; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: Greedy/Kruskal’s Minimum Spanning Tree.ll (Z4findP6subseti)

; 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.subset = type { i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z4findP6subseti(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds %struct.subset, ptr %5, i64 %7
  %9 = getelementptr inbounds %struct.subset, ptr %8, i32 0, i32 0
  %10 = load i32, ptr %9, align 4, !tbaa !11
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp ne i32 %10, %11
  br i1 %12, label %13, label %27

13:                                               ; preds = %2
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds %struct.subset, ptr %15, i64 %17
  %19 = getelementptr inbounds %struct.subset, ptr %18, i32 0, i32 0
  %20 = load i32, ptr %19, align 4, !tbaa !11
  %21 = call noundef i32 @_Z4findP6subseti(ptr noundef %14, i32 noundef %20)
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds %struct.subset, ptr %22, i64 %24
  %26 = getelementptr inbounds %struct.subset, ptr %25, i32 0, i32 0
  store i32 %21, ptr %26, align 4, !tbaa !11
  br label %27

27:                                               ; preds = %13, %2
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = load i32, ptr %4, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds %struct.subset, ptr %28, i64 %30
  %32 = getelementptr inbounds %struct.subset, ptr %31, i32 0, i32 0
  %33 = load i32, ptr %32, align 4, !tbaa !11
  ret i32 %33
}

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" }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS6subset", !10, i64 0, !10, i64 4}


; 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.subset = type { i32, i32 }

; Function Attrs: mustprogress nofree nosync nounwind memory(argmem: readwrite) uwtable
define dso_local noundef i32 @_Z4findP6subseti(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %1 to i64
  %4 = getelementptr inbounds %struct.subset, ptr %0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not = icmp eq i32 %5, %1
  br i1 %.not, label %common.ret, label %6

common.ret:                                       ; preds = %2, %6
  %common.ret.op = phi i32 [ %7, %6 ], [ %1, %2 ]
  ret i32 %common.ret.op

6:                                                ; preds = %2
  %7 = tail call noundef i32 @_Z4findP6subseti(ptr noundef nonnull %0, i32 noundef %5)
  store i32 %7, ptr %4, align 4, !tbaa !5
  br label %common.ret
}

attributes #0 = { mustprogress nofree nosync nounwind memory(argmem: readwrite) 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 = !{!"_ZTS6subset", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass