; LLVM IR from FOSS-UCSC/FOSSALGO :: algorithms/ar-slpsrt/c (ar_slpsrt)

; 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 [4 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %16, %2
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr %4, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, 1
  br i1 %9, label %10, label %14

10:                                               ; preds = %6
  %11 = call i32 @fork() #4
  %12 = icmp ne i32 %11, 0
  %13 = xor i1 %12, true
  br label %14

14:                                               ; preds = %10, %6
  %15 = phi i1 [ false, %6 ], [ %13, %10 ]
  br i1 %15, label %16, label %17

16:                                               ; preds = %14
  br label %6, !llvm.loop !11

17:                                               ; preds = %14
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds ptr, ptr %18, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = call i32 @atoi(ptr noundef %22) #5
  store i32 %23, ptr %4, align 4, !tbaa !5
  %24 = call i32 @sleep(i32 noundef %23)
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %25)
  %27 = call i32 @wait(ptr noundef null)
  ret i32 0
}

; Function Attrs: nounwind
declare i32 @fork() #1

declare i32 @sleep(i32 noundef) #2

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #3

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

declare i32 @wait(ptr noundef) #2

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 = { 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 #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 = { inlinehint nounwind willreturn memory(read) 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 }
attributes #5 = { nounwind willreturn memory(read) }

!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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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 [4 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %smin = tail call i32 @llvm.smin.i32(i32 %0, i32 2)
  %3 = add i32 %smin, -1
  br label %4

4:                                                ; preds = %6, %2
  %.0 = phi i32 [ %0, %2 ], [ %7, %6 ]
  %5 = icmp sgt i32 %.0, 2
  br i1 %5, label %6, label %.critedge

6:                                                ; preds = %4
  %7 = add nsw i32 %.0, -1
  %8 = tail call i32 @fork() #5
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %4, label %.critedge, !llvm.loop !5

.critedge:                                        ; preds = %4, %6
  %.lcssa = phi i32 [ %3, %4 ], [ %7, %6 ]
  %9 = sext i32 %.lcssa to i64
  %10 = getelementptr inbounds ptr, ptr %1, i64 %9
  %11 = load ptr, ptr %10, align 8, !tbaa !7
  %12 = tail call i32 @atoi(ptr nocapture noundef %11) #6
  %13 = tail call i32 @sleep(i32 noundef %12) #5
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %12)
  %15 = tail call i32 @wait(ptr noundef null) #5
  ret i32 0
}

; Function Attrs: nofree nounwind
declare i32 @fork() local_unnamed_addr #1

declare i32 @sleep(i32 noundef) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

declare i32 @wait(ptr noundef) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #4

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 = { 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 #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 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(read) }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass