; LLVM IR from Northstrix/Encrypted_Data_Vault :: Raspberry_Pi_Pico_plus_ESP32/Firmware_for_Raspberry_Pi_Pico (serpent)

; 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.serpent_key_t = type { [33 x [4 x i32]] }

; Function Attrs: nounwind uwtable
define dso_local void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i8, align 1
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.serpent_key_t, ptr %9, i32 0, i32 0
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [33 x [4 x i32]], ptr %10, i64 0, i64 %12
  store ptr %13, ptr %8, align 8, !tbaa !5
  store i8 0, ptr %7, align 1, !tbaa !11
  br label %14

14:                                               ; preds = %30, %3
  %15 = load i8, ptr %7, align 1, !tbaa !11
  %16 = zext i8 %15 to i32
  %17 = icmp slt i32 %16, 4
  br i1 %17, label %18, label %33

18:                                               ; preds = %14
  %19 = load ptr, ptr %8, align 8, !tbaa !5
  %20 = load i8, ptr %7, align 1, !tbaa !11
  %21 = zext i8 %20 to i64
  %22 = getelementptr inbounds [4 x i32], ptr %19, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !11
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load i8, ptr %7, align 1, !tbaa !11
  %26 = zext i8 %25 to i64
  %27 = getelementptr inbounds [4 x i32], ptr %24, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !11
  %29 = xor i32 %28, %23
  store i32 %29, ptr %27, align 4, !tbaa !11
  br label %30

30:                                               ; preds = %18
  %31 = load i8, ptr %7, align 1, !tbaa !11
  %32 = add i8 %31, 1
  store i8 %32, ptr %7, align 1, !tbaa !11
  br label %14, !llvm.loop !12

33:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  ret void
}

; 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

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 = { 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local void @serpent_whiten(ptr nocapture noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %2 to i64
  %5 = getelementptr inbounds [33 x [4 x i32]], ptr %1, i64 0, i64 %4, i64 0
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = load i32, ptr %0, align 4, !tbaa !5
  %8 = xor i32 %7, %6
  store i32 %8, ptr %0, align 4, !tbaa !5
  %9 = getelementptr inbounds [33 x [4 x i32]], ptr %1, i64 0, i64 %4, i64 1
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %0, i64 4
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = xor i32 %12, %10
  store i32 %13, ptr %11, align 4, !tbaa !5
  %14 = getelementptr inbounds [33 x [4 x i32]], ptr %1, i64 0, i64 %4, i64 2
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %0, i64 8
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = xor i32 %17, %15
  store i32 %18, ptr %16, align 4, !tbaa !5
  %19 = getelementptr inbounds [33 x [4 x i32]], ptr %1, i64 0, i64 %4, i64 3
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = getelementptr inbounds i8, ptr %0, i64 12
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = xor i32 %22, %20
  store i32 %23, ptr %21, align 4, !tbaa !5
  ret void
}

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


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