; LLVM IR from TheAlgorithms/C-Plus-Plus :: greedy_algorithms/prims_minimum_spanning_tree.ll (Z9initilizev)

; 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.mst = type { i8, i32, i32 }

@MST_Array = external dso_local global [4 x %struct.mst], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z9initilizev() #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %2

2:                                                ; preds = %20, %0
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %4 = icmp slt i32 %3, 4
  br i1 %4, label %6, label %5

5:                                                ; preds = %2
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  br label %23

6:                                                ; preds = %2
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [4 x %struct.mst], ptr @MST_Array, i64 0, i64 %8
  %10 = getelementptr inbounds %struct.mst, ptr %9, i32 0, i32 0
  store i8 0, ptr %10, align 4, !tbaa !9
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [4 x %struct.mst], ptr @MST_Array, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.mst, ptr %13, i32 0, i32 1
  store i32 99999, ptr %14, align 4, !tbaa !12
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [4 x %struct.mst], ptr @MST_Array, i64 0, i64 %17
  %19 = getelementptr inbounds %struct.mst, ptr %18, i32 0, i32 2
  store i32 %15, ptr %19, align 4, !tbaa !13
  br label %20

20:                                               ; preds = %6
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %1, align 4, !tbaa !5
  br label %2, !llvm.loop !14

23:                                               ; preds = %5
  store i32 0, ptr getelementptr inbounds (%struct.mst, ptr @MST_Array, i32 0, i32 1), align 4, !tbaa !12
  ret void
}

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

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS3mst", !11, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!"bool", !7, i64 0}
!12 = !{!10, !6, i64 4}
!13 = !{!10, !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"

%struct.mst = type { i8, i32, i32 }

@MST_Array = external dso_local local_unnamed_addr global [4 x %struct.mst], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z9initilizev() local_unnamed_addr #0 {
  store i8 0, ptr @MST_Array, align 16, !tbaa !5
  store i32 0, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 8), align 8, !tbaa !11
  store i8 0, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 12), align 4, !tbaa !5
  store i32 99999, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 16), align 16, !tbaa !12
  store i32 1, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 20), align 4, !tbaa !11
  store i8 0, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 24), align 8, !tbaa !5
  store i32 99999, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 28), align 4, !tbaa !12
  store i32 2, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 32), align 16, !tbaa !11
  store i8 0, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 36), align 4, !tbaa !5
  store i32 99999, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 40), align 8, !tbaa !12
  store i32 3, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 44), align 4, !tbaa !11
  store i32 0, ptr getelementptr inbounds (i8, ptr @MST_Array, i64 4), align 4, !tbaa !12
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, 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 0}
!6 = !{!"_ZTS3mst", !7, i64 0, !10, i64 4, !10, i64 8}
!7 = !{!"bool", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 4}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass