; LLVM IR from hutusi/rethink-c :: src (heap)

; 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._Heap = type { ptr, ptr, ptr, i32, 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
define dso_local ptr @heap_pop(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct._Heap, ptr %5, i32 0, i32 4
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = icmp ule i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %36

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct._Heap, ptr %11, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %14 = getelementptr inbounds ptr, ptr %13, i64 0
  %15 = load ptr, ptr %14, align 8, !tbaa !5
  store ptr %15, ptr %4, align 8, !tbaa !5
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct._Heap, 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._Heap, ptr %19, i32 0, i32 4
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = sub i32 %21, 1
  %23 = zext i32 %22 to i64
  %24 = getelementptr inbounds ptr, ptr %18, i64 %23
  %25 = load ptr, ptr %24, align 8, !tbaa !5
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct._Heap, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !12
  %29 = getelementptr inbounds ptr, ptr %28, i64 0
  store ptr %25, ptr %29, align 8, !tbaa !5
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct._Heap, ptr %30, i32 0, i32 4
  %32 = load i32, ptr %31, align 4, !tbaa !9
  %33 = add i32 %32, -1
  store i32 %33, ptr %31, align 4, !tbaa !9
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  call void @heap_pop_heapify(ptr noundef %34)
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %35, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %36

36:                                               ; preds = %10, %9
  %37 = load ptr, ptr %2, align 8
  ret ptr %37
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @heap_pop_heapify(ptr noundef) #2

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 = { inlinehint 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, !11, i64 28}
!10 = !{!"_Heap", !6, i64 0, !6, i64 8, !6, i64 16, !11, i64 24, !11, i64 28, !11, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, 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
define dso_local ptr @heap_pop(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 28
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %12, label %5

5:                                                ; preds = %1
  %6 = load ptr, ptr %0, align 8, !tbaa !11
  %7 = load ptr, ptr %6, align 8, !tbaa !12
  %8 = add i32 %3, -1
  %9 = zext i32 %8 to i64
  %10 = getelementptr inbounds ptr, ptr %6, i64 %9
  %11 = load ptr, ptr %10, align 8, !tbaa !12
  store ptr %11, ptr %6, align 8, !tbaa !12
  store i32 %8, ptr %2, align 4, !tbaa !5
  tail call void @heap_pop_heapify(ptr noundef nonnull %0)
  br label %12

12:                                               ; preds = %1, %5
  %.0 = phi ptr [ %7, %5 ], [ null, %1 ]
  ret ptr %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @heap_pop_heapify(ptr noundef) local_unnamed_addr #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 = { inlinehint 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 28}
!6 = !{!"_Heap", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24, !10, i64 28, !10, i64 32}
!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 = !{!7, !7, i64 0}


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