; LLVM IR from AlgoGenesis/C :: Greedy Algorithms/Optimal merge (Program)

; 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.MinHeap = type { ptr, i32, i32 }

; 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: nounwind uwtable
declare dso_local void @minHeapify(ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @extractMin(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.MinHeap, ptr %5, i32 0, i32 2
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = icmp sle i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 -1, ptr %2, align 4
  br label %52

10:                                               ; preds = %1
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.MinHeap, ptr %11, i32 0, i32 2
  %13 = load i32, ptr %12, align 4, !tbaa !9
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %15, label %26

15:                                               ; preds = %10
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.MinHeap, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.MinHeap, ptr %19, i32 0, i32 2
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = add nsw i32 %21, -1
  store i32 %22, ptr %20, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %18, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !13
  store i32 %25, ptr %2, align 4
  br label %52

26:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.MinHeap, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !12
  %30 = getelementptr inbounds i32, ptr %29, i64 0
  %31 = load i32, ptr %30, align 4, !tbaa !13
  store i32 %31, ptr %4, align 4, !tbaa !13
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.MinHeap, ptr %32, i32 0, i32 0
  %34 = load ptr, ptr %33, align 8, !tbaa !12
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.MinHeap, ptr %35, i32 0, i32 2
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = sub nsw i32 %37, 1
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i32, ptr %34, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !13
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.MinHeap, ptr %42, i32 0, i32 0
  %44 = load ptr, ptr %43, align 8, !tbaa !12
  %45 = getelementptr inbounds i32, ptr %44, i64 0
  store i32 %41, ptr %45, align 4, !tbaa !13
  %46 = load ptr, ptr %3, align 8, !tbaa !5
  %47 = getelementptr inbounds %struct.MinHeap, ptr %46, i32 0, i32 2
  %48 = load i32, ptr %47, align 4, !tbaa !9
  %49 = add nsw i32 %48, -1
  store i32 %49, ptr %47, align 4, !tbaa !9
  %50 = load ptr, ptr %3, align 8, !tbaa !5
  call void @minHeapify(ptr noundef %50, i32 noundef 0)
  %51 = load i32, ptr %4, align 4, !tbaa !13
  store i32 %51, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %52

52:                                               ; preds = %26, %15, %9
  %53 = load i32, ptr %2, align 4
  ret i32 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !11, i64 12}
!10 = !{!"", !6, i64 0, !11, i64 8, !11, i64 12}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 0}
!13 = !{!11, !11, 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: nounwind uwtable
declare dso_local void @minHeapify(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @extractMin(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 12
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp slt i32 %3, 1
  br i1 %4, label %18, label %5

5:                                                ; preds = %1
  %6 = icmp eq i32 %3, 1
  %7 = load ptr, ptr %0, align 8, !tbaa !11
  br i1 %6, label %8, label %10

8:                                                ; preds = %5
  store i32 0, ptr %2, align 4, !tbaa !5
  %9 = load i32, ptr %7, align 4, !tbaa !12
  br label %18

10:                                               ; preds = %5
  %11 = load i32, ptr %7, align 4, !tbaa !12
  %12 = zext nneg i32 %3 to i64
  %13 = getelementptr i32, ptr %7, i64 %12
  %14 = getelementptr i8, ptr %13, i64 -4
  %15 = load i32, ptr %14, align 4, !tbaa !12
  store i32 %15, ptr %7, align 4, !tbaa !12
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = add nsw i32 %16, -1
  store i32 %17, ptr %2, align 4, !tbaa !5
  tail call void @minHeapify(ptr noundef nonnull %0, i32 noundef 0)
  br label %18

18:                                               ; preds = %1, %10, %8
  %.0 = phi i32 [ %9, %8 ], [ %11, %10 ], [ -1, %1 ]
  ret i32 %.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 = !{!6, !10, i64 12}
!6 = !{!"", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!10, !10, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass