; LLVM IR from attractivechaos/klib :: kexpr (ke_destroy)

; 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.kexpr_s = type { i32, ptr }
%struct.ke1_s = type { i64, ptr, %union.anon, double, i64, ptr }
%union.anon = type { ptr }

; 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
declare void @free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @ke_destroy(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %40

8:                                                ; preds = %1
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %32, %8
  %10 = load i32, ptr %3, align 4, !tbaa !9
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.kexpr_s, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = icmp slt i32 %10, %13
  br i1 %14, label %15, label %35

15:                                               ; preds = %9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.kexpr_s, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds %struct.ke1_s, ptr %18, i64 %20
  %22 = getelementptr inbounds %struct.ke1_s, ptr %21, i32 0, i32 1
  %23 = load ptr, ptr %22, align 8, !tbaa !14
  call void @free(ptr noundef %23) #3
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.kexpr_s, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  %27 = load i32, ptr %3, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds %struct.ke1_s, ptr %26, i64 %28
  %30 = getelementptr inbounds %struct.ke1_s, ptr %29, i32 0, i32 5
  %31 = load ptr, ptr %30, align 8, !tbaa !18
  call void @free(ptr noundef %31) #3
  br label %32

32:                                               ; preds = %15
  %33 = load i32, ptr %3, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %3, align 4, !tbaa !9
  br label %9, !llvm.loop !19

35:                                               ; preds = %9
  %36 = load ptr, ptr %2, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.kexpr_s, ptr %36, i32 0, i32 1
  %38 = load ptr, ptr %37, align 8, !tbaa !13
  call void @free(ptr noundef %38) #3
  %39 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %39) #3
  store i32 0, ptr %4, align 4
  br label %40

40:                                               ; preds = %35, %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  %41 = load i32, ptr %4, align 4
  switch i32 %41, label %43 [
    i32 0, label %42
    i32 1, label %42
  ]

42:                                               ; preds = %40, %40
  ret void

43:                                               ; preds = %40
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"kexpr_s", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !6, i64 8}
!15 = !{!"ke1_s", !10, i64 0, !10, i64 2, !10, i64 3, !10, i64 3, !10, i64 4, !10, i64 5, !6, i64 8, !7, i64 16, !16, i64 24, !17, i64 32, !6, i64 40}
!16 = !{!"double", !7, i64 0}
!17 = !{!"long", !7, i64 0}
!18 = !{!15, !6, i64 40}
!19 = distinct !{!19, !20}
!20 = !{!"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"

%struct.ke1_s = type { i64, ptr, %union.anon, double, i64, ptr }
%union.anon = type { ptr }

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @ke_destroy(ptr noundef %0) local_unnamed_addr #1 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %18, label %.preheader

.preheader:                                       ; preds = %1
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %6 ]
  %7 = load ptr, ptr %5, align 8, !tbaa !11
  %8 = getelementptr inbounds %struct.ke1_s, ptr %7, i64 %indvars.iv, i32 1
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  tail call void @free(ptr noundef %9) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !11
  %11 = getelementptr inbounds %struct.ke1_s, ptr %10, i64 %indvars.iv, i32 5
  %12 = load ptr, ptr %11, align 8, !tbaa !16
  tail call void @free(ptr noundef %12) #2
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = load i32, ptr %0, align 8, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = icmp slt i64 %indvars.iv.next, %14
  br i1 %15, label %6, label %._crit_edge, !llvm.loop !17

._crit_edge:                                      ; preds = %6, %.preheader
  %16 = getelementptr inbounds i8, ptr %0, i64 8
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  tail call void @free(ptr noundef %17) #2
  tail call void @free(ptr noundef nonnull %0) #2
  br label %18

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

attributes #0 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { 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, !7, i64 0}
!6 = !{!"kexpr_s", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !10, i64 8}
!13 = !{!"ke1_s", !7, i64 0, !7, i64 2, !7, i64 3, !7, i64 3, !7, i64 4, !7, i64 5, !10, i64 8, !8, i64 16, !14, i64 24, !15, i64 32, !10, i64 40}
!14 = !{!"double", !8, i64 0}
!15 = !{!"long", !8, i64 0}
!16 = !{!13, !10, i64 40}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass