; LLVM IR from AlgoGenesis/C :: Cipher/Caesar (program)

; 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 i32 @mod_inverse(i32 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 willreturn memory(none)
declare ptr @__ctype_b_loc() #2

; Function Attrs: nounwind uwtable
define dso_local signext i8 @decrypt_char(i8 noundef signext %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i8, align 1
  %5 = alloca i8, align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i8 %0, ptr %5, align 1, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !8
  store i32 %2, ptr %7, align 4, !tbaa !8
  %9 = call ptr @__ctype_b_loc() #3
  %10 = load ptr, ptr %9, align 8, !tbaa !10
  %11 = load i8, ptr %5, align 1, !tbaa !5
  %12 = sext i8 %11 to i32
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds i16, ptr %10, i64 %13
  %15 = load i16, ptr %14, align 2, !tbaa !12
  %16 = zext i16 %15 to i32
  %17 = and i32 %16, 1024
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %33

19:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %20 = load i32, ptr %6, align 4, !tbaa !8
  %21 = call i32 @mod_inverse(i32 noundef %20, i32 noundef 26)
  store i32 %21, ptr %8, align 4, !tbaa !8
  %22 = load i32, ptr %8, align 4, !tbaa !8
  %23 = load i8, ptr %5, align 1, !tbaa !5
  %24 = sext i8 %23 to i32
  %25 = sub nsw i32 %24, 65
  %26 = load i32, ptr %7, align 4, !tbaa !8
  %27 = sub nsw i32 %25, %26
  %28 = add nsw i32 %27, 26
  %29 = mul nsw i32 %22, %28
  %30 = srem i32 %29, 26
  %31 = add nsw i32 %30, 65
  %32 = trunc i32 %31 to i8
  store i8 %32, ptr %4, align 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %35

33:                                               ; preds = %3
  %34 = load i8, ptr %5, align 1, !tbaa !5
  store i8 %34, ptr %4, align 1
  br label %35

35:                                               ; preds = %33, %19
  %36 = load i8, ptr %4, align 1
  ret i8 %36
}

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 willreturn memory(none) "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 willreturn memory(none) }
attributes #4 = { 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 = !{!11, !11, i64 0}
!11 = !{!"any pointer", !6, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"short", !6, 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 i32 @mod_inverse(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__ctype_b_loc() local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local signext i8 @decrypt_char(i8 noundef signext %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = tail call ptr @__ctype_b_loc() #2
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = sext i8 %0 to i64
  %7 = getelementptr inbounds i16, ptr %5, i64 %6
  %8 = load i16, ptr %7, align 2, !tbaa !9
  %9 = and i16 %8, 1024
  %.not = icmp eq i16 %9, 0
  br i1 %.not, label %19, label %10

10:                                               ; preds = %3
  %11 = sext i8 %0 to i32
  %12 = tail call i32 @mod_inverse(i32 noundef %1, i32 noundef 26)
  %13 = add nsw i32 %11, -39
  %14 = sub i32 %13, %2
  %15 = mul nsw i32 %12, %14
  %16 = srem i32 %15, 26
  %17 = trunc nsw i32 %16 to i8
  %18 = add nsw i8 %17, 65
  br label %19

19:                                               ; preds = %3, %10
  %.0 = phi i8 [ %18, %10 ], [ %0, %3 ]
  ret i8 %.0
}

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 nofree nosync nounwind willreturn memory(none) "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 willreturn memory(none) }

!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 = !{!"short", !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass