; LLVM IR from rweather/lightweight-crypto :: src/combined (subterranean)

; 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.subterranean_state_t = type { [9 x i32] }

; Function Attrs: nounwind uwtable
define dso_local void @subterranean_hash_update(ptr noundef %0, ptr noundef %1, i64 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %8, ptr %7, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %29, %3
  %10 = load i64, ptr %6, align 8, !tbaa !9
  %11 = icmp ugt i64 %10, 0
  br i1 %11, label %12, label %32

12:                                               ; preds = %9
  br label %13

13:                                               ; preds = %12
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  call void @subterranean_round(ptr noundef %14)
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i32 1
  store ptr %17, ptr %5, align 8, !tbaa !5
  %18 = load i8, ptr %16, align 1, !tbaa !11
  call void @subterranean_absorb_1(ptr noundef %15, i8 noundef zeroext %18)
  br label %19

19:                                               ; preds = %13
  br label %20

20:                                               ; preds = %19
  br label %21

21:                                               ; preds = %20
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  call void @subterranean_round(ptr noundef %22)
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.subterranean_state_t, ptr %23, i32 0, i32 0
  %25 = getelementptr inbounds [9 x i32], ptr %24, i64 0, i64 0
  %26 = load i32, ptr %25, align 4, !tbaa !12
  %27 = xor i32 %26, 2
  store i32 %27, ptr %25, align 4, !tbaa !12
  br label %28

28:                                               ; preds = %21
  br label %29

29:                                               ; preds = %28
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = add i64 %30, -1
  store i64 %31, ptr %6, align 8, !tbaa !9
  br label %9, !llvm.loop !14

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

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

declare void @subterranean_round(ptr noundef) #2

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

declare void @subterranean_absorb_1(ptr noundef, i8 noundef zeroext) #2

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 #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 = !{!"long long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 @subterranean_hash_update(ptr noundef %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not8 = icmp eq i64 %2, 0
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.010 = phi ptr [ %4, %.lr.ph ], [ %1, %3 ]
  %.079 = phi i64 [ %8, %.lr.ph ], [ %2, %3 ]
  tail call void @subterranean_round(ptr noundef %0) #2
  %4 = getelementptr inbounds i8, ptr %.010, i64 1
  %5 = load i8, ptr %.010, align 1, !tbaa !5
  tail call void @subterranean_absorb_1(ptr noundef %0, i8 noundef zeroext %5) #2
  tail call void @subterranean_round(ptr noundef %0) #2
  %6 = load i32, ptr %0, align 4, !tbaa !8
  %7 = xor i32 %6, 2
  store i32 %7, ptr %0, align 4, !tbaa !8
  %8 = add i64 %.079, -1
  %.not = icmp eq i64 %8, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

declare void @subterranean_round(ptr noundef) local_unnamed_addr #1

declare void @subterranean_absorb_1(ptr noundef, i8 noundef zeroext) 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 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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