; 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"

; Function Attrs: nounwind uwtable
declare dso_local void @serpent_whiten(ptr noundef, ptr noundef, i32 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: nounwind uwtable
declare dso_local void @serpent_subbytes(ptr noundef, i32 noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @serpent_lt(ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @serpent_encrypt(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 %4, align 8, !tbaa !5
  store ptr %9, ptr %8, align 8, !tbaa !5
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = icmp eq i32 %10, 1
  br i1 %11, label %12, label %36

12:                                               ; preds = %3
  store i8 32, ptr %7, align 1, !tbaa !11
  %13 = load ptr, ptr %8, align 8, !tbaa !5
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load i8, ptr %7, align 1, !tbaa !11
  %16 = sext i8 %15 to i32
  call void @serpent_whiten(ptr noundef %13, ptr noundef %14, i32 noundef %16)
  br label %17

17:                                               ; preds = %32, %12
  %18 = load i8, ptr %7, align 1, !tbaa !11
  %19 = add i8 %18, -1
  store i8 %19, ptr %7, align 1, !tbaa !11
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = load i8, ptr %7, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = load i32, ptr %6, align 4, !tbaa !9
  call void @serpent_subbytes(ptr noundef %20, i32 noundef %22, i32 noundef %23)
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load i8, ptr %7, align 1, !tbaa !11
  %27 = sext i8 %26 to i32
  call void @serpent_whiten(ptr noundef %24, ptr noundef %25, i32 noundef %27)
  %28 = load i8, ptr %7, align 1, !tbaa !11
  %29 = sext i8 %28 to i32
  %30 = icmp eq i32 %29, 0
  br i1 %30, label %31, label %32

31:                                               ; preds = %17
  br label %35

32:                                               ; preds = %17
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  %34 = load i32, ptr %6, align 4, !tbaa !9
  call void @serpent_lt(ptr noundef %33, i32 noundef %34)
  br label %17

35:                                               ; preds = %31
  br label %59

36:                                               ; preds = %3
  store i8 0, ptr %7, align 1, !tbaa !11
  br label %37

37:                                               ; preds = %51, %36
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = load i8, ptr %7, align 1, !tbaa !11
  %41 = sext i8 %40 to i32
  call void @serpent_whiten(ptr noundef %38, ptr noundef %39, i32 noundef %41)
  %42 = load ptr, ptr %8, align 8, !tbaa !5
  %43 = load i8, ptr %7, align 1, !tbaa !11
  %44 = sext i8 %43 to i32
  %45 = load i32, ptr %6, align 4, !tbaa !9
  call void @serpent_subbytes(ptr noundef %42, i32 noundef %44, i32 noundef %45)
  %46 = load i8, ptr %7, align 1, !tbaa !11
  %47 = add i8 %46, 1
  store i8 %47, ptr %7, align 1, !tbaa !11
  %48 = sext i8 %47 to i32
  %49 = icmp eq i32 %48, 32
  br i1 %49, label %50, label %51

50:                                               ; preds = %37
  br label %54

51:                                               ; preds = %37
  %52 = load ptr, ptr %8, align 8, !tbaa !5
  %53 = load i32, ptr %6, align 4, !tbaa !9
  call void @serpent_lt(ptr noundef %52, i32 noundef %53)
  br label %37

54:                                               ; preds = %50
  %55 = load ptr, ptr %8, align 8, !tbaa !5
  %56 = load ptr, ptr %5, align 8, !tbaa !5
  %57 = load i8, ptr %7, align 1, !tbaa !11
  %58 = sext i8 %57 to i32
  call void @serpent_whiten(ptr noundef %55, ptr noundef %56, i32 noundef %58)
  br label %59

59:                                               ; preds = %54, %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  ret void
}

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}


; 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
declare dso_local void @serpent_whiten(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @serpent_subbytes(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @serpent_lt(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @serpent_encrypt(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %2, 1
  br i1 %4, label %5, label %.preheader

.preheader:                                       ; preds = %3
  tail call void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef 0)
  tail call void @serpent_subbytes(ptr noundef %0, i32 noundef 0, i32 noundef %2)
  br label %8

5:                                                ; preds = %3
  tail call void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef 32)
  tail call void @serpent_subbytes(ptr noundef %0, i32 noundef 31, i32 noundef 1)
  tail call void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef 31)
  br label %6

6:                                                ; preds = %5, %6
  %indvars.iv30 = phi i32 [ 31, %5 ], [ %indvars.iv.next31, %6 ]
  tail call void @serpent_lt(ptr noundef %0, i32 noundef 1)
  %indvars.iv.next31 = add nsw i32 %indvars.iv30, -1
  tail call void @serpent_subbytes(ptr noundef %0, i32 noundef %indvars.iv.next31, i32 noundef 1)
  tail call void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef %indvars.iv.next31)
  %7 = icmp eq i32 %indvars.iv.next31, 0
  br i1 %7, label %.loopexit, label %6

8:                                                ; preds = %.preheader, %8
  %indvars.iv = phi i32 [ 1, %.preheader ], [ %indvars.iv.next, %8 ]
  tail call void @serpent_lt(ptr noundef %0, i32 noundef %2)
  tail call void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef %indvars.iv)
  tail call void @serpent_subbytes(ptr noundef %0, i32 noundef %indvars.iv, i32 noundef %2)
  %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
  %9 = icmp eq i32 %indvars.iv.next, 32
  br i1 %9, label %10, label %8

10:                                               ; preds = %8
  tail call void @serpent_whiten(ptr noundef %0, ptr noundef %1, i32 noundef 32)
  br label %.loopexit

.loopexit:                                        ; preds = %6, %10
  ret void
}

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" }

!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)"}


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