; LLVM IR from theck01/offbrand_lib :: src/classes (obstring)

; 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.obstring_struct = type { ptr, ptr, i32 }

@.str.1 = external hidden unnamed_addr constant [77 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@__PRETTY_FUNCTION__.obstring_find_substring = external hidden unnamed_addr constant [64 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [10 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #1

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strncmp(ptr noundef, ptr noundef, i64 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local zeroext i8 @obstring_find_substring(ptr noundef %0, ptr noundef %1) #3 {
  %3 = alloca i8, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  br label %13

12:                                               ; preds = %2
  call void @__assert_fail(ptr noundef @.str.3, ptr noundef @.str.1, i32 noundef 159, ptr noundef @__PRETTY_FUNCTION__.obstring_find_substring) #5
  unreachable

13:                                               ; preds = %11
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = icmp ne ptr %14, null
  br i1 %15, label %16, label %17

16:                                               ; preds = %13
  br label %18

17:                                               ; preds = %13
  call void @__assert_fail(ptr noundef @.str.8, ptr noundef @.str.1, i32 noundef 160, ptr noundef @__PRETTY_FUNCTION__.obstring_find_substring) #5
  unreachable

18:                                               ; preds = %16
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = call i64 @strlen(ptr noundef %19) #6
  %21 = trunc i64 %20 to i32
  store i32 %21, ptr %6, align 4, !tbaa !9
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.obstring_struct, ptr %22, i32 0, i32 1
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  store ptr %24, ptr %7, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %47, %18
  %26 = load ptr, ptr %7, align 8, !tbaa !5
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.obstring_struct, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.obstring_struct, ptr %30, i32 0, i32 2
  %32 = load i32, ptr %31, align 8, !tbaa !13
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = sub i32 %32, %33
  %35 = zext i32 %34 to i64
  %36 = getelementptr inbounds i8, ptr %29, i64 %35
  %37 = icmp ule ptr %26, %36
  br i1 %37, label %38, label %50

38:                                               ; preds = %25
  %39 = load ptr, ptr %7, align 8, !tbaa !5
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = zext i32 %41 to i64
  %43 = call i32 @strncmp(ptr noundef %39, ptr noundef %40, i64 noundef %42) #6
  %44 = icmp eq i32 %43, 0
  br i1 %44, label %45, label %46

45:                                               ; preds = %38
  store i8 1, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %51

46:                                               ; preds = %38
  br label %47

47:                                               ; preds = %46
  %48 = load ptr, ptr %7, align 8, !tbaa !5
  %49 = getelementptr inbounds i8, ptr %48, i32 1
  store ptr %49, ptr %7, align 8, !tbaa !5
  br label %25, !llvm.loop !14

50:                                               ; preds = %25
  store i8 0, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %51

51:                                               ; preds = %50, %45
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %52 = load i8, ptr %3, align 1
  ret i8 %52
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { nounwind }
attributes #5 = { noreturn 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"obstring_struct", !6, i64 0, !6, i64 8, !10, i64 16}
!13 = !{!12, !10, i64 16}
!14 = distinct !{!14, !15}
!15 = !{!"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 [77 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@__PRETTY_FUNCTION__.obstring_find_substring = external hidden unnamed_addr constant [64 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [10 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: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strncmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local zeroext range(i8 0, 2) i8 @obstring_find_substring(ptr noundef readonly %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.3, ptr noundef nonnull @.str.1, i32 noundef 159, ptr noundef nonnull @__PRETTY_FUNCTION__.obstring_find_substring) #3
  unreachable

4:                                                ; preds = %2
  %.not15 = icmp eq ptr %1, null
  br i1 %.not15, label %5, label %.lr.ph.preheader

5:                                                ; preds = %4
  tail call void @__assert_fail(ptr noundef nonnull @.str.8, ptr noundef nonnull @.str.1, i32 noundef 160, ptr noundef nonnull @__PRETTY_FUNCTION__.obstring_find_substring) #3
  unreachable

.lr.ph.preheader:                                 ; preds = %4
  %6 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #4
  %7 = trunc i64 %6 to i32
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  %10 = and i64 %6, 4294967295
  %11 = getelementptr inbounds i8, ptr %0, i64 16
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = sub i32 %12, %7
  %14 = zext i32 %13 to i64
  %15 = getelementptr inbounds i8, ptr %9, i64 %14
  br label %.lr.ph

16:                                               ; preds = %.lr.ph
  %17 = getelementptr inbounds i8, ptr %.018, i64 1
  %.not16 = icmp ugt ptr %17, %15
  br i1 %.not16, label %._crit_edge, label %.lr.ph, !llvm.loop !12

.lr.ph:                                           ; preds = %.lr.ph.preheader, %16
  %.018 = phi ptr [ %17, %16 ], [ %9, %.lr.ph.preheader ]
  %18 = tail call i32 @strncmp(ptr noundef %.018, ptr noundef nonnull %1, i64 noundef %10) #4
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %._crit_edge, label %16

._crit_edge:                                      ; preds = %.lr.ph, %16
  %.012.ph = phi i8 [ 1, %.lr.ph ], [ 0, %16 ]
  ret i8 %.012.ph
}

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


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass