; LLVM IR from LeoVen/C-Macro-Collections :: examples (callbacks)

; 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.buffer = type { [100 x i32], i64, i32, ptr, ptr, ptr }

@__func__.b_pop_at = external hidden unnamed_addr constant [9 x i8], align 1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @b_empty(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @b_pop_at(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = call zeroext i1 @b_empty(ptr noundef %7)
  br i1 %8, label %9, label %12

9:                                                ; preds = %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.buffer, ptr %10, i32 0, i32 2
  store i32 2, ptr %11, align 8, !tbaa !11
  store i1 false, ptr %3, align 1
  br label %60

12:                                               ; preds = %2
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.buffer, ptr %14, i32 0, i32 1
  %16 = load i64, ptr %15, align 8, !tbaa !14
  %17 = icmp uge i64 %13, %16
  br i1 %17, label %18, label %21

18:                                               ; preds = %12
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.buffer, ptr %19, i32 0, i32 2
  store i32 5, ptr %20, align 8, !tbaa !11
  store i1 false, ptr %3, align 1
  br label %60

21:                                               ; preds = %12
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.buffer, ptr %22, i32 0, i32 0
  %24 = getelementptr inbounds [100 x i32], ptr %23, i64 0, i64 0
  %25 = load i64, ptr %5, align 8, !tbaa !9
  %26 = getelementptr inbounds i32, ptr %24, i64 %25
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.buffer, ptr %27, i32 0, i32 0
  %29 = getelementptr inbounds [100 x i32], ptr %28, i64 0, i64 0
  %30 = load i64, ptr %5, align 8, !tbaa !9
  %31 = getelementptr inbounds i32, ptr %29, i64 %30
  %32 = getelementptr inbounds i32, ptr %31, i64 1
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.buffer, ptr %33, i32 0, i32 1
  %35 = load i64, ptr %34, align 8, !tbaa !14
  %36 = load i64, ptr %5, align 8, !tbaa !9
  %37 = sub i64 %35, %36
  %38 = sub i64 %37, 1
  %39 = mul i64 %38, 4
  call void @llvm.memmove.p0.p0.i64(ptr align 4 %26, ptr align 4 %32, i64 %39, i1 false)
  store i32 0, ptr %6, align 4, !tbaa !15
  %40 = load i32, ptr %6, align 4, !tbaa !15
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.buffer, ptr %41, i32 0, i32 0
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.buffer, ptr %43, i32 0, i32 1
  %45 = load i64, ptr %44, align 8, !tbaa !14
  %46 = add i64 %45, -1
  store i64 %46, ptr %44, align 8, !tbaa !14
  %47 = getelementptr inbounds [100 x i32], ptr %42, i64 0, i64 %46
  store i32 %40, ptr %47, align 4, !tbaa !15
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.buffer, ptr %48, i32 0, i32 2
  store i32 0, ptr %49, align 8, !tbaa !11
  %50 = load ptr, ptr %4, align 8, !tbaa !5
  %51 = getelementptr inbounds %struct.buffer, ptr %50, i32 0, i32 5
  %52 = load ptr, ptr %51, align 8, !tbaa !16
  %53 = icmp ne ptr %52, null
  br i1 %53, label %54, label %59

54:                                               ; preds = %21
  %55 = load ptr, ptr %4, align 8, !tbaa !5
  %56 = getelementptr inbounds %struct.buffer, ptr %55, i32 0, i32 5
  %57 = load ptr, ptr %56, align 8, !tbaa !16
  %58 = load ptr, ptr %4, align 8, !tbaa !5
  call void %57(ptr noundef @__func__.b_pop_at, ptr noundef %58)
  br label %59

59:                                               ; preds = %54, %21
  store i1 true, ptr %3, align 1
  br label %60

60:                                               ; preds = %59, %18, %9
  %61 = load i1, ptr %3, align 1
  ret i1 %61
}

attributes #0 = { nocallback nofree 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" }

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !13, i64 408}
!12 = !{!"buffer", !7, i64 0, !10, i64 400, !13, i64 408, !6, i64 416, !6, i64 424, !6, i64 432}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !10, i64 400}
!15 = !{!13, !13, i64 0}
!16 = !{!12, !6, i64 432}


; 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"

@__func__.b_pop_at = external hidden unnamed_addr constant [9 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @b_empty(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @b_pop_at(ptr noundef %0, i64 noundef %1) local_unnamed_addr #1 {
  %3 = tail call zeroext i1 @b_empty(ptr noundef %0)
  br i1 %3, label %4, label %6

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 408
  store i32 2, ptr %5, align 8, !tbaa !5
  br label %24

6:                                                ; preds = %2
  %7 = getelementptr inbounds i8, ptr %0, i64 400
  %8 = load i64, ptr %7, align 8, !tbaa !12
  %.not = icmp ugt i64 %8, %1
  br i1 %.not, label %11, label %9

9:                                                ; preds = %6
  %10 = getelementptr inbounds i8, ptr %0, i64 408
  store i32 5, ptr %10, align 8, !tbaa !5
  br label %24

11:                                               ; preds = %6
  %12 = getelementptr inbounds i32, ptr %0, i64 %1
  %13 = getelementptr inbounds i8, ptr %12, i64 4
  %14 = xor i64 %1, -1
  %15 = add i64 %8, %14
  %16 = shl i64 %15, 2
  tail call void @llvm.memmove.p0.p0.i64(ptr align 4 %12, ptr nonnull align 4 %13, i64 %16, i1 false)
  %17 = load i64, ptr %7, align 8, !tbaa !12
  %18 = add i64 %17, -1
  store i64 %18, ptr %7, align 8, !tbaa !12
  %19 = getelementptr inbounds [100 x i32], ptr %0, i64 0, i64 %18
  store i32 0, ptr %19, align 4, !tbaa !13
  %20 = getelementptr inbounds i8, ptr %0, i64 408
  store i32 0, ptr %20, align 8, !tbaa !5
  %21 = getelementptr inbounds i8, ptr %0, i64 432
  %22 = load ptr, ptr %21, align 8, !tbaa !14
  %.not21 = icmp eq ptr %22, null
  br i1 %.not21, label %24, label %23

23:                                               ; preds = %11
  tail call void %22(ptr noundef nonnull @__func__.b_pop_at, ptr noundef nonnull %0) #2
  br label %24

24:                                               ; preds = %11, %23, %9, %4
  %.0 = phi i1 [ false, %4 ], [ false, %9 ], [ true, %23 ], [ true, %11 ]
  ret i1 %.0
}

attributes #0 = { mustprogress nocallback nofree 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, !10, i64 408}
!6 = !{!"buffer", !7, i64 0, !9, i64 400, !10, i64 408, !11, i64 416, !11, i64 424, !11, i64 432}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"long", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!"any pointer", !7, i64 0}
!12 = !{!6, !9, i64 400}
!13 = !{!10, !10, i64 0}
!14 = !{!6, !11, i64 432}


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