; LLVM IR from JamisHoo/Cryptographic-Algorithms :: src/des_ecb.ll (Z7des_ecbPKvmS0_Pv)

; 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.std::array" = type { [16 x %"struct.std::array.0"] }
%"struct.std::array.0" = type { [6 x i8] }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z15generateSubkeysPKh(ptr dead_on_unwind noalias writable sret(%"struct.std::array") align 1, ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17des_ecb_iterationPKhRKSt5arrayIS1_IhLm6EELm16EEPh(ptr noundef, ptr noundef nonnull align 1 dereferenceable(96), ptr noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7des_ecbPKvmS0_Pv(ptr noundef %0, i64 noundef %1, ptr noundef %2, ptr noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca %"struct.std::array", align 1
  %13 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %14, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %15, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %16 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %16, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 96, ptr %12) #2
  %17 = load ptr, ptr %10, align 8, !tbaa !5
  call void @_Z15generateSubkeysPKh(ptr dead_on_unwind writable sret(%"struct.std::array") align 1 %12, ptr noundef %17)
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #2
  store i64 0, ptr %13, align 8, !tbaa !9
  br label %18

18:                                               ; preds = %33, %4
  %19 = load i64, ptr %13, align 8, !tbaa !9
  %20 = load i64, ptr %6, align 8, !tbaa !9
  %21 = udiv i64 %20, 8
  %22 = icmp ult i64 %19, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #2
  br label %36

24:                                               ; preds = %18
  %25 = load ptr, ptr %9, align 8, !tbaa !5
  %26 = load i64, ptr %13, align 8, !tbaa !9
  %27 = mul i64 8, %26
  %28 = getelementptr inbounds i8, ptr %25, i64 %27
  %29 = load ptr, ptr %11, align 8, !tbaa !5
  %30 = load i64, ptr %13, align 8, !tbaa !9
  %31 = mul i64 8, %30
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  call void @_Z17des_ecb_iterationPKhRKSt5arrayIS1_IhLm6EELm16EEPh(ptr noundef %28, ptr noundef nonnull align 1 dereferenceable(96) %12, ptr noundef %32)
  br label %33

33:                                               ; preds = %24
  %34 = load i64, ptr %13, align 8, !tbaa !9
  %35 = add i64 %34, 1
  store i64 %35, ptr %13, align 8, !tbaa !9
  br label %18, !llvm.loop !11

36:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 96, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret void
}

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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"

%"struct.std::array" = type { [16 x %"struct.std::array.0"] }
%"struct.std::array.0" = type { [6 x i8] }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z15generateSubkeysPKh(ptr dead_on_unwind noalias writable sret(%"struct.std::array") align 1, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17des_ecb_iterationPKhRKSt5arrayIS1_IhLm6EELm16EEPh(ptr noundef, ptr noundef nonnull align 1 dereferenceable(96), ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7des_ecbPKvmS0_Pv(ptr noundef %0, i64 noundef %1, ptr noundef %2, ptr noundef %3) local_unnamed_addr #0 {
  %5 = alloca %"struct.std::array", align 1
  call void @llvm.lifetime.start.p0(i64 96, ptr nonnull %5) #2
  call void @_Z15generateSubkeysPKh(ptr dead_on_unwind nonnull writable sret(%"struct.std::array") align 1 %5, ptr noundef %2)
  %6 = lshr i64 %1, 3
  %.not = icmp ult i64 %1, 8
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %4
  call void @llvm.lifetime.end.p0(i64 96, ptr nonnull %5) #2
  ret void

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.010 = phi i64 [ %10, %.lr.ph ], [ 0, %4 ]
  %7 = shl nuw i64 %.010, 3
  %8 = getelementptr inbounds i8, ptr %0, i64 %7
  %9 = getelementptr inbounds i8, ptr %3, i64 %7
  call void @_Z17des_ecb_iterationPKhRKSt5arrayIS1_IhLm6EELm16EEPh(ptr noundef %8, ptr noundef nonnull align 1 dereferenceable(96) %5, ptr noundef %9)
  %10 = add nuw nsw i64 %.010, 1
  %exitcond.not = icmp eq i64 %10, %6
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5
}

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass