; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/math/n_queen.ll (Z11solveNqueenPA10_iii)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z6isSafePA10_iiii(ptr noundef, i32 noundef, i32 noundef, i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z11solveNqueenPA10_iii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #2 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i8, align 1
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %54

16:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %48, %16
  %18 = load i32, ptr %8, align 4, !tbaa !9
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  store i32 2, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %51

22:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %23

23:                                               ; preds = %43, %22
  %24 = load i32, ptr %10, align 4, !tbaa !9
  %25 = load i32, ptr %7, align 4, !tbaa !9
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  store i32 5, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  br label %46

28:                                               ; preds = %23
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [10 x i32], ptr %29, i64 %31
  %33 = load i32, ptr %10, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [10 x i32], ptr %32, i64 0, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = icmp eq i32 %36, 1
  br i1 %37, label %38, label %40

38:                                               ; preds = %28
  %39 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  br label %42

40:                                               ; preds = %28
  %41 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  br label %42

42:                                               ; preds = %40, %38
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %10, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %10, align 4, !tbaa !9
  br label %23, !llvm.loop !11

46:                                               ; preds = %27
  %47 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  br label %48

48:                                               ; preds = %46
  %49 = load i32, ptr %8, align 4, !tbaa !9
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %8, align 4, !tbaa !9
  br label %17, !llvm.loop !13

51:                                               ; preds = %21
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %52, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  store i1 false, ptr %4, align 1
  br label %101

54:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  store i32 0, ptr %11, align 4, !tbaa !9
  br label %55

55:                                               ; preds = %95, %54
  %56 = load i32, ptr %11, align 4, !tbaa !9
  %57 = load i32, ptr %7, align 4, !tbaa !9
  %58 = icmp slt i32 %56, %57
  br i1 %58, label %60, label %59

59:                                               ; preds = %55
  store i32 8, ptr %9, align 4
  br label %98

60:                                               ; preds = %55
  %61 = load ptr, ptr %5, align 8, !tbaa !5
  %62 = load i32, ptr %6, align 4, !tbaa !9
  %63 = load i32, ptr %11, align 4, !tbaa !9
  %64 = load i32, ptr %7, align 4, !tbaa !9
  %65 = call noundef zeroext i1 @_Z6isSafePA10_iiii(ptr noundef %61, i32 noundef %62, i32 noundef %63, i32 noundef %64)
  br i1 %65, label %66, label %94

66:                                               ; preds = %60
  %67 = load ptr, ptr %5, align 8, !tbaa !5
  %68 = load i32, ptr %6, align 4, !tbaa !9
  %69 = sext i32 %68 to i64
  %70 = getelementptr inbounds [10 x i32], ptr %67, i64 %69
  %71 = load i32, ptr %11, align 4, !tbaa !9
  %72 = sext i32 %71 to i64
  %73 = getelementptr inbounds [10 x i32], ptr %70, i64 0, i64 %72
  store i32 1, ptr %73, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %12) #4
  %74 = load ptr, ptr %5, align 8, !tbaa !5
  %75 = load i32, ptr %6, align 4, !tbaa !9
  %76 = add nsw i32 %75, 1
  %77 = load i32, ptr %7, align 4, !tbaa !9
  %78 = call noundef zeroext i1 @_Z11solveNqueenPA10_iii(ptr noundef %74, i32 noundef %76, i32 noundef %77)
  %79 = zext i1 %78 to i8
  store i8 %79, ptr %12, align 1, !tbaa !14
  %80 = load i8, ptr %12, align 1, !tbaa !14, !range !16, !noundef !17
  %81 = trunc i8 %80 to i1
  br i1 %81, label %82, label %83

82:                                               ; preds = %66
  store i1 true, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %91

83:                                               ; preds = %66
  %84 = load ptr, ptr %5, align 8, !tbaa !5
  %85 = load i32, ptr %6, align 4, !tbaa !9
  %86 = sext i32 %85 to i64
  %87 = getelementptr inbounds [10 x i32], ptr %84, i64 %86
  %88 = load i32, ptr %11, align 4, !tbaa !9
  %89 = sext i32 %88 to i64
  %90 = getelementptr inbounds [10 x i32], ptr %87, i64 0, i64 %89
  store i32 0, ptr %90, align 4, !tbaa !9
  store i32 0, ptr %9, align 4
  br label %91

91:                                               ; preds = %83, %82
  call void @llvm.lifetime.end.p0(i64 1, ptr %12) #4
  %92 = load i32, ptr %9, align 4
  switch i32 %92, label %98 [
    i32 0, label %93
  ]

93:                                               ; preds = %91
  br label %94

94:                                               ; preds = %93, %60
  br label %95

95:                                               ; preds = %94
  %96 = load i32, ptr %11, align 4, !tbaa !9
  %97 = add nsw i32 %96, 1
  store i32 %97, ptr %11, align 4, !tbaa !9
  br label %55, !llvm.loop !18

98:                                               ; preds = %91, %59
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  %99 = load i32, ptr %9, align 4
  switch i32 %99, label %103 [
    i32 8, label %100
    i32 1, label %101
  ]

100:                                              ; preds = %98
  store i1 false, ptr %4, align 1
  br label %101

101:                                              ; preds = %100, %98, %51
  %102 = load i1, ptr %4, align 1
  ret i1 %102

103:                                              ; preds = %98
  unreachable
}

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #3

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = !{!15, !15, i64 0}
!15 = !{!"bool", !7, i64 0}
!16 = !{i8 0, i8 2}
!17 = !{}
!18 = distinct !{!18, !12}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z6isSafePA10_iiii(ptr noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z11solveNqueenPA10_iii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %.preheader38, label %.preheader39

.preheader39:                                     ; preds = %3
  %5 = icmp sgt i32 %2, 0
  br i1 %5, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader39
  %6 = sext i32 %1 to i64
  %7 = add nsw i32 %1, 1
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %17

.preheader38:                                     ; preds = %3
  %8 = icmp sgt i32 %1, 0
  br i1 %8, label %.preheader.us.preheader, label %._crit_edge44

.preheader.us.preheader:                          ; preds = %.preheader38
  %wide.trip.count54 = zext nneg i32 %1 to i64
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv51 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next52, %._crit_edge.us ]
  br label %9

9:                                                ; preds = %.preheader.us, %9
  %indvars.iv46 = phi i64 [ 0, %.preheader.us ], [ %indvars.iv.next47, %9 ]
  %10 = getelementptr inbounds [10 x i32], ptr %0, i64 %indvars.iv51, i64 %indvars.iv46
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp eq i32 %11, 1
  %.str..str.1 = select i1 %12, ptr @.str, ptr @.str.1
  %13 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull %.str..str.1)
  %indvars.iv.next47 = add nuw nsw i64 %indvars.iv46, 1
  %exitcond50.not = icmp eq i64 %indvars.iv.next47, %wide.trip.count54
  br i1 %exitcond50.not, label %._crit_edge.us, label %9, !llvm.loop !9

._crit_edge.us:                                   ; preds = %9
  %14 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %indvars.iv.next52 = add nuw nsw i64 %indvars.iv51, 1
  %exitcond55.not = icmp eq i64 %indvars.iv.next52, %wide.trip.count54
  br i1 %exitcond55.not, label %._crit_edge44, label %.preheader.us, !llvm.loop !11

._crit_edge44:                                    ; preds = %._crit_edge.us, %.preheader38
  %15 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %16 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %15, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  br label %.loopexit

17:                                               ; preds = %.lr.ph, %23
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %23 ]
  %18 = trunc nuw nsw i64 %indvars.iv to i32
  %19 = tail call noundef zeroext i1 @_Z6isSafePA10_iiii(ptr noundef %0, i32 noundef %1, i32 noundef %18, i32 noundef %2)
  br i1 %19, label %20, label %23

20:                                               ; preds = %17
  %21 = getelementptr inbounds [10 x i32], ptr %0, i64 %6, i64 %indvars.iv
  store i32 1, ptr %21, align 4, !tbaa !5
  %22 = tail call noundef zeroext i1 @_Z11solveNqueenPA10_iii(ptr noundef %0, i32 noundef %7, i32 noundef %2)
  store i32 0, ptr %21, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %20, %17
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %17, !llvm.loop !12

.loopexit:                                        ; preds = %23, %.preheader39, %._crit_edge44
  ret i1 false
}

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #2

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass