; LLVM IR from Water-Melon/Melon :: src (mln_string)

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

; Function Attrs: nounwind uwtable
define dso_local ptr @mln_string_strstr(ptr noundef nonnull %0, ptr noundef nonnull %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  %8 = icmp eq ptr %6, %7
  br i1 %8, label %17, label %9

9:                                                ; preds = %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.mln_string_t, ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !9
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.mln_string_t, ptr %13, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = icmp eq ptr %12, %15
  br i1 %16, label %17, label %21

17:                                               ; preds = %9, %2
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.mln_string_t, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !9
  store ptr %20, ptr %3, align 8
  br label %29

21:                                               ; preds = %9
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.mln_string_t, ptr %22, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !9
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.mln_string_t, ptr %25, i32 0, i32 0
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  %28 = call ptr @strstr(ptr noundef %24, ptr noundef %27) #2
  store ptr %28, ptr %3, align 8
  br label %29

29:                                               ; preds = %21, %17
  %30 = load ptr, ptr %3, align 8
  ret ptr %30
}

; Function Attrs: nounwind willreturn memory(read)
declare ptr @strstr(ptr noundef, ptr noundef) #1

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 = { 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 #2 = { 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, !6, i64 0}
!10 = !{!"", !6, i64 0, !11, i64 8, !11, i64 16, !11, i64 16, !11, i64 16}
!11 = !{!"long", !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: mustprogress nofree nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @mln_string_strstr(ptr noundef nonnull readonly %0, ptr noundef nonnull readonly %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, %1
  %.pre = load ptr, ptr %0, align 8, !tbaa !5
  br i1 %3, label %9, label %4

4:                                                ; preds = %2
  %5 = load ptr, ptr %1, align 8, !tbaa !5
  %6 = icmp eq ptr %.pre, %5
  br i1 %6, label %9, label %7

7:                                                ; preds = %4
  %8 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) %.pre, ptr noundef nonnull dereferenceable(1) %5) #2
  br label %9

9:                                                ; preds = %2, %4, %7
  %.0 = phi ptr [ %8, %7 ], [ %.pre, %4 ], [ %.pre, %2 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare ptr @strstr(ptr noundef, ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind willreturn memory(read, inaccessiblemem: none) 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 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 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 0}
!6 = !{!"", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 16, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}


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