; LLVM IR from masyagin1998/GCI :: src/lexer (token)

; 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.POS = type { ptr, i64, i64, i64, i64 }
%struct.TOKEN = type { i32, i32, %struct.FRAG, %union.anon }
%struct.FRAG = type { %struct.POS, %struct.POS }
%union.anon = type { i64, [24 x i8] }

; Function Attrs: nounwind uwtable
declare dso_local ptr @create_token() #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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.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 @pos_next(ptr dead_on_unwind writable sret(%struct.POS) align 8, ptr noundef) #3

; Function Attrs: nounwind uwtable
define dso_local void @token_read_unknown(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca %struct.POS, align 8
  %7 = alloca %struct.POS, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 40, ptr %6) #4
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %6, ptr align 8 %8, i64 40, i1 false), !tbaa.struct !9
  %9 = call ptr @create_token()
  store ptr %9, ptr %5, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %13, %2
  %11 = call i32 @pos_is_unknown(ptr noundef %6)
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %13, label %14

13:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 40, ptr %7) #4
  call void @pos_next(ptr dead_on_unwind writable sret(%struct.POS) align 8 %7, ptr noundef %6)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %6, ptr align 8 %7, i64 40, i1 false), !tbaa.struct !9
  call void @llvm.lifetime.end.p0(i64 40, ptr %7) #4
  br label %10, !llvm.loop !12

14:                                               ; preds = %10
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.TOKEN, ptr %15, i32 0, i32 0
  store i32 39, ptr %16, align 8, !tbaa !14
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.TOKEN, ptr %17, i32 0, i32 1
  store i32 4, ptr %18, align 4, !tbaa !19
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TOKEN, ptr %19, i32 0, i32 2
  %21 = getelementptr inbounds %struct.FRAG, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %21, ptr align 8 %22, i64 40, i1 false), !tbaa.struct !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.TOKEN, ptr %23, i32 0, i32 2
  %25 = getelementptr inbounds %struct.FRAG, ptr %24, i32 0, i32 1
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %25, ptr align 8 %6, i64 40, i1 false), !tbaa.struct !9
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %26, ptr %27, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 40, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret void
}

declare i32 @pos_is_unknown(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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{i64 0, i64 8, !5, i64 8, i64 8, !10, i64 16, i64 8, !10, i64 24, i64 8, !10, i64 32, i64 8, !10}
!10 = !{!11, !11, i64 0}
!11 = !{!"long", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!15, !16, i64 0}
!15 = !{!"TOKEN", !16, i64 0, !16, i64 4, !17, i64 8, !7, i64 88}
!16 = !{!"int", !7, i64 0}
!17 = !{!"FRAG", !18, i64 0, !18, i64 40}
!18 = !{!"POS", !6, i64 0, !11, i64 8, !11, i64 16, !11, i64 24, !11, i64 32}
!19 = !{!15, !16, i64 4}


; 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.POS = type { ptr, i64, i64, i64, i64 }

; Function Attrs: nounwind uwtable
declare dso_local ptr @create_token() local_unnamed_addr #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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.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 @pos_next(ptr dead_on_unwind writable sret(%struct.POS) align 8, ptr noundef) local_unnamed_addr #3

; Function Attrs: nounwind uwtable
define dso_local void @token_read_unknown(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = alloca %struct.POS, align 8
  %4 = alloca %struct.POS, align 8
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %3) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(40) %3, ptr noundef nonnull align 8 dereferenceable(40) %1, i64 40, i1 false), !tbaa.struct !5
  %5 = tail call ptr @create_token()
  %6 = call i32 @pos_is_unknown(ptr noundef nonnull %3) #4
  %.not8 = icmp eq i32 %6, 0
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %4) #4
  call void @pos_next(ptr dead_on_unwind nonnull writable sret(%struct.POS) align 8 %4, ptr noundef nonnull %3) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(40) %3, ptr noundef nonnull align 8 dereferenceable(40) %4, i64 40, i1 false), !tbaa.struct !5
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %4) #4
  %7 = call i32 @pos_is_unknown(ptr noundef nonnull %3) #4
  %.not = icmp eq i32 %7, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %2
  store i32 39, ptr %5, align 8, !tbaa !14
  %8 = getelementptr inbounds i8, ptr %5, i64 4
  store i32 4, ptr %8, align 4, !tbaa !19
  %9 = getelementptr inbounds i8, ptr %5, i64 8
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(40) %9, ptr noundef nonnull align 8 dereferenceable(40) %1, i64 40, i1 false), !tbaa.struct !5
  %10 = getelementptr inbounds i8, ptr %5, i64 48
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(40) %10, ptr noundef nonnull align 8 dereferenceable(40) %3, i64 40, i1 false), !tbaa.struct !5
  store ptr %5, ptr %0, align 8, !tbaa !6
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %3) #4
  ret void
}

declare i32 @pos_is_unknown(ptr noundef) local_unnamed_addr #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 = { 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 = { 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 = !{i64 0, i64 8, !6, i64 8, i64 8, !10, i64 16, i64 8, !10, i64 24, i64 8, !10, i64 32, i64 8, !10}
!6 = !{!7, !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !11, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!15, !16, i64 0}
!15 = !{!"TOKEN", !16, i64 0, !16, i64 4, !17, i64 8, !8, i64 88}
!16 = !{!"int", !8, i64 0}
!17 = !{!"FRAG", !18, i64 0, !18, i64 40}
!18 = !{!"POS", !7, i64 0, !11, i64 8, !11, i64 16, !11, i64 24, !11, i64 32}
!19 = !{!15, !16, i64 4}


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