# 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
# Then more functions added to test for extra behaviours with complex
# expressions:
#   'g': test for a crash from PR42773
#   'h': complex expressions should be restored
#   'i': spills should be restored across block boundaries

# #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);
# }

# Pick out DILocalVariable numbers for "p", "q" and "r" etc
# CHECK: ![[PVAR:[0-9]+]] = !DILocalVariable(name: "p",
# CHECK: ![[QVAR:[0-9]+]] = !DILocalVariable(name: "q",
# CHECK: ![[RVAR:[0-9]+]] = !DILocalVariable(name: "r",
# CHECK: ![[SVAR:[0-9]+]] = !DILocalVariable(name: "s",

# 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,{{.*}}![[PVAR]],{{.*}}!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,{{.*}}![[PVAR]], !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
  }
  
  define dso_local i32 @g(i32* readonly %p) local_unnamed_addr !dbg !107 {
  entry:
    call void @llvm.dbg.value(metadata i32* %p, metadata !113, metadata !DIExpression()), !dbg !114
    %tobool = icmp eq i32* %p, null, !dbg !115
    br i1 %tobool, label %if.end, label %if.then, !dbg !117
  
  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 !118, !srcloc !120
    br label %if.end, !dbg !121
  
  if.end:                                           ; preds = %entry, %if.then
    %add.ptr = getelementptr inbounds i32, i32* %p, i64 1, !dbg !122
    %0 = load i32, i32* %add.ptr, align 4, !dbg !123, !tbaa !24
    ret i32 %0, !dbg !128
  }
 
  define dso_local i32 @h(i32* readonly %p) local_unnamed_addr !dbg !207 {
  entry:
    call void @llvm.dbg.value(metadata i32* %p, metadata !213, metadata !DIExpression()), !dbg !214
    %tobool = icmp eq i32* %p, null, !dbg !215
    br i1 %tobool, label %if.end, label %if.then, !dbg !217
  
  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 !218, !srcloc !220
    br label %if.end, !dbg !221
  
  if.end:                                           ; preds = %entry, %if.then
    %add.ptr = getelementptr inbounds i32, i32* %p, i64 1, !dbg !222
    %0 = load i32, i32* %add.ptr, align 4, !dbg !223, !tbaa !24
    ret i32 %0, !dbg !228
  }
 
  define dso_local i32 @i(i32* readonly %p) local_unnamed_addr !dbg !307 {
  entry:
    br label %foo

  foo:
    call void @llvm.dbg.value(metadata i32* %p, metadata !313, metadata !DIExpression()), !dbg !314
    %tobool = icmp eq i32* %p, null, !dbg !315
    br i1 %tobool, label %if.end, label %if.then, !dbg !317
  
  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 !318, !srcloc !320
    br label %if.end, !dbg !321
  
  if.end:                                           ; preds = %entry, %if.then
    %add.ptr = getelementptr inbounds i32, i32* %p, i64 1, !dbg !322
    %0 = load i32, i32* %add.ptr, align 4, !dbg !323, !tbaa !24
    ret i32 %0, !dbg !328
  }

  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)
  !101 = !DIBasicType(name: "looong int", size: 64, encoding: DW_ATE_signed)
  !107 = distinct !DISubprogram(name: "g", scope: !0, file: !1, line: 105, type: !8, scopeLine: 105, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !112)
  !112 = !{!113}
  !113 = !DILocalVariable(name: "q", arg: 1, scope: !107, file: !1, line: 105, type: !101)
  !114 = !DILocation(line: 105, column: 12, scope: !107)
  !115 = !DILocation(line: 106, column: 7, scope: !116)
  !116 = distinct !DILexicalBlock(scope: !107, file: !1, line: 106, column: 7)
  !117 = !DILocation(line: 106, column: 7, scope: !107)
  !118 = !DILocation(line: 107, column: 5, scope: !119)
  !119 = distinct !DILexicalBlock(scope: !116, file: !1, line: 106, column: 10)
  !120 = !{i32 -2147471544}
  !121 = !DILocation(line: 108, column: 3, scope: !119)
  !122 = !DILocation(line: 109, column: 14, scope: !107)
  !123 = !DILocation(line: 109, column: 10, scope: !107)
  !128 = !DILocation(line: 109, column: 3, scope: !107)
  !201 = !DIBasicType(name: "looong int", size: 64, encoding: DW_ATE_signed)
  !207 = distinct !DISubprogram(name: "g", scope: !0, file: !1, line: 105, type: !8, scopeLine: 105, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !212)
  !212 = !{!213}
  !213 = !DILocalVariable(name: "r", arg: 1, scope: !207, file: !1, line: 105, type: !201)
  !214 = !DILocation(line: 105, column: 12, scope: !207)
  !215 = !DILocation(line: 106, column: 7, scope: !216)
  !216 = distinct !DILexicalBlock(scope: !207, file: !1, line: 106, column: 7)
  !217 = !DILocation(line: 106, column: 7, scope: !207)
  !218 = !DILocation(line: 107, column: 5, scope: !219)
  !219 = distinct !DILexicalBlock(scope: !216, file: !1, line: 106, column: 10)
  !220 = !{i32 -2147471544}
  !221 = !DILocation(line: 108, column: 3, scope: !219)
  !222 = !DILocation(line: 109, column: 14, scope: !207)
  !223 = !DILocation(line: 109, column: 10, scope: !207)
  !228 = !DILocation(line: 109, column: 3, scope: !207)
  !301 = !DIBasicType(name: "looong int", size: 64, encoding: DW_ATE_signed)
  !307 = distinct !DISubprogram(name: "g", scope: !0, file: !1, line: 105, type: !8, scopeLine: 105, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !312)
  !312 = !{!313}
  !313 = !DILocalVariable(name: "s", arg: 1, scope: !307, file: !1, line: 105, type: !301)
  !314 = !DILocation(line: 105, column: 12, scope: !307)
  !315 = !DILocation(line: 106, column: 7, scope: !316)
  !316 = distinct !DILexicalBlock(scope: !307, file: !1, line: 106, column: 7)
  !317 = !DILocation(line: 106, column: 7, scope: !307)
  !318 = !DILocation(line: 107, column: 5, scope: !319)
  !319 = distinct !DILexicalBlock(scope: !316, file: !1, line: 106, column: 10)
  !320 = !{i32 -2147471544}
  !321 = !DILocation(line: 108, column: 3, scope: !319)
  !322 = !DILocation(line: 109, column: 14, scope: !307)
  !323 = !DILocation(line: 109, column: 10, scope: !307)
  !328 = !DILocation(line: 109, column: 3, scope: !307)
...
---
name:            f
alignment:       16
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:         
  - { reg: '$rdi', virtual-reg: '' }
frameInfo:       
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       48
  offsetAdjustment: -48
  maxAlignment:    8
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 48
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      
  - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      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: default, 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

...
---
# This second function has been appended as a regression test against a
# crash, caused by expressions being created from spill restores that did
# not preserve fragment information. Test that no empty expressions are
# created at all, and the last block describes both variable fragments.

# CHECK-LABEL: name: g
# CHECK-NOT: !DIExpression()
# CHECK-LABEL: bb.2.if.end:
# CHECK:       DBG_VALUE $rdi, $noreg, ![[QVAR]], !DIExpression(DW_OP_LLVM_fragment, 0, 32)
# CHECK-NEXT:  DBG_VALUE $rbx, $noreg, ![[QVAR]], !DIExpression(DW_OP_LLVM_fragment, 32, 32)

name:            g
alignment:       16
tracksRegLiveness: true
liveins:         
  - { reg: '$rdi', virtual-reg: '' }
frameInfo:       
  stackSize:       48
  offsetAdjustment: -48
  maxAlignment:    8
  cvBytesOfCalleeSavedRegisters: 48
  localFrameSize:  0
fixedStack:      
  - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      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: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
constants:       []
body:             |
  bb.0.entry:
    successors: %bb.1(0x50000000)
    liveins: $rdi, $rbx, $r12, $r13, $r14, $r15, $rbp
  
    DBG_VALUE $rdi, $noreg, !113, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !114
    TEST64rr renamable $rdi, renamable $rdi, implicit-def $eflags, debug-location !115
    JMP_1 %bb.1, implicit $eflags, debug-location !117
  
  bb.1.if.then:
    successors: %bb.2(0x80000000)
    liveins: $rdi, $rbp, $r15, $r14, $r13, $r12, $rbx
  
    MOV64mr $rsp, 1, $noreg, -8, $noreg, killed renamable $rdi :: (store 8 into %stack.0)
    renamable $rdi = MOV64rm $rsp, 1, $noreg, -8, $noreg :: (load 8 from %stack.0)
  
  bb.2.if.end:
    liveins: $rdi, $rbx, $r12, $r13, $r14, $r15, $rbp
  
    DBG_VALUE $rbx, $noreg, !113, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !114
    MOV64mr $rsp, 1, $noreg, -8, $noreg, killed renamable $rbx :: (store 8 into %stack.0)
    renamable $rsi = MOV64rm $rsp, 1, $noreg, -8, $noreg :: (load 8 from %stack.0)

    renamable $eax = MOV32rm killed renamable $rsi, 1, $noreg, 4, $noreg, debug-location !123 :: (load 4 from %ir.add.ptr, !tbaa !24)
    $rdi = MOV64ri 0
    RETQ $eax, debug-location !128

...
---
# This third function tests that complex expressions are spilt, and restored
# correctly within a basic block.

# FIXME: the spilt location below is wrong, there should be a deref between
# the spill-offset and the DW_OP_plus_uconst.

# CHECK-LABEL: name: h
# CHECK-LABEL: bb.0.entry:
# CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
# CHECK-LABEL: bb.1.if.then:
# CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
# CHECK:       DBG_VALUE $rsp, 0, ![[RVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
# CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
# CHECK-LABEL: bb.2.if.end:
# CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)

name:            h
alignment:       16
tracksRegLiveness: true
liveins:         
  - { reg: '$rdi', virtual-reg: '' }
frameInfo:       
  stackSize:       48
  offsetAdjustment: -48
  maxAlignment:    8
  cvBytesOfCalleeSavedRegisters: 48
  localFrameSize:  0
fixedStack:      
  - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$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: default,
      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: default, 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, !213, !DIExpression(DW_OP_plus_uconst, 1), debug-location !214
    TEST64rr renamable $rdi, renamable $rdi, implicit-def $eflags, debug-location !215
    JCC_1 %bb.2, 4, implicit $eflags, debug-location !217
  
  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, !220, debug-location !218
    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 !223 :: (load 4 from %ir.add.ptr, !tbaa !24)
    RETQ $eax, debug-location !228



...
---
# Function four: test that spill restores are detected across block
# boundaries. The spill has been moved to bb.1, children of which are
# bb 2 and 3, neither of which modifies the stack loc. The exit block (3)
# should still be tracking the spill, and restore it on stack load.

# FIXME: this test too contains a broken spill location.

# Summary: loc is in $rdi in bb0, spills to stack in bb1, remains in stack
# in bb2, starts in stack then loaded in bb3.

# CHECK-LABEL: name: i
# CHECK-LABEL: bb.0.entry:
# CHECK:       DBG_VALUE $rdi, $noreg, ![[SVAR]], !DIExpression(DW_OP_plus_uconst, 1)
# CHECK-LABEL: bb.1.foo:
# CHECK:       DBG_VALUE $rdi, $noreg, ![[SVAR]], !DIExpression(DW_OP_plus_uconst, 1)
# CHECK:       DBG_VALUE $rsp, 0, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
# CHECK-LABEL: bb.2.if.then:
# CHECK:       DBG_VALUE $rsp, 0, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
# CHECK-LABEL: bb.3.if.end
# CHECK:       DBG_VALUE $rsp, 0, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
# CHECK:       DBG_VALUE $rdi, $noreg, ![[SVAR]], !DIExpression(DW_OP_plus_uconst, 1)
name:            i
alignment:       16
tracksRegLiveness: true
liveins:         
  - { reg: '$rdi', virtual-reg: '' }
frameInfo:       
  stackSize:       48
  offsetAdjustment: -48
  maxAlignment:    8
  cvBytesOfCalleeSavedRegisters: 48
  localFrameSize:  0
fixedStack:      
  - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default,
      callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r13', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default,
      callee-saved-register: '$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: default,
      callee-saved-register: '$r15', callee-saved-restored: true, debug-info-variable: '', 
      debug-info-expression: '', debug-info-location: '' }
  - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
      callee-saved-register: '$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: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
constants:       []
body:             |
  bb.0.entry:
    successors: %bb.1
    liveins: $rdi, $rbx, $r12, $r13, $r14, $r15, $rbp

    DBG_VALUE $rdi, $noreg, !313, !DIExpression(DW_OP_plus_uconst, 1), debug-location !314
    JMP_1 %bb.1, debug-location !317

  bb.1.foo:
    successors: %bb.3(0x30000000), %bb.2(0x50000000)
    liveins: $rdi, $rbx, $r12, $r13, $r14, $r15, $rbp
  
    $rax = COPY $rdi
    MOV64mr $rsp, 1, $noreg, -8, $noreg, killed renamable $rdi :: (store 8 into %stack.0)
    $rdi = MOV64ri 0
    TEST64rr $rax, renamable $rax, implicit-def $eflags, debug-location !315
    JCC_1 %bb.3, 4, implicit $eflags, debug-location !317
  
  bb.2.if.then:
    successors: %bb.3(0x80000000)
    liveins: $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
    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, !320, debug-location !318
    $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.3.if.end:
    liveins: $rbx, $r12, $r13, $r14, $r15, $rbp
  
    renamable $rdi = MOV64rm $rsp, 1, $noreg, -8, $noreg :: (load 8 from %stack.0)
    renamable $eax = MOV32rm killed renamable $rdi, 1, $noreg, 4, $noreg, debug-location !323 :: (load 4 from %ir.add.ptr, !tbaa !24)
    RETQ $eax, debug-location !328

...