; LLVM IR from maksimandrianov/cdcontainers :: src (pairing-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.cdc_pairing_heap = type { ptr, i64, ptr }
%struct.cdc_data_info = type { ptr, ptr, ptr, ptr, ptr, i64, i64 }

@.str.1 = external hidden unnamed_addr constant [81 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [2 x i8], align 1
@__PRETTY_FUNCTION__.cdc_pairing_heap_merge = external hidden unnamed_addr constant [64 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden ptr @meld(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @cdc_pairing_heap_merge(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = icmp ne ptr %5, null
  br i1 %6, label %7, label %8

7:                                                ; preds = %2
  br label %9

8:                                                ; preds = %2
  call void @__assert_fail(ptr noundef @.str.6, ptr noundef @.str.1, i32 noundef 288, ptr noundef @__PRETTY_FUNCTION__.cdc_pairing_heap_merge) #2
  unreachable

9:                                                ; preds = %7
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %13

12:                                               ; preds = %9
  br label %14

13:                                               ; preds = %9
  call void @__assert_fail(ptr noundef @.str.7, ptr noundef @.str.1, i32 noundef 289, ptr noundef @__PRETTY_FUNCTION__.cdc_pairing_heap_merge) #2
  unreachable

14:                                               ; preds = %12
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !9
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %21, i32 0, i32 2
  %23 = load ptr, ptr %22, align 8, !tbaa !12
  %24 = getelementptr inbounds %struct.cdc_data_info, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = call ptr @meld(ptr noundef %17, ptr noundef %20, ptr noundef %25)
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %27, i32 0, i32 0
  store ptr %26, ptr %28, align 8, !tbaa !9
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %29, i32 0, i32 1
  %31 = load i64, ptr %30, align 8, !tbaa !15
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %32, i32 0, i32 1
  %34 = load i64, ptr %33, align 8, !tbaa !15
  %35 = add i64 %34, %31
  store i64 %35, ptr %33, align 8, !tbaa !15
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %36, i32 0, i32 1
  store i64 0, ptr %37, align 8, !tbaa !15
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.cdc_pairing_heap, ptr %38, i32 0, i32 0
  store ptr null, ptr %39, align 8, !tbaa !9
  ret void
}

attributes #0 = { noreturn 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 #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 = { noreturn 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 = !{!"cdc_pairing_heap", !6, i64 0, !11, i64 8, !6, i64 16}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!14, !6, i64 8}
!14 = !{!"cdc_data_info", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !11, i64 40, !11, i64 48}
!15 = !{!10, !11, i64 8}


; 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"

@.str.1 = external hidden unnamed_addr constant [81 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [2 x i8], align 1
@__PRETTY_FUNCTION__.cdc_pairing_heap_merge = external hidden unnamed_addr constant [64 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden ptr @meld(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @cdc_pairing_heap_merge(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %3, label %4

3:                                                ; preds = %2
  tail call void @__assert_fail(ptr noundef nonnull @.str.6, ptr noundef nonnull @.str.1, i32 noundef 288, ptr noundef nonnull @__PRETTY_FUNCTION__.cdc_pairing_heap_merge) #3
  unreachable

4:                                                ; preds = %2
  %.not11 = icmp eq ptr %1, null
  br i1 %.not11, label %5, label %6

5:                                                ; preds = %4
  tail call void @__assert_fail(ptr noundef nonnull @.str.7, ptr noundef nonnull @.str.1, i32 noundef 289, ptr noundef nonnull @__PRETTY_FUNCTION__.cdc_pairing_heap_merge) #3
  unreachable

6:                                                ; preds = %4
  %7 = load ptr, ptr %0, align 8, !tbaa !5
  %8 = load ptr, ptr %1, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = getelementptr inbounds i8, ptr %10, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !12
  %13 = tail call ptr @meld(ptr noundef %7, ptr noundef %8, ptr noundef %12)
  store ptr %13, ptr %0, align 8, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %1, i64 8
  %15 = load i64, ptr %14, align 8, !tbaa !14
  %16 = getelementptr inbounds i8, ptr %0, i64 8
  %17 = load i64, ptr %16, align 8, !tbaa !14
  %18 = add i64 %17, %15
  store i64 %18, ptr %16, align 8, !tbaa !14
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %1, i8 0, i64 16, i1 false)
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { noreturn 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 #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { noreturn 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 = !{!"cdc_pairing_heap", !7, i64 0, !10, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 16}
!12 = !{!13, !7, i64 8}
!13 = !{!"cdc_data_info", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !10, i64 40, !10, i64 48}
!14 = !{!6, !10, i64 8}


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