test/DebugInfo/MIR/X86/live-debug-values-cutoffs.mir

# Test cutoffs for livedebugvalues debug range extension.
# Disable LDV if the input-bb-limit AND the input-dbg-value-limit are both exceeded.

# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown \
# RUN:   -livedebugvalues-input-bb-limit=1 \
# RUN:   -livedebugvalues-input-dbg-value-limit=1 \
# RUN:   | FileCheck %s -check-prefix=LDV-DISABLED

# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown \
# RUN:   -livedebugvalues-input-bb-limit=1 \
# RUN:   -livedebugvalues-input-dbg-value-limit=10 \
# RUN:   | FileCheck %s -check-prefix=LDV-ENABLED

# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown \
# RUN:   -livedebugvalues-input-bb-limit=10 \
# RUN:   -livedebugvalues-input-dbg-value-limit=1 \
# RUN:   | FileCheck %s -check-prefix=LDV-ENABLED

# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown \
# RUN:   -livedebugvalues-input-bb-limit=10 \
# RUN:   -livedebugvalues-input-dbg-value-limit=10 \
# RUN:   | FileCheck %s -check-prefix=LDV-ENABLED

# LDV-DISABLED-LABEL: bb.1.exit
# LDV-DISABLED-NEXT: $edi = MOV32rm

# LDV-ENABLED-LABEL: bb.1.exit
# LDV-ENABLED-NEXT: DBG_VALUE $rsp, 0, {{.*}}, !DIExpression(DW_OP_plus_uconst, 4)
# LDV-ENABLED-NEXT: $edi = MOV32rm

--- |
  target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

  declare i32 @use(i32)

  define i32 @foo(i32 %x) !dbg !6 {
  entry:
    %y = add i32 %x, %x, !dbg !12
    call void @llvm.dbg.value(metadata i32 %y, metadata !9, metadata !DIExpression()), !dbg !12
    br label %exit, !dbg !13

  exit:                                             ; preds = %entry
    %z = call i32 @use(i32 %y), !dbg !14
    call void @llvm.dbg.value(metadata i32 %z, metadata !11, metadata !DIExpression()), !dbg !14
    ret i32 %z, !dbg !15
  }

  declare void @llvm.dbg.value(metadata, metadata, metadata)

  !llvm.dbg.cu = !{!0}
  !llvm.debugify = !{!3, !4}
  !llvm.module.flags = !{!5}

  !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
  !1 = !DIFile(filename: "/tmp/t.ll", directory: "/")
  !2 = !{}
  !3 = !{i32 4}
  !4 = !{i32 2}
  !5 = !{i32 2, !"Debug Info Version", i32 3}
  !6 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
  !7 = !DISubroutineType(types: !2)
  !8 = !{!9, !11}
  !9 = !DILocalVariable(name: "1", scope: !6, file: !1, line: 1, type: !10)
  !10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
  !11 = !DILocalVariable(name: "2", scope: !6, file: !1, line: 3, type: !10)
  !12 = !DILocation(line: 1, column: 1, scope: !6)
  !13 = !DILocation(line: 2, column: 1, scope: !6)
  !14 = !DILocation(line: 3, column: 1, scope: !6)
  !15 = !DILocation(line: 4, column: 1, scope: !6)

...
---
name:            foo
liveins:
  - { reg: '$edi', virtual-reg: '' }
stack:
  - { id: 0, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
body:             |
  bb.0.entry:
    successors: %bb.1(0x80000000)
    liveins: $edi

    frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 16
    renamable $edi = ADD32rr renamable $edi, killed renamable $edi, implicit-def $eflags, debug-location !12
    DBG_VALUE renamable $edi, $noreg, !9, !DIExpression(), debug-location !12
    MOV32mr $rsp, 1, $noreg, 4, $noreg, killed $edi :: (store 4 into %stack.0)
    DBG_VALUE $rsp, 0, !9, !DIExpression(DW_OP_plus_uconst, 4), debug-location !12

  bb.1.exit:
    $edi = MOV32rm $rsp, 1, $noreg, 4, $noreg :: (load 4 from %stack.0)
    CALL64pcrel32 @use, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $eax, debug-location !14
    DBG_VALUE renamable $eax, $noreg, !11, !DIExpression(), debug-location !14
    $rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
    RETQ implicit killed $eax, debug-location !15

...