; LLVM IR from tezc/sc :: string (sc_str)

; 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.sc_str = type { i32, [0 x i8] }

; 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: nounwind uwtable
declare hidden void @swap(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @sc_str_token_end(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  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) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store i32 1, ptr %6, align 4
  br label %27

10:                                               ; preds = %2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i64 -4
  %14 = getelementptr inbounds %struct.sc_str, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = zext i32 %15 to i64
  %17 = getelementptr inbounds i8, ptr %11, i64 %16
  store ptr %17, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = icmp eq i32 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %10
  store i32 1, ptr %6, align 4
  br label %27

23:                                               ; preds = %10
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  call void @swap(ptr noundef %24, ptr noundef %26)
  store i32 0, ptr %6, align 4
  br label %27

27:                                               ; preds = %23, %22, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  %28 = load i32, ptr %6, align 4
  switch i32 %28, label %30 [
    i32 0, label %29
    i32 1, label %29
  ]

29:                                               ; preds = %27, %27
  ret void

30:                                               ; preds = %27
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, 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: nounwind uwtable
declare hidden void @swap(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @sc_str_token_end(ptr noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %13, label %4

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 -4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = zext i32 %6 to i64
  %8 = getelementptr inbounds i8, ptr %0, i64 %7
  %9 = load i8, ptr %8, align 1, !tbaa !9
  %10 = icmp eq i8 %9, 0
  br i1 %10, label %13, label %11

11:                                               ; preds = %4
  %12 = load ptr, ptr %1, align 8, !tbaa !10
  tail call void @swap(ptr noundef nonnull %0, ptr noundef %12)
  br label %13

13:                                               ; preds = %4, %2, %11
  ret void
}

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" }

!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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"any pointer", !7, i64 0}


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