; LLVM IR from yudi-matsuzake/libgenerics :: src (queue)

; 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.queue_t = type { i64, i64, ptr, ptr }
%struct.qnode_t = type { ptr, ptr, ptr }

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

9:                                                ; preds = %2
  store i32 1, ptr %3, align 4
  br label %77

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %11 = call noalias ptr @malloc(i64 noundef 24) #5
  store ptr %11, ptr %6, align 8, !tbaa !5
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.queue_t, ptr %12, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !9
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %16, label %23

16:                                               ; preds = %10
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.queue_t, ptr %17, i32 0, i32 1
  %19 = load i64, ptr %18, align 8, !tbaa !9
  %20 = call noalias ptr @malloc(i64 noundef %19) #5
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.qnode_t, ptr %21, i32 0, i32 2
  store ptr %20, ptr %22, align 8, !tbaa !12
  br label %26

23:                                               ; preds = %10
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.qnode_t, ptr %24, i32 0, i32 2
  store ptr null, ptr %25, align 8, !tbaa !12
  br label %26

26:                                               ; preds = %23, %16
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.qnode_t, ptr %27, i32 0, i32 1
  store ptr null, ptr %28, align 8, !tbaa !14
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.qnode_t, ptr %29, i32 0, i32 0
  store ptr null, ptr %30, align 8, !tbaa !15
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.queue_t, ptr %31, i32 0, i32 1
  %33 = load i64, ptr %32, align 8, !tbaa !9
  %34 = icmp ne i64 %33, 0
  br i1 %34, label %35, label %46

35:                                               ; preds = %26
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = icmp ne ptr %36, null
  br i1 %37, label %38, label %46

38:                                               ; preds = %35
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.qnode_t, ptr %39, i32 0, i32 2
  %41 = load ptr, ptr %40, align 8, !tbaa !12
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.queue_t, ptr %43, i32 0, i32 1
  %45 = load i64, ptr %44, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %41, ptr align 1 %42, i64 %45, i1 false)
  br label %46

46:                                               ; preds = %38, %35, %26
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.queue_t, ptr %47, i32 0, i32 3
  %49 = load ptr, ptr %48, align 8, !tbaa !16
  %50 = icmp ne ptr %49, null
  br i1 %50, label %51, label %65

51:                                               ; preds = %46
  %52 = load ptr, ptr %6, align 8, !tbaa !5
  %53 = load ptr, ptr %4, align 8, !tbaa !5
  %54 = getelementptr inbounds %struct.queue_t, ptr %53, i32 0, i32 3
  %55 = load ptr, ptr %54, align 8, !tbaa !16
  %56 = getelementptr inbounds %struct.qnode_t, ptr %55, i32 0, i32 0
  store ptr %52, ptr %56, align 8, !tbaa !15
  %57 = load ptr, ptr %4, align 8, !tbaa !5
  %58 = getelementptr inbounds %struct.queue_t, ptr %57, i32 0, i32 3
  %59 = load ptr, ptr %58, align 8, !tbaa !16
  %60 = load ptr, ptr %6, align 8, !tbaa !5
  %61 = getelementptr inbounds %struct.qnode_t, ptr %60, i32 0, i32 1
  store ptr %59, ptr %61, align 8, !tbaa !14
  %62 = load ptr, ptr %6, align 8, !tbaa !5
  %63 = load ptr, ptr %4, align 8, !tbaa !5
  %64 = getelementptr inbounds %struct.queue_t, ptr %63, i32 0, i32 3
  store ptr %62, ptr %64, align 8, !tbaa !16
  br label %72

65:                                               ; preds = %46
  %66 = load ptr, ptr %6, align 8, !tbaa !5
  %67 = load ptr, ptr %4, align 8, !tbaa !5
  %68 = getelementptr inbounds %struct.queue_t, ptr %67, i32 0, i32 2
  store ptr %66, ptr %68, align 8, !tbaa !17
  %69 = load ptr, ptr %6, align 8, !tbaa !5
  %70 = load ptr, ptr %4, align 8, !tbaa !5
  %71 = getelementptr inbounds %struct.queue_t, ptr %70, i32 0, i32 3
  store ptr %69, ptr %71, align 8, !tbaa !16
  br label %72

72:                                               ; preds = %65, %51
  %73 = load ptr, ptr %4, align 8, !tbaa !5
  %74 = getelementptr inbounds %struct.queue_t, ptr %73, i32 0, i32 0
  %75 = load i64, ptr %74, align 8, !tbaa !18
  %76 = add i64 %75, 1
  store i64 %76, ptr %74, align 8, !tbaa !18
  store i32 0, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %77

77:                                               ; preds = %72, %9
  %78 = load i32, ptr %3, align 4
  ret i32 %78
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind allocsize(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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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 8}
!10 = !{!"queue_t", !11, i64 0, !11, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !6, i64 16}
!13 = !{!"qnode_t", !6, i64 0, !6, i64 8, !6, i64 16}
!14 = !{!13, !6, i64 8}
!15 = !{!13, !6, i64 0}
!16 = !{!10, !6, i64 24}
!17 = !{!10, !6, i64 16}
!18 = !{!10, !11, 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: mustprogress nofree nounwind willreturn uwtable
define dso_local range(i32 0, 2) i32 @queue_enqueue(ptr noundef %0, ptr noundef readonly %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %21, label %3

3:                                                ; preds = %2
  %4 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #4
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %.not30 = icmp eq i64 %6, 0
  br i1 %.not30, label %.thread, label %7

.thread:                                          ; preds = %3
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %4, i8 0, i64 24, i1 false)
  br label %11

7:                                                ; preds = %3
  %8 = tail call noalias ptr @malloc(i64 noundef %6) #4
  %9 = getelementptr inbounds i8, ptr %4, i64 16
  store ptr %8, ptr %9, align 8, !tbaa !11
  %.not33 = icmp eq ptr %1, null
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %4, i8 0, i64 16, i1 false)
  br i1 %.not33, label %11, label %10

10:                                               ; preds = %7
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %8, ptr nonnull align 1 %1, i64 %6, i1 false)
  br label %11

11:                                               ; preds = %.thread, %10, %7
  %12 = getelementptr inbounds i8, ptr %0, i64 24
  %13 = load ptr, ptr %12, align 8, !tbaa !13
  %.not31 = icmp eq ptr %13, null
  br i1 %.not31, label %16, label %14

14:                                               ; preds = %11
  %15 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr %4, ptr %13, align 8, !tbaa !14
  store ptr %13, ptr %15, align 8, !tbaa !15
  br label %18

16:                                               ; preds = %11
  %17 = getelementptr inbounds i8, ptr %0, i64 16
  store ptr %4, ptr %17, align 8, !tbaa !16
  br label %18

18:                                               ; preds = %16, %14
  store ptr %4, ptr %12, align 8, !tbaa !13
  %19 = load i64, ptr %0, align 8, !tbaa !17
  %20 = add i64 %19, 1
  store i64 %20, ptr %0, align 8, !tbaa !17
  br label %21

21:                                               ; preds = %2, %18
  %.0 = phi i32 [ 0, %18 ], [ 1, %2 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

attributes #0 = { mustprogress nofree nounwind willreturn 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(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 #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { nounwind allocsize(0) }

!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 8}
!6 = !{!"queue_t", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 24}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!12, !10, i64 16}
!12 = !{!"qnode_t", !10, i64 0, !10, i64 8, !10, i64 16}
!13 = !{!6, !10, i64 24}
!14 = !{!12, !10, i64 0}
!15 = !{!12, !10, i64 8}
!16 = !{!6, !10, i64 16}
!17 = !{!6, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass