; LLVM IR from openxrlab/xrsfm :: 3rdparty/apriltag/common (string_util)

; 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.string_feeder = type { ptr, i64, i64, i32, i32 }

@.str.1 = external hidden unnamed_addr constant [88 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.12 = external hidden unnamed_addr constant [19 x i8], align 1
@__PRETTY_FUNCTION__.string_feeder_require = external hidden unnamed_addr constant [60 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [12 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #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: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #2

; Function Attrs: nounwind uwtable
declare dso_local signext i8 @string_feeder_next(ptr noundef) #3

; Function Attrs: nounwind uwtable
define dso_local void @string_feeder_require(ptr noundef %0, ptr noundef %1) #3 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  br label %12

11:                                               ; preds = %2
  call void @__assert_fail(ptr noundef @.str.11, ptr noundef @.str.1, i32 noundef 514, ptr noundef @__PRETTY_FUNCTION__.string_feeder_require) #4
  unreachable

12:                                               ; preds = %10
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  br label %17

16:                                               ; preds = %12
  call void @__assert_fail(ptr noundef @.str.5, ptr noundef @.str.1, i32 noundef 515, ptr noundef @__PRETTY_FUNCTION__.string_feeder_require) #4
  unreachable

17:                                               ; preds = %15
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.string_feeder, ptr %18, i32 0, i32 2
  %20 = load i64, ptr %19, align 8, !tbaa !9
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.string_feeder, ptr %21, i32 0, i32 1
  %23 = load i64, ptr %22, align 8, !tbaa !13
  %24 = icmp ule i64 %20, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %17
  br label %27

26:                                               ; preds = %17
  call void @__assert_fail(ptr noundef @.str.12, ptr noundef @.str.1, i32 noundef 516, ptr noundef @__PRETTY_FUNCTION__.string_feeder_require) #4
  unreachable

27:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = call i64 @strlen(ptr noundef %28) #6
  store i64 %29, ptr %5, align 8, !tbaa !14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !15
  br label %30

30:                                               ; preds = %51, %27
  %31 = load i32, ptr %6, align 4, !tbaa !15
  %32 = sext i32 %31 to i64
  %33 = load i64, ptr %5, align 8, !tbaa !14
  %34 = icmp ult i64 %32, %33
  br i1 %34, label %36, label %35

35:                                               ; preds = %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %54

36:                                               ; preds = %30
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #5
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  %38 = call signext i8 @string_feeder_next(ptr noundef %37)
  store i8 %38, ptr %7, align 1, !tbaa !16
  %39 = load i8, ptr %7, align 1, !tbaa !16
  %40 = sext i8 %39 to i32
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !15
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds i8, ptr %41, i64 %43
  %45 = load i8, ptr %44, align 1, !tbaa !16
  %46 = sext i8 %45 to i32
  %47 = icmp eq i32 %40, %46
  br i1 %47, label %48, label %49

48:                                               ; preds = %36
  br label %50

49:                                               ; preds = %36
  call void @__assert_fail(ptr noundef @.str.14, ptr noundef @.str.1, i32 noundef 522, ptr noundef @__PRETTY_FUNCTION__.string_feeder_require) #4
  unreachable

50:                                               ; preds = %48
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #5
  br label %51

51:                                               ; preds = %50
  %52 = load i32, ptr %6, align 4, !tbaa !15
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %6, align 4, !tbaa !15
  br label %30, !llvm.loop !17

54:                                               ; preds = %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind willreturn memory(read) "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 = { 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 #4 = { noreturn nounwind }
attributes #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(read) }

!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 16}
!10 = !{!"string_feeder", !6, i64 0, !11, i64 8, !11, i64 16, !12, i64 24, !12, i64 28}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !11, i64 8}
!14 = !{!11, !11, i64 0}
!15 = !{!12, !12, i64 0}
!16 = !{!7, !7, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


; 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 [88 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.12 = external hidden unnamed_addr constant [19 x i8], align 1
@__PRETTY_FUNCTION__.string_feeder_require = external hidden unnamed_addr constant [60 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [12 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: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local signext i8 @string_feeder_next(ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local void @string_feeder_require(ptr noundef %0, ptr noundef readonly %1) local_unnamed_addr #2 {
  %.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.11, ptr noundef nonnull @.str.1, i32 noundef 514, ptr noundef nonnull @__PRETTY_FUNCTION__.string_feeder_require) #3
  unreachable

4:                                                ; preds = %2
  %.not14 = icmp eq ptr %1, null
  br i1 %.not14, label %5, label %6

5:                                                ; preds = %4
  tail call void @__assert_fail(ptr noundef nonnull @.str.5, ptr noundef nonnull @.str.1, i32 noundef 515, ptr noundef nonnull @__PRETTY_FUNCTION__.string_feeder_require) #3
  unreachable

6:                                                ; preds = %4
  %7 = getelementptr inbounds i8, ptr %0, i64 16
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %0, i64 8
  %10 = load i64, ptr %9, align 8, !tbaa !12
  %.not15 = icmp ugt i64 %8, %10
  br i1 %.not15, label %11, label %12

11:                                               ; preds = %6
  tail call void @__assert_fail(ptr noundef nonnull @.str.12, ptr noundef nonnull @.str.1, i32 noundef 516, ptr noundef nonnull @__PRETTY_FUNCTION__.string_feeder_require) #3
  unreachable

12:                                               ; preds = %6
  %13 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #4
  %.not17 = icmp eq i64 %13, 0
  br i1 %.not17, label %._crit_edge, label %.lr.ph

14:                                               ; preds = %.lr.ph
  %indvars.iv.next = add nuw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %13
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %14, %12
  ret void

.lr.ph:                                           ; preds = %12, %14
  %indvars.iv = phi i64 [ %indvars.iv.next, %14 ], [ 0, %12 ]
  %15 = tail call signext i8 @string_feeder_next(ptr noundef nonnull %0)
  %16 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %17 = load i8, ptr %16, align 1, !tbaa !15
  %18 = icmp eq i8 %15, %17
  br i1 %18, label %14, label %19

19:                                               ; preds = %.lr.ph
  tail call void @__assert_fail(ptr noundef nonnull @.str.14, ptr noundef nonnull @.str.1, i32 noundef 522, ptr noundef nonnull @__PRETTY_FUNCTION__.string_feeder_require) #3
  unreachable
}

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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 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 #3 = { noreturn nounwind }
attributes #4 = { nounwind willreturn memory(read) }

!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, !10, i64 16}
!6 = !{!"string_feeder", !7, i64 0, !10, i64 8, !10, i64 16, !11, i64 24, !11, i64 28}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!6, !10, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!8, !8, i64 0}


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