; LLVM IR from tezc/sc :: linked-list (list_example)

; 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.user = type { ptr, %struct.sc_list }
%struct.sc_list = type { ptr, ptr }

@__const.main.users = external hidden unnamed_addr constant [5 x %struct.user], align 16
@.str.5 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [5 x %struct.user], align 16
  %3 = alloca %struct.sc_list, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 120, ptr %2) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %2, ptr align 16 @__const.main.users, i64 120, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #4
  call void @sc_list_init(ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %20, %0
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 5
  br i1 %9, label %11, label %10

10:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %23

11:                                               ; preds = %7
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [5 x %struct.user], ptr %2, i64 0, i64 %13
  %15 = getelementptr inbounds %struct.user, ptr %14, i32 0, i32 1
  call void @sc_list_init(ptr noundef %15)
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [5 x %struct.user], ptr %2, i64 0, i64 %17
  %19 = getelementptr inbounds %struct.user, ptr %18, i32 0, i32 1
  call void @sc_list_add_tail(ptr noundef %3, ptr noundef %19)
  br label %20

20:                                               ; preds = %11
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %4, align 4, !tbaa !5
  br label %7, !llvm.loop !9

23:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %24 = getelementptr inbounds %struct.sc_list, ptr %3, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !11
  store ptr %25, ptr %5, align 8, !tbaa !14
  br label %26

26:                                               ; preds = %36, %23
  %27 = load ptr, ptr %5, align 8, !tbaa !14
  %28 = icmp ne ptr %27, %3
  br i1 %28, label %29, label %40

29:                                               ; preds = %26
  %30 = load ptr, ptr %5, align 8, !tbaa !14
  %31 = getelementptr inbounds i8, ptr %30, i64 -8
  store ptr %31, ptr %6, align 8, !tbaa !14
  %32 = load ptr, ptr %6, align 8, !tbaa !14
  %33 = getelementptr inbounds %struct.user, ptr %32, i32 0, i32 0
  %34 = load ptr, ptr %33, align 8, !tbaa !15
  %35 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, ptr noundef %34)
  br label %36

36:                                               ; preds = %29
  %37 = load ptr, ptr %5, align 8, !tbaa !14
  %38 = getelementptr inbounds %struct.sc_list, ptr %37, i32 0, i32 0
  %39 = load ptr, ptr %38, align 8, !tbaa !11
  store ptr %39, ptr %5, align 8, !tbaa !14
  br label %26, !llvm.loop !17

40:                                               ; preds = %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 120, ptr %2) #4
  ret i32 0
}

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

; 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) #2

declare void @sc_list_init(ptr noundef) #3

declare void @sc_list_add_tail(ptr noundef, ptr noundef) #3

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

declare i32 @printf(ptr noundef, ...) #3

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !13, i64 0}
!12 = !{!"sc_list", !13, i64 0, !13, i64 8}
!13 = !{!"any pointer", !7, i64 0}
!14 = !{!13, !13, i64 0}
!15 = !{!16, !13, i64 0}
!16 = !{!"user", !13, i64 0, !12, i64 8}
!17 = distinct !{!17, !10}


; 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.user = type { ptr, %struct.sc_list }
%struct.sc_list = type { ptr, ptr }

@__const.main.users = external hidden unnamed_addr constant [5 x %struct.user], align 16
@.str.5 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
.preheader:
  %0 = alloca [5 x %struct.user], align 16
  %1 = alloca %struct.sc_list, align 8
  call void @llvm.lifetime.start.p0(i64 120, ptr nonnull %0) #5
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(120) %0, ptr noundef nonnull align 16 dereferenceable(120) @__const.main.users, i64 120, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #5
  call void @sc_list_init(ptr noundef nonnull %1) #5
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  call void @sc_list_init(ptr noundef nonnull %2) #5
  call void @sc_list_add_tail(ptr noundef nonnull %1, ptr noundef nonnull %2) #5
  %3 = getelementptr inbounds i8, ptr %0, i64 32
  call void @sc_list_init(ptr noundef nonnull %3) #5
  call void @sc_list_add_tail(ptr noundef nonnull %1, ptr noundef nonnull %3) #5
  %4 = getelementptr inbounds i8, ptr %0, i64 56
  call void @sc_list_init(ptr noundef nonnull %4) #5
  call void @sc_list_add_tail(ptr noundef nonnull %1, ptr noundef nonnull %4) #5
  %5 = getelementptr inbounds i8, ptr %0, i64 80
  call void @sc_list_init(ptr noundef nonnull %5) #5
  call void @sc_list_add_tail(ptr noundef nonnull %1, ptr noundef nonnull %5) #5
  %6 = getelementptr inbounds i8, ptr %0, i64 104
  call void @sc_list_init(ptr noundef nonnull %6) #5
  call void @sc_list_add_tail(ptr noundef nonnull %1, ptr noundef nonnull %6) #5
  %.0710 = load ptr, ptr %1, align 8, !tbaa !5
  %.not11 = icmp eq ptr %.0710, %1
  br i1 %.not11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.0712 = phi ptr [ %.07, %.lr.ph ], [ %.0710, %.preheader ]
  %7 = getelementptr inbounds i8, ptr %.0712, i64 -8
  %8 = load ptr, ptr %7, align 8, !tbaa !10
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, ptr noundef %8)
  %.07 = load ptr, ptr %.0712, align 8, !tbaa !5
  %.not = icmp eq ptr %.07, %1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #5
  call void @llvm.lifetime.end.p0(i64 120, ptr nonnull %0) #5
  ret i32 0
}

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

declare void @sc_list_init(ptr noundef) local_unnamed_addr #3

declare void @sc_list_add_tail(ptr noundef, ptr noundef) local_unnamed_addr #3

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

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #4

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 #4 = { nofree 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 #5 = { 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 = !{!"sc_list", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 0}
!11 = !{!"user", !7, i64 0, !6, i64 8}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass