; LLVM IR from VAR-solutions/Algorithms :: Graphs/Kosaraju ALgorithm/Kosaraju_ALgorithm.ll (Z8scc_passv)

; 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"

%struct.vertices_s = type { i32, i32, [5 x i32] }

@vertices = external dso_local global [12 x %struct.vertices_s], align 16
@.str.2 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

declare i32 @printf(ptr noundef, ...) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z9stack_popv() #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3dfsii(i32 noundef, i32 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8scc_passv() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  br label %3

3:                                                ; preds = %19, %0
  %4 = call noundef i32 @_Z9stack_popv()
  store i32 %4, ptr %2, align 4, !tbaa !5
  %5 = icmp ne i32 %4, -1
  br i1 %5, label %6, label %20

6:                                                ; preds = %3
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [12 x %struct.vertices_s], ptr @vertices, i64 0, i64 %8
  %10 = getelementptr inbounds %struct.vertices_s, ptr %9, i32 0, i32 0
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %19, label %13

13:                                               ; preds = %6
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %1, align 4, !tbaa !5
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %15)
  %17 = load i32, ptr %2, align 4, !tbaa !5
  call void @_Z3dfsii(i32 noundef %17, i32 noundef 1)
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %19

19:                                               ; preds = %13, %6
  br label %3, !llvm.loop !11

20:                                               ; preds = %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  ret void
}

attributes #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 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 #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS10vertices_s", !6, i64 0, !6, i64 4, !7, i64 8}
!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"

%struct.vertices_s = type { i32, i32, [5 x i32] }

@vertices = external dso_local local_unnamed_addr global [12 x %struct.vertices_s], align 16
@.str.2 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z9stack_popv() local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3dfsii(i32 noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8scc_passv() local_unnamed_addr #2 {
  %1 = tail call noundef i32 @_Z9stack_popv()
  %.not5 = icmp eq i32 %1, -1
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %10
  %2 = phi i32 [ %11, %10 ], [ %1, %0 ]
  %.06 = phi i32 [ %.1, %10 ], [ 0, %0 ]
  %3 = sext i32 %2 to i64
  %4 = getelementptr inbounds [12 x %struct.vertices_s], ptr @vertices, i64 0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not4 = icmp eq i32 %5, 0
  br i1 %.not4, label %6, label %10

6:                                                ; preds = %.lr.ph
  %7 = add nsw i32 %.06, 1
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %7)
  tail call void @_Z3dfsii(i32 noundef %2, i32 noundef 1)
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  br label %10

10:                                               ; preds = %6, %.lr.ph
  %.1 = phi i32 [ %.06, %.lr.ph ], [ %7, %6 ]
  %11 = tail call noundef i32 @_Z9stack_popv()
  %.not = icmp eq i32 %11, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

._crit_edge:                                      ; preds = %10, %0
  ret void
}

attributes #0 = { 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 #1 = { 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 #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" }

!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, !7, i64 0}
!6 = !{!"_ZTS10vertices_s", !7, i64 0, !7, i64 4, !8, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass