; LLVM IR from number571/c-crypto-lib :: crypto/cipher (xor_wordkey)

; 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 signext i8 @xor_wordkey(ptr noundef %0, ptr noundef %1, i64 noundef %2, ptr noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = call i64 @strlen(ptr noundef %11) #4
  store i64 %12, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  store i64 0, ptr %10, align 8, !tbaa !9
  br label %13

13:                                               ; preds = %35, %4
  %14 = load i64, ptr %10, align 8, !tbaa !9
  %15 = load i64, ptr %7, align 8, !tbaa !9
  %16 = icmp ult i64 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %38

18:                                               ; preds = %13
  %19 = load ptr, ptr %8, align 8, !tbaa !5
  %20 = load i64, ptr %10, align 8, !tbaa !9
  %21 = getelementptr inbounds i16, ptr %19, i64 %20
  %22 = load i16, ptr %21, align 2, !tbaa !11
  %23 = sext i16 %22 to i32
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = load i64, ptr %10, align 8, !tbaa !9
  %26 = load i64, ptr %9, align 8, !tbaa !9
  %27 = urem i64 %25, %26
  %28 = getelementptr inbounds i8, ptr %24, i64 %27
  %29 = load i8, ptr %28, align 1, !tbaa !13
  %30 = zext i8 %29 to i32
  %31 = xor i32 %23, %30
  %32 = trunc i32 %31 to i16
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds i16, ptr %33, i32 1
  store ptr %34, ptr %5, align 8, !tbaa !5
  store i16 %32, ptr %33, align 2, !tbaa !11
  br label %35

35:                                               ; preds = %18
  %36 = load i64, ptr %10, align 8, !tbaa !9
  %37 = add i64 %36, 1
  store i64 %37, ptr %10, align 8, !tbaa !9
  br label %13, !llvm.loop !14

38:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret i8 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #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) #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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"short", !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: nofree nounwind memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local noundef signext i8 @xor_wordkey(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1, i64 noundef %2, ptr nocapture noundef readonly %3) local_unnamed_addr #0 {
  %5 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #2
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %xtraiter = and i64 %2, 1
  %6 = icmp eq i64 %2, 1
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %2, -2
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.011.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %31, %.lr.ph ]
  %.0910.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %30, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa
  %7 = getelementptr inbounds i16, ptr %3, i64 %.011.unr
  %8 = load i16, ptr %7, align 2, !tbaa !5
  %9 = urem i64 %.011.unr, %5
  %10 = getelementptr inbounds i8, ptr %1, i64 %9
  %11 = load i8, ptr %10, align 1, !tbaa !9
  %12 = zext i8 %11 to i16
  %13 = xor i16 %8, %12
  store i16 %13, ptr %.0910.unr, align 2, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa, %4
  ret i8 0

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.011 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %31, %.lr.ph ]
  %.0910 = phi ptr [ %0, %.lr.ph.preheader.new ], [ %30, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.1, %.lr.ph ]
  %14 = getelementptr inbounds i16, ptr %3, i64 %.011
  %15 = load i16, ptr %14, align 2, !tbaa !5
  %16 = urem i64 %.011, %5
  %17 = getelementptr inbounds i8, ptr %1, i64 %16
  %18 = load i8, ptr %17, align 1, !tbaa !9
  %19 = zext i8 %18 to i16
  %20 = xor i16 %15, %19
  %21 = getelementptr inbounds i8, ptr %.0910, i64 2
  store i16 %20, ptr %.0910, align 2, !tbaa !5
  %22 = or disjoint i64 %.011, 1
  %23 = getelementptr inbounds i16, ptr %3, i64 %22
  %24 = load i16, ptr %23, align 2, !tbaa !5
  %25 = urem i64 %22, %5
  %26 = getelementptr inbounds i8, ptr %1, i64 %25
  %27 = load i8, ptr %26, align 1, !tbaa !9
  %28 = zext i8 %27 to i16
  %29 = xor i16 %24, %28
  %30 = getelementptr inbounds i8, ptr %.0910, i64 4
  store i16 %29, ptr %21, align 2, !tbaa !5
  %31 = add nuw i64 %.011, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !10
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(write, argmem: readwrite, 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, !6, i64 0}
!6 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass