; LLVM IR from kcchu/rust-tweetnacl :: tweetnacl (crypto_secretbox_xsalsa20poly1305_tweet_open)

; 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: 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: nounwind uwtable
declare dso_local i32 @crypto_stream_xsalsa20_tweet(ptr noundef, i64 noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @crypto_stream_xsalsa20_tweet_xor(ptr noundef, ptr noundef, i64 noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @crypto_onetimeauth_poly1305_tweet_verify(ptr noundef, ptr noundef, i64 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @crypto_secretbox_xsalsa20poly1305_tweet_open(ptr noundef %0, ptr noundef %1, i64 noundef %2, ptr noundef %3, ptr noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  %13 = alloca [32 x i8], align 16
  %14 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store i64 %2, ptr %9, align 8, !tbaa !9
  store ptr %3, ptr %10, align 8, !tbaa !5
  store ptr %4, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  call void @llvm.lifetime.start.p0(i64 32, ptr %13) #2
  %15 = load i64, ptr %9, align 8, !tbaa !9
  %16 = icmp ult i64 %15, 32
  br i1 %16, label %17, label %18

17:                                               ; preds = %5
  store i32 -1, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %52

18:                                               ; preds = %5
  %19 = getelementptr inbounds [32 x i8], ptr %13, i64 0, i64 0
  %20 = load ptr, ptr %10, align 8, !tbaa !5
  %21 = load ptr, ptr %11, align 8, !tbaa !5
  %22 = call i32 @crypto_stream_xsalsa20_tweet(ptr noundef %19, i64 noundef 32, ptr noundef %20, ptr noundef %21)
  %23 = load ptr, ptr %8, align 8, !tbaa !5
  %24 = getelementptr inbounds i8, ptr %23, i64 16
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i64 32
  %27 = load i64, ptr %9, align 8, !tbaa !9
  %28 = sub i64 %27, 32
  %29 = getelementptr inbounds [32 x i8], ptr %13, i64 0, i64 0
  %30 = call i32 @crypto_onetimeauth_poly1305_tweet_verify(ptr noundef %24, ptr noundef %26, i64 noundef %28, ptr noundef %29)
  %31 = icmp ne i32 %30, 0
  br i1 %31, label %32, label %33

32:                                               ; preds = %18
  store i32 -1, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %52

33:                                               ; preds = %18
  %34 = load ptr, ptr %7, align 8, !tbaa !5
  %35 = load ptr, ptr %8, align 8, !tbaa !5
  %36 = load i64, ptr %9, align 8, !tbaa !9
  %37 = load ptr, ptr %10, align 8, !tbaa !5
  %38 = load ptr, ptr %11, align 8, !tbaa !5
  %39 = call i32 @crypto_stream_xsalsa20_tweet_xor(ptr noundef %34, ptr noundef %35, i64 noundef %36, ptr noundef %37, ptr noundef %38)
  store i32 0, ptr %12, align 4, !tbaa !11
  br label %40

40:                                               ; preds = %48, %33
  %41 = load i32, ptr %12, align 4, !tbaa !11
  %42 = icmp slt i32 %41, 32
  br i1 %42, label %43, label %51

43:                                               ; preds = %40
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = load i32, ptr %12, align 4, !tbaa !11
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds i8, ptr %44, i64 %46
  store i8 0, ptr %47, align 1, !tbaa !13
  br label %48

48:                                               ; preds = %43
  %49 = load i32, ptr %12, align 4, !tbaa !11
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %12, align 4, !tbaa !11
  br label %40, !llvm.loop !14

51:                                               ; preds = %40
  store i32 0, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %52

52:                                               ; preds = %51, %32, %17
  call void @llvm.lifetime.end.p0(i64 32, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  %53 = load i32, ptr %6, align 4
  ret i32 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 }

!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 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !7, i64 0}
!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"

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

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @crypto_stream_xsalsa20_tweet(ptr noundef, i64 noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @crypto_stream_xsalsa20_tweet_xor(ptr noundef, ptr noundef, i64 noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @crypto_onetimeauth_poly1305_tweet_verify(ptr noundef, ptr noundef, i64 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @crypto_secretbox_xsalsa20poly1305_tweet_open(ptr noundef %0, ptr noundef %1, i64 noundef %2, ptr noundef %3, ptr noundef %4) local_unnamed_addr #1 {
  %6 = alloca [32 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %6) #3
  %7 = icmp ult i64 %2, 32
  br i1 %7, label %.loopexit, label %8

8:                                                ; preds = %5
  %9 = call i32 @crypto_stream_xsalsa20_tweet(ptr noundef nonnull %6, i64 noundef 32, ptr noundef %3, ptr noundef %4)
  %10 = getelementptr inbounds i8, ptr %1, i64 16
  %11 = getelementptr inbounds i8, ptr %1, i64 32
  %12 = add i64 %2, -32
  %13 = call i32 @crypto_onetimeauth_poly1305_tweet_verify(ptr noundef nonnull %10, ptr noundef nonnull %11, i64 noundef %12, ptr noundef nonnull %6)
  %.not = icmp eq i32 %13, 0
  br i1 %.not, label %.loopexit.loopexit, label %.loopexit

.loopexit.loopexit:                               ; preds = %8
  %14 = call i32 @crypto_stream_xsalsa20_tweet_xor(ptr noundef %0, ptr noundef %1, i64 noundef %2, ptr noundef %3, ptr noundef %4)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 1 dereferenceable(32) %0, i8 0, i64 32, i1 false), !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %.loopexit.loopexit, %8, %5
  %.015 = phi i32 [ -1, %5 ], [ -1, %8 ], [ 0, %.loopexit.loopexit ]
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #3
  ret i32 %.015
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,SROAPass,SimplifyCFGPass