; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 18. Greedy/kruskals_msp.ll (Z15findMinimumEdgev)

; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@graph = external dso_local global [6 x [6 x i32]], align 16
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15findMinimumEdgev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %63, %0
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = icmp slt i32 %7, 6
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  br label %66

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 99999, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %44, %10
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = icmp slt i32 %12, 6
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  store i32 5, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %47

15:                                               ; preds = %11
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %17
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [6 x i32], ptr %18, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp ne i32 %22, 0
  br i1 %23, label %24, label %43

24:                                               ; preds = %15
  %25 = load i32, ptr %1, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %26
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [6 x i32], ptr %27, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = icmp slt i32 %31, %32
  br i1 %33, label %34, label %43

34:                                               ; preds = %24
  %35 = load i32, ptr %1, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %36
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [6 x i32], ptr %37, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  store i32 %41, ptr %3, align 4, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %42, ptr %4, align 4, !tbaa !5
  br label %43

43:                                               ; preds = %34, %24, %15
  br label %44

44:                                               ; preds = %43
  %45 = load i32, ptr %5, align 4, !tbaa !5
  %46 = add nsw i32 %45, 1
  store i32 %46, ptr %5, align 4, !tbaa !5
  br label %11, !llvm.loop !9

47:                                               ; preds = %14
  %48 = load i32, ptr %1, align 4, !tbaa !5
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %48)
  %50 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %49, ptr noundef @.str)
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %50, i32 noundef %51)
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %52, ptr noundef @.str.1)
  %54 = load i32, ptr %1, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %55
  %57 = load i32, ptr %4, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds [6 x i32], ptr %56, i64 0, i64 %58
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %53, i32 noundef %60)
  %62 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %61, ptr noundef @.str.2)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %63

63:                                               ; preds = %47
  %64 = load i32, ptr %1, align 4, !tbaa !5
  %65 = add nsw i32 %64, 1
  store i32 %65, ptr %1, align 4, !tbaa !5
  br label %6, !llvm.loop !11

66:                                               ; preds = %9
  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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 = { "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 }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@graph = external dso_local local_unnamed_addr global [6 x [6 x i32]], align 16
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15findMinimumEdgev() local_unnamed_addr #0 {
  br label %.preheader

.preheader:                                       ; preds = %0, %.preheader
  %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %.preheader ]
  %1 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 0
  %2 = load i32, ptr %1, align 8, !tbaa !5
  %.not.not = icmp eq i32 %2, 0
  %3 = tail call i32 @llvm.smin.i32(i32 %2, i32 99999)
  %.118 = select i1 %.not.not, i32 99999, i32 %3
  %4 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 1
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not.1 = icmp ne i32 %5, 0
  %6 = icmp slt i32 %5, %.118
  %or.cond.1 = select i1 %.not.1, i1 %6, i1 false
  %.118.1 = select i1 %or.cond.1, i32 %5, i32 %.118
  %.1.1 = zext i1 %or.cond.1 to i32
  %7 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 2
  %8 = load i32, ptr %7, align 8, !tbaa !5
  %.not.2 = icmp ne i32 %8, 0
  %9 = icmp slt i32 %8, %.118.1
  %or.cond.2 = select i1 %.not.2, i1 %9, i1 false
  %.118.2 = select i1 %or.cond.2, i32 %8, i32 %.118.1
  %.1.2 = select i1 %or.cond.2, i32 2, i32 %.1.1
  %10 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 3
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %.not.3 = icmp ne i32 %11, 0
  %12 = icmp slt i32 %11, %.118.2
  %or.cond.3 = select i1 %.not.3, i1 %12, i1 false
  %.118.3 = select i1 %or.cond.3, i32 %11, i32 %.118.2
  %.1.3 = select i1 %or.cond.3, i32 3, i32 %.1.2
  %13 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 4
  %14 = load i32, ptr %13, align 8, !tbaa !5
  %.not.4 = icmp ne i32 %14, 0
  %15 = icmp slt i32 %14, %.118.3
  %or.cond.4 = select i1 %.not.4, i1 %15, i1 false
  %.118.4 = select i1 %or.cond.4, i32 %14, i32 %.118.3
  %.1.4 = select i1 %or.cond.4, i32 4, i32 %.1.3
  %16 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 5
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %.not.5 = icmp ne i32 %17, 0
  %18 = icmp slt i32 %17, %.118.4
  %or.cond.5 = select i1 %.not.5, i1 %18, i1 false
  %.1.5 = select i1 %or.cond.5, i32 5, i32 %.1.4
  %19 = trunc nuw nsw i64 %indvars.iv to i32
  %20 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %19)
  %21 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %20, ptr noundef nonnull @.str)
  %22 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %21, i32 noundef %.1.5)
  %23 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %22, ptr noundef nonnull @.str.1)
  %24 = zext nneg i32 %.1.5 to i64
  %25 = getelementptr inbounds [6 x [6 x i32]], ptr @graph, i64 0, i64 %indvars.iv, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %23, i32 noundef %26)
  %28 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %27, ptr noundef nonnull @.str.2)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 6
  br i1 %exitcond.not, label %29, label %.preheader, !llvm.loop !9

29:                                               ; preds = %.preheader
  ret void
}

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #3

attributes #0 = { 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 #1 = { inlinehint 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 #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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass