; LLVM IR from kenjin/Awesome-LC-C-Cracker :: leetcode-c-sol/0215_Kth-Largest-Element-in-an-Array (findKthLargest)

; 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: nounwind uwtable
define dso_local i32 @findKthLargest(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i32, ptr %5, align 4, !tbaa !9
  call void @create_heap(ptr noundef %9, i32 noundef %10)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %21, %3
  %12 = load i32, ptr %8, align 4, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %24

16:                                               ; preds = %11
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr %5, align 4, !tbaa !9
  %20 = call i32 @del_max_heap(ptr noundef %17, i32 noundef %18)
  store i32 %20, ptr %7, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %16
  %22 = load i32, ptr %8, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %8, align 4, !tbaa !9
  br label %11, !llvm.loop !11

24:                                               ; preds = %15
  %25 = load i32, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %25
}

; Function Attrs: nounwind uwtable
declare hidden void @create_heap(ptr noundef, i32 noundef) #0

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

; Function Attrs: nounwind uwtable
declare hidden i32 @del_max_heap(ptr noundef, i32 noundef) #0

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

attributes #0 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

; Function Attrs: nounwind uwtable
define dso_local i32 @findKthLargest(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  tail call void @create_heap(ptr noundef %0, i32 noundef %1)
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.07.lcssa = phi i32 [ 0, %3 ], [ %6, %.lr.ph ]
  ret i32 %.07.lcssa

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.010 = phi i32 [ %7, %.lr.ph ], [ 0, %3 ]
  %.089 = phi i32 [ %5, %.lr.ph ], [ %1, %3 ]
  %5 = add nsw i32 %.089, -1
  %6 = tail call i32 @del_max_heap(ptr noundef %0, i32 noundef %.089)
  %7 = add nuw nsw i32 %.010, 1
  %exitcond.not = icmp eq i32 %7, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5
}

; Function Attrs: nounwind uwtable
declare hidden void @create_heap(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @del_max_heap(ptr noundef, i32 noundef) local_unnamed_addr #0

attributes #0 = { 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)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass