; 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_InvCipher(ptr noundef, ptr noundef) #1

; 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

; Function Attrs: nounwind uwtable
define dso_local void @aoe_AES_CBC_decrypt_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 [16 x i8], align 16
  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 16, ptr %8) #3
  store i64 0, ptr %7, align 8, !tbaa !11
  br label %9

9:                                                ; preds = %31, %3
  %10 = load i64, ptr %7, align 8, !tbaa !11
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = zext i32 %11 to i64
  %13 = icmp ult i64 %10, %12
  br i1 %13, label %14, label %34

14:                                               ; preds = %9
  %15 = getelementptr inbounds [16 x i8], ptr %8, i64 0, i64 0
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %15, ptr align 1 %16, i64 16, i1 false)
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.AES_ctx, ptr %18, i32 0, i32 0
  %20 = getelementptr inbounds [176 x i8], ptr %19, i64 0, i64 0
  call void @aoe_InvCipher(ptr noundef %17, ptr noundef %20)
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.AES_ctx, ptr %22, i32 0, i32 1
  %24 = getelementptr inbounds [16 x i8], ptr %23, i64 0, i64 0
  call void @aoe_XorWithIv(ptr noundef %21, ptr noundef %24)
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.AES_ctx, ptr %25, i32 0, i32 1
  %27 = getelementptr inbounds [16 x i8], ptr %26, i64 0, i64 0
  %28 = getelementptr inbounds [16 x i8], ptr %8, i64 0, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %27, ptr align 16 %28, i64 16, i1 false)
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds i8, ptr %29, i64 16
  store ptr %30, ptr %5, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %14
  %32 = load i64, ptr %7, align 8, !tbaa !11
  %33 = add i64 %32, 16
  store i64 %33, ptr %7, align 8, !tbaa !11
  br label %9, !llvm.loop !13

34:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 16, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret void
}

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_InvCipher(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress 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) local_unnamed_addr #1

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

; Function Attrs: nounwind uwtable
define dso_local void @aoe_AES_CBC_decrypt_buffer(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = alloca [16 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4)
  %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
  %6 = getelementptr inbounds i8, ptr %0, i64 176
  br label %7

7:                                                ; preds = %.lr.ph, %7
  %.011 = phi i64 [ 0, %.lr.ph ], [ %9, %7 ]
  %.0910 = phi ptr [ %1, %.lr.ph ], [ %8, %7 ]
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %4, ptr noundef nonnull align 1 dereferenceable(16) %.0910, i64 16, i1 false)
  tail call void @aoe_InvCipher(ptr noundef %.0910, ptr noundef %0)
  tail call void @aoe_XorWithIv(ptr noundef %.0910, ptr noundef nonnull %6)
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(16) %6, ptr noundef nonnull align 16 dereferenceable(16) %4, i64 16, i1 false)
  %8 = getelementptr inbounds i8, ptr %.0910, i64 16
  %9 = add nuw nsw i64 %.011, 16
  %10 = icmp ult i64 %9, %5
  br i1 %10, label %7, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %7, %3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %4)
  ret void
}

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" }
attributes #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }

!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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass