wchar_size", i32 4}
  !6 = !{!"clang version 7.0.0 "}
  !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
  !8 = !DISubroutineType(types: !9)
  !9 = !{!10, !10}
  !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !11 = !{!12}
  !12 = !DILocalVariable(name: "arg1", arg: 1, scope: !7, file: !1, line: 6, type: !10)
  !15 = !DILocation(line: 6, column: 13, scope: !7)
  !20 = !{!21, !21, i64 0}
  !21 = !{!"int", !22, i64 0}
  !22 = !{!"omnipotent char", !23, i64 0}
  !23 = !{!"Simple C/C++ TBAA"}

...
---
name:            foo
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
liveins:
  - { reg: '$edi', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       24
  offsetAdjustment: 0
  maxAlignment:    4
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  ''
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  savePoint:       ''
  restorePoint:    ''
fixedStack:
  - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: 0,
      callee-saved-register: '$rbx', callee-saved-restored: true }
  - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: 0,
      callee-saved-register: '$rbp', callee-saved-restored: true }
stack:
  - { id: 0, name: local1, type: default, offset: -28, size: 4, alignment: 4,
      stack-id: 0, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
constants:
body:             |
  bb.0.entry:
    successors: %bb.1(0x40000000), %bb.2(0x40000000)
    liveins: $edi, $rbp, $rbx

    frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 16
    frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 24
    frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 32
    CFI_INSTRUCTION offset $rbx, -24
    CFI_INSTRUCTION offset $rbp, -16
    DBG_VALUE debug-use $edi, debug-use $noreg, !12, !DIExpression(), debug-location !15
    $ebx = MOV32rr $edi, implicit-def $rbx
    DBG_VALUE debug-use $ebx, debug-use $noreg, !12, !DIExpression(), debug-location !15
    renamable $rdi = LEA64r $rsp, 1, $noreg, 4, $noreg
    CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !15
    renamable $edi = MOV32rm $rsp, 1, $noreg, 4, $noreg :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
    renamable $edi = ADD32rr killed renamable $edi, renamable $ebx, implicit-def dead $eflags, debug-location !15
    CALL64pcrel32 @coeficient, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
    $ebp = MOV32rr $eax, debug-location !15
    $edi = MOV32rr $ebx, debug-location !15
    CMP32ri8 renamable $ebp, 33, implicit-def $eflags, debug-location !15
    JL_1 %bb.2, implicit killed $eflags, debug-location !15

  bb.1.if.then:
    successors: %bb.3(0x80000000)
    liveins: $ebp, $edi

    CALL64pcrel32 @externFunc, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
    JMP_1 %bb.3

  bb.2.if.else:
    successors: %bb.3(0x80000000)
    liveins: $ebp, $edi

    CALL64pcrel32 @externFunc2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15

  bb.3.if.end:
    liveins: $ebp, $ebx, $eax
    ; Instruction below is added in order to test moving variable's value from one register to another.
    $r12d = MOV32rr killed $ebx, implicit-def $r12
    renamable $eax = KILL $eax, implicit-def $rax
    renamable $eax = ADD32rm renamable $eax, $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
    renamable $eax = LEA64_32r killed renamable $rax, 4, killed renamable $r12, 0, $noreg, debug-location !15
    renamable $eax = IMUL32rr killed renamable $eax, killed renamable $ebp, implicit-def dead $eflags, debug-location !15
    $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !15
    $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
    $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
    RETQ $eax, debug-location !15

...