; LLVM IR from AllAlgorithms/c :: algorithms (pattern)

; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %58, %0
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %61

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #3
  store i8 65, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %30, %14
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sub nsw i32 %17, %18
  %20 = icmp sle i32 %16, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %15
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %33

22:                                               ; preds = %15
  %23 = load i8, ptr %5, align 1, !tbaa !9
  %24 = sext i8 %23 to i32
  %25 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %24)
  %26 = load i8, ptr %5, align 1, !tbaa !9
  %27 = sext i8 %26 to i32
  %28 = add nsw i32 %27, 1
  %29 = trunc i32 %28 to i8
  store i8 %29, ptr %5, align 1, !tbaa !9
  br label %30

30:                                               ; preds = %22
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %6, align 4, !tbaa !5
  br label %15, !llvm.loop !10

33:                                               ; preds = %21
  %34 = load i8, ptr %5, align 1, !tbaa !9
  %35 = sext i8 %34 to i32
  %36 = sub nsw i32 %35, 1
  %37 = trunc i32 %36 to i8
  store i8 %37, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 1, ptr %7, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %53, %33
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = load i32, ptr %2, align 4, !tbaa !5
  %41 = load i32, ptr %3, align 4, !tbaa !5
  %42 = sub nsw i32 %40, %41
  %43 = icmp sle i32 %39, %42
  br i1 %43, label %45, label %44

44:                                               ; preds = %38
  store i32 8, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %56

45:                                               ; preds = %38
  %46 = load i8, ptr %5, align 1, !tbaa !9
  %47 = sext i8 %46 to i32
  %48 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %47)
  %49 = load i8, ptr %5, align 1, !tbaa !9
  %50 = sext i8 %49 to i32
  %51 = sub nsw i32 %50, 1
  %52 = trunc i32 %51 to i8
  store i8 %52, ptr %5, align 1, !tbaa !9
  br label %53

53:                                               ; preds = %45
  %54 = load i32, ptr %7, align 4, !tbaa !5
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %7, align 4, !tbaa !5
  br label %38, !llvm.loop !12

56:                                               ; preds = %44
  %57 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #3
  br label %58

58:                                               ; preds = %56
  %59 = load i32, ptr %3, align 4, !tbaa !5
  %60 = add nsw i32 %59, 1
  store i32 %60, ptr %3, align 4, !tbaa !5
  br label %9, !llvm.loop !13

61:                                               ; preds = %13
  store i32 0, ptr %1, align 4
  store i32 1, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %62 = load i32, ptr %1, align 4
  ret i32 %62
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

declare i32 @printf(ptr noundef, ...) #2

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

attributes #0 = { 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 = { "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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}
!13 = distinct !{!13, !11}


; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.preheader18, label %._crit_edge27

.preheader18:                                     ; preds = %0, %._crit_edge
  %5 = phi i32 [ %15, %._crit_edge ], [ %3, %0 ]
  %.01626 = phi i32 [ %14, %._crit_edge ], [ 0, %0 ]
  %.not19.not = icmp sgt i32 %5, %.01626
  br i1 %.not19.not, label %.lr.ph, label %.preheader

._crit_edge27:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 0

.preheader:                                       ; preds = %.lr.ph, %.preheader18
  %6 = phi i32 [ %5, %.preheader18 ], [ %11, %.lr.ph ]
  %.015.lcssa = phi i8 [ 65, %.preheader18 ], [ %9, %.lr.ph ]
  %.not1722.not = icmp sgt i32 %6, %.01626
  br i1 %.not1722.not, label %.lr.ph25, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader18, %.lr.ph
  %.01421 = phi i32 [ %10, %.lr.ph ], [ 1, %.preheader18 ]
  %.01520 = phi i8 [ %9, %.lr.ph ], [ 65, %.preheader18 ]
  %7 = sext i8 %.01520 to i32
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %7)
  %9 = add i8 %.01520, 1
  %10 = add nuw nsw i32 %.01421, 1
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = sub nsw i32 %11, %.01626
  %.not.not = icmp slt i32 %.01421, %12
  br i1 %.not.not, label %.lr.ph, label %.preheader, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph25, %.preheader
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %14 = add nuw nsw i32 %.01626, 1
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %.preheader18, label %._crit_edge27, !llvm.loop !11

.lr.ph25:                                         ; preds = %.preheader, %.lr.ph25
  %.024 = phi i32 [ %19, %.lr.ph25 ], [ 1, %.preheader ]
  %.1.in23 = phi i8 [ %.1, %.lr.ph25 ], [ %.015.lcssa, %.preheader ]
  %.1 = add i8 %.1.in23, -1
  %17 = sext i8 %.1 to i32
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %17)
  %19 = add nuw nsw i32 %.024, 1
  %20 = load i32, ptr %1, align 4, !tbaa !5
  %21 = sub nsw i32 %20, %.01626
  %.not17.not = icmp slt i32 %.024, %21
  br i1 %.not17.not, label %.lr.ph25, label %._crit_edge, !llvm.loop !12
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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

attributes #0 = { nofree 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass