; LLVM IR from square/subzero :: core/external-crypto/modes/ltc (ltc_ctr)

; 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.ctr_ctx = type { [1 x %struct.aes_crypt_ctx], [16 x i8], [16 x i8], i32, i32, [8 x i8] }
%struct.aes_crypt_ctx = type { [60 x i32], %union.aes_inf, [12 x i8] }
%union.aes_inf = type { i32 }

; 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
define dso_local i32 @ctr_getiv(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  %8 = load ptr, ptr %6, align 8, !tbaa !5
  %9 = load i64, ptr %8, align 8, !tbaa !9
  %10 = icmp ugt i64 16, %9
  br i1 %10, label %11, label %13

11:                                               ; preds = %3
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  store i64 16, ptr %12, align 8, !tbaa !9
  store i32 1, ptr %4, align 4
  br label %19

13:                                               ; preds = %3
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.ctr_ctx, ptr %15, i32 0, i32 1
  %17 = getelementptr inbounds [16 x i8], ptr %16, i64 0, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %14, ptr align 16 %17, i64 16, i1 false)
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  store i64 16, ptr %18, align 8, !tbaa !9
  store i32 0, ptr %4, align 4
  br label %19

19:                                               ; preds = %13, %11
  %20 = load i32, ptr %4, align 4
  ret i32 %20
}

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" }

!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}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local range(i32 0, 2) i32 @ctr_getiv(ptr nocapture noundef writeonly %0, ptr nocapture noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #1 {
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = icmp ult i64 %4, 16
  br i1 %5, label %8, label %6

6:                                                ; preds = %3
  %7 = getelementptr inbounds i8, ptr %2, i64 256
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(16) %0, ptr noundef nonnull align 16 dereferenceable(16) %7, i64 16, i1 false)
  br label %8

8:                                                ; preds = %3, %6
  %.0 = phi i32 [ 0, %6 ], [ 1, %3 ]
  store i64 16, ptr %1, align 8, !tbaa !5
  ret i32 %.0
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass