; LLVM IR from Dev-XYS/Algorithms :: Min-Heap.ll (Z6inserti)

; 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"

@H = external dso_local global [100000 x i32], align 16
@heapsize = external dso_local global i32, align 4

; 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 nounwind uwtable
define dso_local void @_Z6inserti(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = load i32, ptr @heapsize, align 4, !tbaa !5
  %8 = add nsw i32 %7, 1
  store i32 %8, ptr @heapsize, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %9
  store i32 %6, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %11 = load i32, ptr @heapsize, align 4, !tbaa !5
  store i32 %11, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %12 = load i32, ptr @heapsize, align 4, !tbaa !5
  %13 = ashr i32 %12, 1
  store i32 %13, ptr %4, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %29, %1
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp sgt i32 %18, %22
  br i1 %23, label %24, label %27

24:                                               ; preds = %14
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = icmp sge i32 %25, 1
  br label %27

27:                                               ; preds = %24, %14
  %28 = phi i1 [ false, %14 ], [ %26, %24 ]
  br i1 %28, label %29, label %48

29:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  store i32 %33, ptr %5, align 4, !tbaa !5
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = load i32, ptr %4, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %39
  store i32 %37, ptr %40, align 4, !tbaa !5
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %43
  store i32 %41, ptr %44, align 4, !tbaa !5
  %45 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %45, ptr %3, align 4, !tbaa !5
  %46 = load i32, ptr %4, align 4, !tbaa !5
  %47 = ashr i32 %46, 1
  store i32 %47, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %14, !llvm.loop !9

48:                                               ; preds = %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@H = external dso_local local_unnamed_addr global [100000 x i32], align 16
@heapsize = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: write, inaccessiblemem: none) uwtable
define dso_local void @_Z6inserti(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @heapsize, align 4, !tbaa !5
  %3 = add nsw i32 %2, 1
  store i32 %3, ptr @heapsize, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %4
  store i32 %0, ptr %5, align 4, !tbaa !5
  %6 = ashr i32 %3, 1
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, %0
  %11 = icmp sgt i32 %6, 0
  %12 = and i1 %11, %10
  br i1 %12, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %13 = phi i32 [ %23, %.lr.ph ], [ %0, %1 ]
  %14 = phi ptr [ %22, %.lr.ph ], [ %5, %1 ]
  %15 = phi i32 [ %20, %.lr.ph ], [ %9, %1 ]
  %16 = phi ptr [ %19, %.lr.ph ], [ %8, %1 ]
  %.01114 = phi i32 [ %17, %.lr.ph ], [ %6, %1 ]
  store i32 %13, ptr %16, align 4, !tbaa !5
  store i32 %15, ptr %14, align 4, !tbaa !5
  %17 = lshr i32 %.01114, 1
  %18 = zext nneg i32 %17 to i64
  %19 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = zext nneg i32 %.01114 to i64
  %22 = getelementptr inbounds [100000 x i32], ptr @H, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = icmp sgt i32 %20, %23
  %25 = icmp ugt i32 %.01114, 1
  %26 = and i1 %25, %24
  br i1 %26, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: write, inaccessiblemem: none) 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass