; LLVM IR from stamparm/cryptospecs :: symmetrical/sources (gost)

; 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
declare dso_local void @gostcrypt(ptr noundef, ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @gostcfbencrypt(ptr noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef %3, ptr noundef %4) #0 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, 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 i32 %2, ptr %8, align 4, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !5
  store ptr %4, ptr %10, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %15, %5
  %12 = load i32, ptr %8, align 4, !tbaa !9
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr %8, align 4, !tbaa !9
  %14 = icmp ne i32 %12, 0
  br i1 %14, label %15, label %37

15:                                               ; preds = %11
  %16 = load ptr, ptr %9, align 8, !tbaa !5
  %17 = load ptr, ptr %9, align 8, !tbaa !5
  %18 = load ptr, ptr %10, align 8, !tbaa !5
  call void @gostcrypt(ptr noundef %16, ptr noundef %17, ptr noundef %18)
  %19 = load ptr, ptr %9, align 8, !tbaa !5
  %20 = getelementptr inbounds i64, ptr %19, i64 0
  %21 = load i64, ptr %20, align 8, !tbaa !11
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = getelementptr inbounds i64, ptr %22, i32 1
  store ptr %23, ptr %7, align 8, !tbaa !5
  %24 = load i64, ptr %22, align 8, !tbaa !11
  %25 = xor i64 %24, %21
  store i64 %25, ptr %22, align 8, !tbaa !11
  %26 = load ptr, ptr %9, align 8, !tbaa !5
  %27 = getelementptr inbounds i64, ptr %26, i64 0
  store i64 %25, ptr %27, align 8, !tbaa !11
  %28 = load ptr, ptr %9, align 8, !tbaa !5
  %29 = getelementptr inbounds i64, ptr %28, i64 1
  %30 = load i64, ptr %29, align 8, !tbaa !11
  %31 = load ptr, ptr %7, align 8, !tbaa !5
  %32 = getelementptr inbounds i64, ptr %31, i32 1
  store ptr %32, ptr %7, align 8, !tbaa !5
  %33 = load i64, ptr %31, align 8, !tbaa !11
  %34 = xor i64 %33, %30
  store i64 %34, ptr %31, align 8, !tbaa !11
  %35 = load ptr, ptr %9, align 8, !tbaa !5
  %36 = getelementptr inbounds i64, ptr %35, i64 1
  store i64 %34, ptr %36, align 8, !tbaa !11
  br label %11, !llvm.loop !13

37:                                               ; preds = %11
  ret void
}

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" }

!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: nounwind uwtable
declare dso_local void @gostcrypt(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @gostcfbencrypt(ptr nocapture noundef readnone %0, ptr nocapture noundef %1, i32 noundef %2, ptr noundef %3, ptr noundef %4) local_unnamed_addr #0 {
  %.not10 = icmp eq i32 %2, 0
  br i1 %.not10, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %5
  %6 = getelementptr inbounds i8, ptr %3, i64 8
  br label %7

7:                                                ; preds = %.lr.ph, %7
  %.012 = phi ptr [ %1, %.lr.ph ], [ %14, %7 ]
  %.0911 = phi i32 [ %2, %.lr.ph ], [ %8, %7 ]
  %8 = add nsw i32 %.0911, -1
  tail call void @gostcrypt(ptr noundef %3, ptr noundef %3, ptr noundef %4)
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %.012, i64 8
  %11 = load i64, ptr %.012, align 8, !tbaa !5
  %12 = xor i64 %11, %9
  store i64 %12, ptr %.012, align 8, !tbaa !5
  store i64 %12, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %.012, i64 16
  %15 = load i64, ptr %10, align 8, !tbaa !5
  %16 = xor i64 %15, %13
  store i64 %16, ptr %10, align 8, !tbaa !5
  store i64 %16, ptr %6, align 8, !tbaa !5
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %._crit_edge, label %7, !llvm.loop !9

._crit_edge:                                      ; preds = %7, %5
  ret void
}

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" }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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