; LLVM IR from guanzhi/GmSSL :: src (aes_modes)

; 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 void @aes_cbc_decrypt(ptr noundef %0, ptr noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef %4) #0 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %15, %5
  %12 = load i64, ptr %9, align 8, !tbaa !9
  %13 = add i64 %12, -1
  store i64 %13, ptr %9, align 8, !tbaa !9
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %26

15:                                               ; preds = %11
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = load ptr, ptr %10, align 8, !tbaa !5
  call void @aes_decrypt(ptr noundef %16, ptr noundef %17, ptr noundef %18)
  %19 = load ptr, ptr %10, align 8, !tbaa !5
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  call void @memxor(ptr noundef %19, ptr noundef %20, i64 noundef 16)
  %21 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %21, ptr %7, align 8, !tbaa !5
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = getelementptr inbounds i8, ptr %22, i64 16
  store ptr %23, ptr %8, align 8, !tbaa !5
  %24 = load ptr, ptr %10, align 8, !tbaa !5
  %25 = getelementptr inbounds i8, ptr %24, i64 16
  store ptr %25, ptr %10, align 8, !tbaa !5
  br label %11, !llvm.loop !11

26:                                               ; preds = %11
  ret void
}

declare void @aes_decrypt(ptr noundef, ptr noundef, ptr noundef) #1

declare void @memxor(ptr noundef, ptr noundef, i64 noundef) #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 = { "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 = !{!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 = distinct !{!11, !12}
!12 = !{!"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: nounwind uwtable
define dso_local void @aes_cbc_decrypt(ptr noundef %0, ptr noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef %4) local_unnamed_addr #0 {
  %.not11 = icmp eq i64 %3, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %5, %.lr.ph
  %.015 = phi ptr [ %8, %.lr.ph ], [ %4, %5 ]
  %.0814 = phi i64 [ %6, %.lr.ph ], [ %3, %5 ]
  %.0913 = phi ptr [ %7, %.lr.ph ], [ %2, %5 ]
  %.01012 = phi ptr [ %.0913, %.lr.ph ], [ %1, %5 ]
  %6 = add i64 %.0814, -1
  tail call void @aes_decrypt(ptr noundef %0, ptr noundef %.0913, ptr noundef %.015) #2
  tail call void @memxor(ptr noundef %.015, ptr noundef %.01012, i64 noundef 16) #2
  %7 = getelementptr inbounds i8, ptr %.0913, i64 16
  %8 = getelementptr inbounds i8, ptr %.015, i64 16
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %5
  ret void
}

declare void @aes_decrypt(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

declare void @memxor(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #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 = { "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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass