# RUN: llc %s -o - -experimental-debug-variable-locations \
# RUN:     -mtriple=x86_64-unknown-unknown \
# RUN:     -run-pass=livedebugvalues -livedebugvalues-max-stack-slots=0  | \
# RUN: FileCheck %s --implicit-check-not=DBG_VALUE
# RUN: llc %s -o - -experimental-debug-variable-locations \
# RUN:     -mtriple=x86_64-unknown-unknown \
# RUN:     -run-pass=livedebugvalues -livedebugvalues-max-stack-slots=100  | \
# RUN: FileCheck %s --check-prefixes=NOLIMIT --implicit-check-not=DBG_VALUE
#
# Test that spills of live values to the stack are NOT tracked by
# LiveDebugValues if an internal accounting limit is exceeded -- in this test,
# set to zero. This is to avoid scenarios where we track thousands of stack
# slots, which can show up with autogenerated code and/or asan.
#
# This is a copy of livedebugvalues_stackslot_subregs.mir, here the stack slot
#  limit is set to zero, meaning the spill shouldn't be tracked.
#
## Capture variable num,
# CHECK: ![[VARNUM:[0-9]+]] = !DILocalVariable
#
## There should be no variable location, just a single DBG_VALUE $noreg.
# CHECK:     DBG_VALUE $noreg
#
## And then another.
# CHECK:     DBG_VALUE $noreg
#
## Test that if there's no limit, we _do_ get some locations.
# NOLIMIT:      DBG_INSTR_REF 1, 0
# NOLIMIT-NEXT: DBG_VALUE $esi
#
# NOLIMIT:      DBG_INSTR_REF 5,
# NOLIMIT-NEXT: DBG_VALUE $rsp
--- |
  define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 {
  entry:
    ret i8 0, !dbg !12
  }

  declare dso_local void @ext(i64)

  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3, !4, !5, !6}
  !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
  !1 = !DIFile(filename: "foo.cpp", directory: ".")
  !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
  !3 = !{i32 2, !"Dwarf Version", i32 4}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = !{i32 1, !"wchar_size", i32 2}
  !6 = !{i32 7, !"PIC Level", i32 2}
  !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
  !8 = !DISubroutineType(types: !9)
  !9 = !{!2, !2}
  !10 = !{!11}
  !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2)
  !12 = !DILocation(line: 10, scope: !7)
...
---
name: test
tracksRegLiveness: true
liveins:
  - { reg: '$rdi', virtual-reg: '' }
stack:
  - { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
body:  |
  bb.0:
  liveins: $rdi, $rax, $rbx
    $eax = MOV32ri 0, debug-instr-number 1
    $edi = COPY $eax
    MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0)
    $rsi = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0)

    MOV64mr $rsp, 1, $noreg, 16, $noreg, $rbx :: (store 8 into %stack.0)
    $rax = MOV64ri 0
    $rdi = MOV64ri 0

    DBG_INSTR_REF 1, 0, !11, !DIExpression(), debug-location !12
    ; This shouldn't find anything -- we have disabled tracking of spills.

    ; In addition to plain spills, spills that are folded into instructions
    ; shouldn't be tracked either.
    INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 5, debug-location !12 :: (store (s32) into %stack.0)


    DBG_INSTR_REF 5, 1000000, !11, !DIExpression(), debug-location !12
    ; Shouldn't be able to find the reference to instr 5's memory operand.

    RET64 $rsi, debug-location !12
...