; LLVM IR from a-earthperson/Android-NDK-FileCrypto-AES-CBC :: xz-5.2.2/src/common (tuklib_mbstr_fw)

; 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"

; Function Attrs: nounwind uwtable
define dso_local i32 @tuklib_mbstr_fw(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call i64 @tuklib_mbstr_width(ptr noundef %9, ptr noundef %6)
  store i64 %10, ptr %7, align 8, !tbaa !11
  %11 = load i64, ptr %7, align 8, !tbaa !11
  %12 = icmp eq i64 %11, -1
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %35

14:                                               ; preds = %2
  %15 = load i64, ptr %7, align 8, !tbaa !11
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = icmp ugt i64 %15, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %14
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %35

20:                                               ; preds = %14
  %21 = load i64, ptr %7, align 8, !tbaa !11
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = icmp ult i64 %21, %23
  br i1 %24, label %25, label %32

25:                                               ; preds = %20
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = load i64, ptr %7, align 8, !tbaa !11
  %29 = sub i64 %27, %28
  %30 = load i64, ptr %6, align 8, !tbaa !11
  %31 = add i64 %30, %29
  store i64 %31, ptr %6, align 8, !tbaa !11
  br label %32

32:                                               ; preds = %25, %20
  %33 = load i64, ptr %6, align 8, !tbaa !11
  %34 = trunc i64 %33 to i32
  store i32 %34, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %35

35:                                               ; preds = %32, %19, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %36 = load i32, ptr %3, align 4
  ret i32 %36
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i64 @tuklib_mbstr_width(ptr noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 }

!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, !12, i64 0}
!12 = !{!"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: nounwind uwtable
define dso_local i32 @tuklib_mbstr_fw(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %4 = call i64 @tuklib_mbstr_width(ptr noundef %0, ptr noundef nonnull %3) #4
  %5 = icmp eq i64 %4, -1
  br i1 %5, label %13, label %6

6:                                                ; preds = %2
  %7 = sext i32 %1 to i64
  %8 = icmp ugt i64 %4, %7
  br i1 %8, label %13, label %9

9:                                                ; preds = %6
  %.pre = load i64, ptr %3, align 8, !tbaa !5
  %10 = call i64 @llvm.usub.sat.i64(i64 %7, i64 %4)
  %11 = add i64 %.pre, %10
  %12 = trunc i64 %11 to i32
  br label %13

13:                                               ; preds = %6, %2, %9
  %.0 = phi i32 [ %12, %9 ], [ -1, %2 ], [ 0, %6 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i64 @tuklib_mbstr_width(ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.usub.sat.i64(i64, i64) #3

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass