; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Non-Linear/Graph/Types of Graphs/Directed Graph/Unweighted/C (isEdge)

; 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.DirectedUnweightedGraph = type { i32, i32, ptr }

; 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 zeroext i1 @isEdge(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %43, %3
  %11 = load i32, ptr %8, align 4, !tbaa !9
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.DirectedUnweightedGraph, ptr %12, i32 0, i32 1
  %14 = load i32, ptr %13, align 4, !tbaa !11
  %15 = icmp slt i32 %11, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %10
  store i32 2, ptr %9, align 4
  br label %46

17:                                               ; preds = %10
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.DirectedUnweightedGraph, ptr %18, i32 0, i32 2
  %20 = load ptr, ptr %19, align 8, !tbaa !13
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds ptr, ptr %20, i64 %22
  %24 = load ptr, ptr %23, align 8, !tbaa !5
  %25 = getelementptr inbounds i32, ptr %24, i64 0
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = icmp eq i32 %26, %27
  br i1 %28, label %29, label %42

29:                                               ; preds = %17
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.DirectedUnweightedGraph, ptr %30, i32 0, i32 2
  %32 = load ptr, ptr %31, align 8, !tbaa !13
  %33 = load i32, ptr %8, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds ptr, ptr %32, i64 %34
  %36 = load ptr, ptr %35, align 8, !tbaa !5
  %37 = getelementptr inbounds i32, ptr %36, i64 1
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = icmp eq i32 %38, %39
  br i1 %40, label %41, label %42

41:                                               ; preds = %29
  store i1 true, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %46

42:                                               ; preds = %29, %17
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %8, align 4, !tbaa !9
  br label %10, !llvm.loop !14

46:                                               ; preds = %41, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %47 = load i32, ptr %9, align 4
  switch i32 %47, label %51 [
    i32 2, label %48
    i32 1, label %49
  ]

48:                                               ; preds = %46
  store i1 false, ptr %4, align 1
  br label %49

49:                                               ; preds = %48, %46
  %50 = load i1, ptr %4, align 1
  ret i1 %50

51:                                               ; preds = %46
  unreachable
}

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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 4}
!12 = !{!"DirectedUnweightedGraph", !10, i64 0, !10, i64 4, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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"

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local zeroext i1 @isEdge(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i8, ptr %0, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not12 = icmp sgt i32 %5, 0
  br i1 %.not12, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = zext nneg i32 %5 to i64
  %wide.trip.count = zext nneg i32 %5 to i64
  br label %9

9:                                                ; preds = %.lr.ph, %18
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %18 ]
  %.not14 = phi i1 [ true, %.lr.ph ], [ %.not, %18 ]
  %10 = getelementptr inbounds ptr, ptr %7, i64 %indvars.iv
  %11 = load ptr, ptr %10, align 8, !tbaa !12
  %12 = load i32, ptr %11, align 4, !tbaa !13
  %13 = icmp eq i32 %12, %1
  br i1 %13, label %14, label %18

14:                                               ; preds = %9
  %15 = getelementptr inbounds i8, ptr %11, i64 4
  %16 = load i32, ptr %15, align 4, !tbaa !13
  %17 = icmp eq i32 %16, %2
  br i1 %17, label %._crit_edge, label %18

18:                                               ; preds = %9, %14
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %.not = icmp ult i64 %indvars.iv.next, %8
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %9, !llvm.loop !14

._crit_edge:                                      ; preds = %18, %14, %3
  %.not.lcssa = phi i1 [ false, %3 ], [ %.not14, %14 ], [ %.not, %18 ]
  ret i1 %.not.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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 4}
!6 = !{!"DirectedUnweightedGraph", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!10, !10, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass