; LLVM IR from CodersForLife/Data-Structures-Algorithms :: Graphs/Kruskal.ll (Z4sortPiS_S_ii)

; 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"

; 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: mustprogress uwtable
define dso_local noundef i32 @_Z4sortPiS_S_ii(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3, i32 noundef %4) #1 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !9
  store i32 %4, ptr %10, align 4, !tbaa !9
  %12 = load i32, ptr %9, align 4, !tbaa !9
  %13 = load i32, ptr %10, align 4, !tbaa !9
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %15, label %40

15:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = load i32, ptr %10, align 4, !tbaa !9
  %18 = add nsw i32 %16, %17
  %19 = sdiv i32 %18, 2
  store i32 %19, ptr %11, align 4, !tbaa !9
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = load ptr, ptr %7, align 8, !tbaa !5
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = load i32, ptr %9, align 4, !tbaa !9
  %24 = load i32, ptr %11, align 4, !tbaa !9
  %25 = call noundef i32 @_Z4sortPiS_S_ii(ptr noundef %20, ptr noundef %21, ptr noundef %22, i32 noundef %23, i32 noundef %24)
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  %28 = load ptr, ptr %8, align 8, !tbaa !5
  %29 = load i32, ptr %11, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  %31 = load i32, ptr %10, align 4, !tbaa !9
  %32 = call noundef i32 @_Z4sortPiS_S_ii(ptr noundef %26, ptr noundef %27, ptr noundef %28, i32 noundef %30, i32 noundef %31)
  %33 = load ptr, ptr %6, align 8, !tbaa !5
  %34 = load ptr, ptr %7, align 8, !tbaa !5
  %35 = load ptr, ptr %8, align 8, !tbaa !5
  %36 = load i32, ptr %9, align 4, !tbaa !9
  %37 = load i32, ptr %11, align 4, !tbaa !9
  %38 = load i32, ptr %10, align 4, !tbaa !9
  %39 = call noundef i32 @_Z5mergePiS_S_iii(ptr noundef %33, ptr noundef %34, ptr noundef %35, i32 noundef %36, i32 noundef %37, i32 noundef %38)
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %40

40:                                               ; preds = %15, %5
  ret i32 0
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z5mergePiS_S_iii(ptr noundef, ptr noundef, ptr noundef, i32 noundef, i32 noundef, i32 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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 #3 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z4sortPiS_S_ii(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = icmp slt i32 %3, %4
  br i1 %6, label %7, label %common.ret20

common.ret20:                                     ; preds = %5, %7
  ret i32 0

7:                                                ; preds = %5
  %8 = add nsw i32 %4, %3
  %9 = sdiv i32 %8, 2
  %10 = tail call noundef i32 @_Z4sortPiS_S_ii(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3, i32 noundef %9)
  %11 = add nsw i32 %9, 1
  %12 = tail call noundef i32 @_Z4sortPiS_S_ii(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %11, i32 noundef %4)
  %13 = tail call noundef i32 @_Z5mergePiS_S_iii(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3, i32 noundef %9, i32 noundef %4)
  br label %common.ret20
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z5mergePiS_S_iii(ptr noundef, ptr noundef, ptr noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

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" }

!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)"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass