; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Non-Linear/Graph/Types of Graphs/Undirected Graph (main)

; 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.4 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local ptr @getUndirectedWeightedGraph(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: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

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

; Function Attrs: nounwind uwtable
declare dso_local void @addEdge(ptr noundef, i32 noundef, i32 noundef, i32 noundef) #0

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: nounwind uwtable
declare dso_local void @removeEdge(ptr noundef, i32 noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @getDegree(ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @getNeighbors(ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @printGraph(ptr noundef) #0

; 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
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  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
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %9 = call ptr @getUndirectedWeightedGraph(i32 noundef 5)
  store ptr %9, ptr %6, align 8, !tbaa !9
  %10 = load ptr, ptr %6, align 8, !tbaa !9
  call void @addEdge(ptr noundef %10, i32 noundef 1, i32 noundef 2, i32 noundef 10)
  %11 = load ptr, ptr %6, align 8, !tbaa !9
  call void @addEdge(ptr noundef %11, i32 noundef 1, i32 noundef 3, i32 noundef 1)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %12 = load ptr, ptr %6, align 8, !tbaa !9
  %13 = call i32 @getDegree(ptr noundef %12, i32 noundef 1)
  %14 = sext i32 %13 to i64
  %15 = mul i64 4, %14
  %16 = call noalias ptr @malloc(i64 noundef %15) #5
  store ptr %16, ptr %7, align 8, !tbaa !9
  %17 = load ptr, ptr %6, align 8, !tbaa !9
  %18 = call ptr @getNeighbors(ptr noundef %17, i32 noundef 1)
  store ptr %18, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %32, %2
  %20 = load i32, ptr %8, align 4, !tbaa !5
  %21 = load ptr, ptr %6, align 8, !tbaa !9
  %22 = call i32 @getDegree(ptr noundef %21, i32 noundef 1)
  %23 = icmp slt i32 %20, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %35

25:                                               ; preds = %19
  %26 = load ptr, ptr %7, align 8, !tbaa !9
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i32 noundef %30)
  br label %32

32:                                               ; preds = %25
  %33 = load i32, ptr %8, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %8, align 4, !tbaa !5
  br label %19, !llvm.loop !11

35:                                               ; preds = %24
  %36 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  %37 = load ptr, ptr %6, align 8, !tbaa !9
  call void @removeEdge(ptr noundef %37, i32 noundef 1, i32 noundef 2)
  %38 = load ptr, ptr %6, align 8, !tbaa !9
  call void @printGraph(ptr noundef %38)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  ret i32 0
}

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 = { nounwind allocsize(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 = { "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 allocsize(0) }

!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.4 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local ptr @getUndirectedWeightedGraph(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @addEdge(ptr noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @removeEdge(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @getDegree(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @getNeighbors(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @printGraph(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = tail call ptr @getUndirectedWeightedGraph(i32 noundef 5)
  tail call void @addEdge(ptr noundef %3, i32 noundef 1, i32 noundef 2, i32 noundef 10)
  tail call void @addEdge(ptr noundef %3, i32 noundef 1, i32 noundef 3, i32 noundef 1)
  %4 = tail call i32 @getDegree(ptr noundef %3, i32 noundef 1)
  %5 = tail call ptr @getNeighbors(ptr noundef %3, i32 noundef 1)
  %6 = tail call i32 @getDegree(ptr noundef %3, i32 noundef 1)
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  tail call void @removeEdge(ptr noundef %3, i32 noundef 1, i32 noundef 2)
  tail call void @printGraph(ptr noundef %3)
  ret i32 0

.lr.ph:                                           ; preds = %2, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %2 ]
  %9 = getelementptr inbounds i32, ptr %5, i64 %indvars.iv
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i32 noundef %10)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = tail call i32 @getDegree(ptr noundef %3, i32 noundef 1)
  %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 !9
}

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" }

!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"}


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