; LLVM IR from ravireddy07/cpp-book :: src/Algorithm-Based/Kruskals.ll (Z5find1iP3Set)

; 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.Set = type { i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5find1iP3Set(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds %class.Set, ptr %6, i64 %8
  %10 = getelementptr inbounds %class.Set, ptr %9, i32 0, i32 0
  %11 = load i32, ptr %10, align 4, !tbaa !11
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp ne i32 %11, %12
  br i1 %13, label %14, label %23

14:                                               ; preds = %2
  %15 = load ptr, ptr %5, align 8, !tbaa !9
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds %class.Set, ptr %15, i64 %17
  %19 = getelementptr inbounds %class.Set, ptr %18, i32 0, i32 0
  %20 = load i32, ptr %19, align 4, !tbaa !11
  %21 = load ptr, ptr %5, align 8, !tbaa !9
  %22 = call noundef i32 @_Z5find1iP3Set(i32 noundef %20, ptr noundef %21)
  store i32 %22, ptr %3, align 4
  br label %30

23:                                               ; preds = %2
  %24 = load ptr, ptr %5, align 8, !tbaa !9
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds %class.Set, ptr %24, i64 %26
  %28 = getelementptr inbounds %class.Set, ptr %27, i32 0, i32 0
  %29 = load i32, ptr %28, align 4, !tbaa !11
  store i32 %29, ptr %3, align 4
  br label %30

30:                                               ; preds = %23, %14
  %31 = load i32, ptr %3, align 4
  ret i32 %31
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS3Set", !6, i64 0, !6, 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"

%class.Set = type { i32, i32 }

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i32 @_Z5find1iP3Set(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %tailrecurse

tailrecurse:                                      ; preds = %tailrecurse, %2
  %.tr = phi i32 [ %0, %2 ], [ %5, %tailrecurse ]
  %3 = sext i32 %.tr to i64
  %4 = getelementptr inbounds %class.Set, ptr %1, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not = icmp eq i32 %5, %.tr
  br i1 %.not, label %6, label %tailrecurse

6:                                                ; preds = %tailrecurse
  ret i32 %.tr
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = !{!"_ZTS3Set", !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,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass