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

; 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"

@aead_chacha_state = external hidden global <{ i32, i32, i32, i32, [12 x i32] }>, align 16

; Function Attrs: nounwind uwtable
declare hidden void @aead_chacha_rekey() #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: nounwind uwtable
define dso_local void @aead_random_set_seed(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %50, %1
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = icmp slt i32 %5, 8
  br i1 %6, label %7, label %53

7:                                                ; preds = %4
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !9
  %10 = mul nsw i32 %9, 4
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds i8, ptr %8, i64 %11
  %13 = getelementptr inbounds i8, ptr %12, i64 3
  %14 = load i8, ptr %13, align 1, !tbaa !11
  %15 = zext i8 %14 to i32
  %16 = shl i32 %15, 24
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !9
  %19 = mul nsw i32 %18, 4
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i8, ptr %17, i64 %20
  %22 = getelementptr inbounds i8, ptr %21, i64 2
  %23 = load i8, ptr %22, align 1, !tbaa !11
  %24 = zext i8 %23 to i32
  %25 = shl i32 %24, 16
  %26 = or i32 %16, %25
  %27 = load ptr, ptr %2, align 8, !tbaa !5
  %28 = load i32, ptr %3, align 4, !tbaa !9
  %29 = mul nsw i32 %28, 4
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i8, ptr %27, i64 %30
  %32 = getelementptr inbounds i8, ptr %31, i64 1
  %33 = load i8, ptr %32, align 1, !tbaa !11
  %34 = zext i8 %33 to i32
  %35 = shl i32 %34, 8
  %36 = or i32 %26, %35
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !9
  %39 = mul nsw i32 %38, 4
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i8, ptr %37, i64 %40
  %42 = getelementptr inbounds i8, ptr %41, i64 0
  %43 = load i8, ptr %42, align 1, !tbaa !11
  %44 = zext i8 %43 to i32
  %45 = or i32 %36, %44
  %46 = load i32, ptr %3, align 4, !tbaa !9
  %47 = add nsw i32 %46, 4
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [16 x i32], ptr @aead_chacha_state, i64 0, i64 %48
  store i32 %45, ptr %49, align 4, !tbaa !9
  br label %50

50:                                               ; preds = %7
  %51 = load i32, ptr %3, align 4, !tbaa !9
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !12

53:                                               ; preds = %4
  call void @llvm.memset.p0.i64(ptr align 4 getelementptr inbounds (i32, ptr @aead_chacha_state, i64 12), i8 0, i64 16, i1 false)
  call void @aead_chacha_rekey()
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

@aead_chacha_state = external hidden local_unnamed_addr global <{ i32, i32, i32, i32, [12 x i32] }>, align 16

; Function Attrs: nounwind uwtable
declare hidden void @aead_chacha_rekey() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @aead_random_set_seed(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i32, ptr %0, align 1
  store i32 %2, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 16), align 16, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %0, i64 4
  %4 = load i32, ptr %3, align 1
  store i32 %4, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 20), align 4, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i32, ptr %5, align 1
  store i32 %6, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 24), align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 12
  %8 = load i32, ptr %7, align 1
  store i32 %8, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 28), align 4, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load i32, ptr %9, align 1
  store i32 %10, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 32), align 16, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %0, i64 20
  %12 = load i32, ptr %11, align 1
  store i32 %12, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 36), align 4, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %0, i64 24
  %14 = load i32, ptr %13, align 1
  store i32 %14, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 40), align 8, !tbaa !5
  %15 = getelementptr inbounds i8, ptr %0, i64 28
  %16 = load i32, ptr %15, align 1
  store i32 %16, ptr getelementptr inbounds (i8, ptr @aead_chacha_state, i64 44), align 4, !tbaa !5
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) getelementptr inbounds (i8, ptr @aead_chacha_state, i64 48), i8 0, i64 16, i1 false)
  tail call void @aead_chacha_rekey()
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: AggressiveInstCombinePass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass