; LLVM IR from HarshCasper/NeoAlgo :: C/graphs (Kruskal_Algorithm)

; 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.edge_list = type { [30 x %struct.edge], i32 }
%struct.edge = type { i32, i32, i32 }

@spanlist = external dso_local global %struct.edge_list, align 4
@.str = external hidden unnamed_addr constant [14 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

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

3:                                                ; preds = %31, %0
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = load i32, ptr getelementptr inbounds (%struct.edge_list, ptr @spanlist, i32 0, i32 1), align 4, !tbaa !9
  %6 = icmp slt i32 %4, %5
  br i1 %6, label %7, label %34

7:                                                ; preds = %3
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [30 x %struct.edge], ptr @spanlist, i64 0, i64 %9
  %11 = getelementptr inbounds %struct.edge, ptr %10, i32 0, i32 0
  %12 = load i32, ptr %11, align 4, !tbaa !11
  %13 = load i32, ptr %1, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [30 x %struct.edge], ptr @spanlist, i64 0, i64 %14
  %16 = getelementptr inbounds %struct.edge, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 4, !tbaa !13
  %18 = load i32, ptr %1, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [30 x %struct.edge], ptr @spanlist, i64 0, i64 %19
  %21 = getelementptr inbounds %struct.edge, ptr %20, i32 0, i32 2
  %22 = load i32, ptr %21, align 4, !tbaa !14
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %12, i32 noundef %17, i32 noundef %22)
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = load i32, ptr %1, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [30 x %struct.edge], ptr @spanlist, i64 0, i64 %26
  %28 = getelementptr inbounds %struct.edge, ptr %27, i32 0, i32 2
  %29 = load i32, ptr %28, align 4, !tbaa !14
  %30 = add nsw i32 %24, %29
  store i32 %30, ptr %2, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %7
  %32 = load i32, ptr %1, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %1, align 4, !tbaa !5
  br label %3, !llvm.loop !15

34:                                               ; preds = %3
  %35 = load i32, ptr %2, align 4, !tbaa !5
  %36 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %35)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { "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 = !{!10, !6, i64 360}
!10 = !{!"edge_list", !7, i64 0, !6, i64 360}
!11 = !{!12, !6, i64 0}
!12 = !{!"edge", !6, i64 0, !6, i64 4, !6, i64 8}
!13 = !{!12, !6, i64 4}
!14 = !{!12, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"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.edge_list = type { [30 x %struct.edge], i32 }
%struct.edge = type { i32, i32, i32 }

@spanlist = external dso_local local_unnamed_addr global %struct.edge_list, align 4
@.str = external hidden unnamed_addr constant [14 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @print() local_unnamed_addr #0 {
  %1 = load i32, ptr getelementptr inbounds (i8, ptr @spanlist, i64 360), align 4, !tbaa !5
  %2 = icmp sgt i32 %1, 0
  br i1 %2, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %.010 = phi i32 [ %11, %.lr.ph ], [ 0, %0 ]
  %3 = getelementptr inbounds [30 x %struct.edge], ptr @spanlist, i64 0, i64 %indvars.iv
  %4 = load i32, ptr %3, align 4, !tbaa !10
  %5 = getelementptr inbounds i8, ptr %3, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !12
  %7 = getelementptr inbounds i8, ptr %3, i64 8
  %8 = load i32, ptr %7, align 4, !tbaa !13
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %4, i32 noundef %6, i32 noundef %8)
  %10 = load i32, ptr %7, align 4, !tbaa !13
  %11 = add nsw i32 %10, %.010
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = load i32, ptr getelementptr inbounds (i8, ptr @spanlist, i64 360), align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = icmp slt i64 %indvars.iv.next, %13
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !14

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.0.lcssa = phi i32 [ 0, %0 ], [ %11, %.lr.ph ]
  %15 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %.0.lcssa)
  ret void
}

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

!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, !9, i64 360}
!6 = !{!"edge_list", !7, i64 0, !9, i64 360}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!11, !9, i64 0}
!11 = !{!"edge", !9, i64 0, !9, i64 4, !9, i64 8}
!12 = !{!11, !9, i64 4}
!13 = !{!11, !9, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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