; LLVM IR from alibaba/euler :: euler/common/slice.ll (ZNK5euler5Slice4findEcm)

; 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"

%"class.euler::Slice" = type { ptr, i64 }

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZNK5euler5Slice4findEcm(ptr noundef nonnull align 8 dereferenceable(16) %0, i8 noundef signext %1, i64 noundef %2) #1 align 2 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i8, align 1
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i8 %1, ptr %6, align 1, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !10
  %9 = load ptr, ptr %5, align 8
  %10 = load i64, ptr %7, align 8, !tbaa !10
  %11 = getelementptr inbounds %"class.euler::Slice", ptr %9, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !12
  %13 = icmp uge i64 %10, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %3
  store i64 -1, ptr %4, align 8
  br label %39

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %16 = getelementptr inbounds %"class.euler::Slice", ptr %9, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !14
  %18 = load i64, ptr %7, align 8, !tbaa !10
  %19 = getelementptr inbounds i8, ptr %17, i64 %18
  %20 = load i8, ptr %6, align 1, !tbaa !9
  %21 = sext i8 %20 to i32
  %22 = getelementptr inbounds %"class.euler::Slice", ptr %9, i32 0, i32 1
  %23 = load i64, ptr %22, align 8, !tbaa !12
  %24 = load i64, ptr %7, align 8, !tbaa !10
  %25 = sub i64 %23, %24
  %26 = call noundef ptr @memchr(ptr noundef %19, i32 noundef %21, i64 noundef %25) #4
  store ptr %26, ptr %8, align 8, !tbaa !5
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = icmp ne ptr %27, null
  br i1 %28, label %29, label %36

29:                                               ; preds = %15
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = getelementptr inbounds %"class.euler::Slice", ptr %9, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8, !tbaa !14
  %33 = ptrtoint ptr %30 to i64
  %34 = ptrtoint ptr %32 to i64
  %35 = sub i64 %33, %34
  br label %37

36:                                               ; preds = %15
  br label %37

37:                                               ; preds = %36, %29
  %38 = phi i64 [ %35, %29 ], [ -1, %36 ]
  store i64 %38, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %39

39:                                               ; preds = %37, %14
  %40 = load i64, ptr %4, align 8
  ret i64 %40
}

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 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 }
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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !11, i64 8}
!13 = !{!"_ZTSN5euler5SliceE", !6, i64 0, !11, i64 8}
!14 = !{!13, !6, 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 noundef i64 @_ZNK5euler5Slice4findEcm(ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %0, i8 noundef signext %1, i64 noundef %2) local_unnamed_addr #0 align 2 {
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %.not = icmp ugt i64 %5, %2
  br i1 %.not, label %6, label %16

6:                                                ; preds = %3
  %7 = load ptr, ptr %0, align 8, !tbaa !11
  %8 = getelementptr inbounds i8, ptr %7, i64 %2
  %9 = sext i8 %1 to i32
  %10 = sub i64 %5, %2
  %11 = tail call noundef ptr @memchr(ptr noundef %8, i32 noundef %9, i64 noundef %10) #2
  %.not10 = icmp eq ptr %11, null
  %12 = ptrtoint ptr %11 to i64
  %13 = ptrtoint ptr %7 to i64
  %14 = sub i64 %12, %13
  %15 = select i1 %.not10, i64 -1, i64 %14
  br label %16

16:                                               ; preds = %3, %6
  %.0 = phi i64 [ %15, %6 ], [ -1, %3 ]
  ret i64 %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare noundef ptr @memchr(ptr noundef, i32 noundef, i64 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, !10, i64 8}
!6 = !{!"_ZTSN5euler5SliceE", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 0}


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