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

@cmc_alloc_node_default = external hidden global %struct.cmc_alloc_node, align 8

; 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: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @b_new_custom(ptr noundef %0, ptr noundef %1, ptr noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = icmp ne ptr %10, null
  br i1 %11, label %13, label %12

12:                                               ; preds = %3
  store ptr @cmc_alloc_node_default, ptr %6, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %12, %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.cmc_alloc_node, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = call ptr %16(i64 noundef 440)
  store ptr %17, ptr %8, align 8, !tbaa !5
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %21, label %20

20:                                               ; preds = %13
  store ptr null, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %39

21:                                               ; preds = %13
  %22 = load ptr, ptr %8, 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
  call void @llvm.memset.p0.i64(ptr align 8 %24, i8 0, i64 400, i1 false)
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.buffer, ptr %25, i32 0, i32 1
  store i64 0, ptr %26, align 8, !tbaa !11
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.buffer, ptr %27, i32 0, i32 2
  store i32 0, ptr %28, align 8, !tbaa !15
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.buffer, ptr %30, i32 0, i32 3
  store ptr %29, ptr %31, align 8, !tbaa !16
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.buffer, ptr %33, i32 0, i32 4
  store ptr %32, ptr %34, align 8, !tbaa !17
  %35 = load ptr, ptr %7, align 8, !tbaa !5
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.buffer, ptr %36, i32 0, i32 5
  store ptr %35, ptr %37, align 8, !tbaa !18
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %38, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %39

39:                                               ; preds = %21, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %40 = load ptr, ptr %4, align 8
  ret ptr %40
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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, !6, i64 0}
!10 = !{!"cmc_alloc_node", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!12, !13, i64 400}
!12 = !{!"buffer", !7, i64 0, !13, i64 400, !14, i64 408, !6, i64 416, !6, i64 424, !6, i64 432}
!13 = !{!"long", !7, i64 0}
!14 = !{!"int", !7, i64 0}
!15 = !{!12, !14, i64 408}
!16 = !{!12, !6, i64 416}
!17 = !{!12, !6, i64 424}
!18 = !{!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"

%struct.cmc_alloc_node = type { ptr, ptr, ptr, ptr }

@cmc_alloc_node_default = external hidden global %struct.cmc_alloc_node, align 8

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @b_new_custom(ptr noundef %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %.not = icmp eq ptr %1, null
  %spec.store.select = select i1 %.not, ptr @cmc_alloc_node_default, ptr %1
  %4 = load ptr, ptr %spec.store.select, align 8, !tbaa !5
  %5 = tail call ptr %4(i64 noundef 440) #2
  %.not15 = icmp eq ptr %5, null
  br i1 %.not15, label %10, label %6

6:                                                ; preds = %3
  %7 = getelementptr inbounds i8, ptr %5, i64 416
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(412) %5, i8 0, i64 412, i1 false)
  store ptr %0, ptr %7, align 8, !tbaa !10
  %8 = getelementptr inbounds i8, ptr %5, i64 424
  store ptr %spec.store.select, ptr %8, align 8, !tbaa !14
  %9 = getelementptr inbounds i8, ptr %5, i64 432
  store ptr %2, ptr %9, align 8, !tbaa !15
  br label %10

10:                                               ; preds = %3, %6
  ret ptr %5
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"cmc_alloc_node", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 416}
!11 = !{!"buffer", !8, i64 0, !12, i64 400, !13, i64 408, !7, i64 416, !7, i64 424, !7, i64 432}
!12 = !{!"long", !8, i64 0}
!13 = !{!"int", !8, i64 0}
!14 = !{!11, !7, i64 424}
!15 = !{!11, !7, i64 432}


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