; LLVM IR from didi/AoE :: iOS/AoE/library/Crypto/Classes/decrypt (aocaes)

; 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.AES_ctx = type { [176 x i8], [16 x i8] }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare hidden void @aoe_Cipher(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @aoe_AES_CBC_encrypt_buffer(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.AES_ctx, ptr %9, i32 0, i32 1
  %11 = getelementptr inbounds [16 x i8], ptr %10, i64 0, i64 0
  store ptr %11, ptr %8, align 8, !tbaa !5
  store i64 0, ptr %7, align 8, !tbaa !11
  br label %12

12:                                               ; preds = %27, %3
  %13 = load i64, ptr %7, align 8, !tbaa !11
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = zext i32 %14 to i64
  %16 = icmp ult i64 %13, %15
  br i1 %16, label %17, label %30

17:                                               ; preds = %12
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load ptr, ptr %8, align 8, !tbaa !5
  call void @aoe_XorWithIv(ptr noundef %18, ptr noundef %19)
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.AES_ctx, ptr %21, i32 0, i32 0
  %23 = getelementptr inbounds [176 x i8], ptr %22, i64 0, i64 0
  call void @aoe_Cipher(ptr noundef %20, ptr noundef %23)
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %24, ptr %8, align 8, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i64 16
  store ptr %26, ptr %5, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %17
  %28 = load i64, ptr %7, align 8, !tbaa !11
  %29 = add i64 %28, 16
  store i64 %29, ptr %7, align 8, !tbaa !11
  br label %12, !llvm.loop !13

30:                                               ; preds = %12
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.AES_ctx, ptr %31, i32 0, i32 1
  %33 = getelementptr inbounds [16 x i8], ptr %32, i64 0, i64 0
  %34 = load ptr, ptr %8, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %33, ptr align 1 %34, i64 16, i1 false)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret void
}

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

; Function Attrs: nounwind uwtable
declare hidden void @aoe_XorWithIv(ptr noundef, ptr noundef) #1

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

attributes #0 = { nocallback nofree 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 nosync nounwind willreturn memory(argmem: readwrite) }
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}
!13 = distinct !{!13, !14}
!14 = !{!"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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare hidden void @aoe_Cipher(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @aoe_AES_CBC_encrypt_buffer(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = getelementptr inbounds i8, ptr %0, i64 176
  %5 = zext i32 %2 to i64
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.015 = phi ptr [ %.01213, %.lr.ph ], [ %4, %3 ]
  %.01114 = phi i64 [ %7, %.lr.ph ], [ 0, %3 ]
  %.01213 = phi ptr [ %6, %.lr.ph ], [ %1, %3 ]
  tail call void @aoe_XorWithIv(ptr noundef %.01213, ptr noundef %.015)
  tail call void @aoe_Cipher(ptr noundef %.01213, ptr noundef %0)
  %6 = getelementptr inbounds i8, ptr %.01213, i64 16
  %7 = add nuw nsw i64 %.01114, 16
  %8 = icmp ult i64 %7, %5
  br i1 %8, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.0.lcssa = phi ptr [ %4, %3 ], [ %.01213, %.lr.ph ]
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(16) %4, ptr noundef nonnull align 1 dereferenceable(16) %.0.lcssa, i64 16, i1 false)
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden void @aoe_XorWithIv(ptr noundef, ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nocallback nofree 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass