; LLVM IR from number571/c-crypto-lib :: crypto/cipher (substitution)

; 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"

@__alpha = external hidden global [2 x [127 x i8]], align 16

; Function Attrs: nounwind uwtable
define dso_local signext i8 @set_alpha_substitution(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i8, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = call i64 @strlen(ptr noundef %8) #5
  store i64 %9, ptr %6, align 8, !tbaa !9
  %10 = load i64, ptr %6, align 8, !tbaa !9
  %11 = icmp uge i64 %10, 127
  br i1 %11, label %12, label %13

12:                                               ; preds = %2
  store i8 1, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %24

13:                                               ; preds = %2
  %14 = load i64, ptr %6, align 8, !tbaa !9
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = call i64 @strlen(ptr noundef %15) #5
  %17 = icmp ne i64 %14, %16
  br i1 %17, label %18, label %19

18:                                               ; preds = %13
  store i8 2, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %24

19:                                               ; preds = %13
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = call ptr @strcpy(ptr noundef @__alpha, ptr noundef %20) #4
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = call ptr @strcpy(ptr noundef getelementptr inbounds ([2 x [127 x i8]], ptr @__alpha, i64 0, i64 1), ptr noundef %22) #4
  store i8 0, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %24

24:                                               ; preds = %19, %18, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %25 = load i8, ptr %3, align 1
  ret i8 %25
}

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

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #2

; Function Attrs: nounwind
declare ptr @strcpy(ptr noundef, ptr noundef) #3

; 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 willreturn memory(read) "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 "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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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", !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"

@__alpha = external hidden global [2 x [127 x i8]], align 16

; Function Attrs: mustprogress nofree nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local signext range(i8 0, 3) i8 @set_alpha_substitution(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #3
  %4 = icmp ugt i64 %3, 126
  br i1 %4, label %10, label %5

5:                                                ; preds = %2
  %6 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #3
  %.not = icmp eq i64 %3, %6
  br i1 %.not, label %7, label %10

7:                                                ; preds = %5
  %8 = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @__alpha, ptr noundef nonnull dereferenceable(1) %0) #4
  %9 = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @__alpha, i64 127), ptr noundef nonnull dereferenceable(1) %1) #4
  br label %10

10:                                               ; preds = %5, %2, %7
  %.0 = phi i8 [ 0, %7 ], [ 1, %2 ], [ 2, %5 ]
  ret i8 %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: readwrite)
declare ptr @strcpy(ptr noalias noundef returned writeonly, ptr noalias nocapture noundef readonly) local_unnamed_addr #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(readwrite, inaccessiblemem: none) 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 nounwind willreturn memory(argmem: read) "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 = { mustprogress nofree nounwind willreturn memory(argmem: readwrite) "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(read) }
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)"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass