# RUN: llc -run-pass livedebugvalues -march=x86-64 -o - %s | FileCheck %s

# Generated from the following source with:
# clang -g -mllvm -stop-before=livedebugvalues -S -O2 test.c -o test.mir

# #define FORCE_SPILL() \
#   __asm volatile("" : : : \
#                    "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", \
#                    "r9", "r10", "r11", "r12", "r13", "r14", "r15")
# int f(int *p) {
#   if (p) {
#     FORCE_SPILL();
#   }
#   return *(p + 1);
# }

# Ascertain that the spill has been recognized and manifested in a DBG_VALUE.
# CHECK: MOV64mr $rsp,{{.*-8.*}}killed{{.*}}$rdi :: (store 8 into %stack.0)
# CHECK-NEXT: DBG_VALUE $rsp,{{.*}}![[MDIX:[0-9]+]],{{.*}}!DIExpression(DW_OP_constu, 8, DW_OP_minus)

# Check for the restore.
# CHECK: $rdi = MOV64rm $rsp,{{.*-8.*}}:: (load 8 from %stack.0)
# CHECK-NEXT: DBG_VALUE $rdi,{{.*}}![[MDIX]], !DIExpression()

--- |
  define dso_local i32 @f(i32* readonly %p) local_unnamed_addr !dbg !7 {
  entry:
    call void @llvm.dbg.value(metadata i32* %p, metadata !13, metadata !DIExpression()), !dbg !14
    %tobool = icmp eq i32* %p, null, !dbg !15
    br i1 %tobool, label %if.end, label %if.then, !dbg !17
  
  if.then:                                          ; preds = %entry
    tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"(), !dbg !18, !srcloc !20
    br label %if.end, !dbg !21
  
  if.end:                                           ; preds = %entry, %if.then
    %add.ptr = getelementptr inbounds i32, i32* %p, i64 1, !dbg !22
    %0 = load i32, i32* %add.ptr, align 4, !dbg !23, !tbaa !24
    ret i32 %0, !dbg !28
  }
  
  declare void @llvm.dbg.value(metadata, metadata, metadata)
  
  !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 9.0.0 (https://git.llvm.org/git/clang.git/ 57a6ce7ac318de98e3e777e09cb9ed8282b5cc03) (https://git.llvm.org/git/llvm.git/ ff54a19e4912d7f15cb02798a7f2048441bff751)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
  !1 = !DIFile(filename: "test2.c", directory: "/home/test")
  !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 9.0.0 (https://git.llvm.org/git/clang.git/ 57a6ce7ac318de98e3e777e09cb9ed8282b5cc03) (https://git.llvm.org/git/llvm.git/ ff54a19e4912d7f15cb02798a7f2048441bff751)"}
  !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
  !8 = !DISubroutineType(types: !9)
  !9 = !{!10, !11}
  !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
  !12 = !{!13}
  !13 = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 5, type: !11)
  !14 = !DILocation(line: 5, column: 12, scope: !7)
  !15 = !DILocation(line: 6, column: 7, scope: !16)
  !16 = distinct !DILexicalBlock(scope: !7, file: !1, line: 6, column: 7)
  !17 = !DILocation(line: 6, column: 7, scope: !7)
  !18 = !DILocation(line: 7, column: 5, scope: !19)
  !19 = distinct !DILexicalBlock(scope: !16, file: !1, line: 6, column: 10)
  !20 = !{i32 -2147471544}
  !21 = !DILocation(line: 8, column: 3, scope: !19)
  !22 = !DILocation(line: 9, column: 14, scope: !7)
  !23 = !DILocation(line: 9, column: 10, scope: !7)
  !24 = !{!25, !25, i64 0}
  !25 = !{!"int", !26, i64 0}
  !26 = !{!"omnipotent char", !27, i64 0}
  !27 = !{!"Simple C/C++ TBAA"}
  !28 = !DILocation(line: 9, column: 3, scope: !7)

...
---
name:            f
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:         
  - { reg: '$rdi', virtual-reg: '' }
frameInfo:       
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       48
  offsetAdjustment: -48
  maxAlignment:    8
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 48
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      
  - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: 0, 
      callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, stack-id: 0, 
      callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: 0, 
      callee-saved-register: '$r13', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: 0, 
      callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: 0, 
      callee-saved-register: '$r15', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: 0, 
      callee-saved-register: '$rbp', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
stack:           
  - { id: 0, name: '', type: spill-slot, offset: -64, size: 8, alignment: 8, 
      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.2(0x30000000), %bb.1(0x50000000)
    liveins: $rdi, $rbx, $r12, $r13, $r14, $r15, $rbp
  
    DBG_VALUE $rdi, $noreg, !13, !DIExpression(), debug-location !14
    DBG_VALUE $rdi, $noreg, !13, !DIExpression(), debug-location !14
    TEST64rr renamable $rdi, renamable $rdi, implicit-def $eflags, debug-location !15
    JCC_1 %bb.2, 4, implicit $eflags, debug-location !17
  
  bb.1.if.then:
    successors: %bb.2(0x80000000)
    liveins: $rdi, $rbp, $r15, $r14, $r13, $r12, $rbx
  
    frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 16
    frame-setup PUSH64r killed $r15, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 24
    frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 32
    frame-setup PUSH64r killed $r13, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 40
    frame-setup PUSH64r killed $r12, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 48
    frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 56
    CFI_INSTRUCTION offset $rbx, -56
    CFI_INSTRUCTION offset $r12, -48
    CFI_INSTRUCTION offset $r13, -40
    CFI_INSTRUCTION offset $r14, -32
    CFI_INSTRUCTION offset $r15, -24
    CFI_INSTRUCTION offset $rbp, -16
    MOV64mr $rsp, 1, $noreg, -8, $noreg, killed renamable $rdi :: (store 8 into %stack.0)
    INLINEASM &"", 1, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15, 12, implicit-def dead early-clobber $eflags, !20, debug-location !18
    renamable $rdi = MOV64rm $rsp, 1, $noreg, -8, $noreg :: (load 8 from %stack.0)
    $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 48
    $r12 = frame-destroy POP64r implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 40
    $r13 = frame-destroy POP64r implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 32
    $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 24
    $r15 = frame-destroy POP64r implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 16
    $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 8
  
  bb.2.if.end:
    liveins: $rdi, $rbx, $r12, $r13, $r14, $r15, $rbp
  
    renamable $eax = MOV32rm killed renamable $rdi, 1, $noreg, 4, $noreg, debug-location !23 :: (load 4 from %ir.add.ptr, !tbaa !24)
    RETQ $eax, debug-location !28

...