; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local signext i8 @decrypt_char(i8 noundef signext, i32 noundef, i32 noundef) #1

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__ctype_toupper_loc() #2

; Function Attrs: nounwind uwtable
define dso_local void @decrypt(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %41, %3
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds i8, ptr %11, i64 %13
  %15 = load i8, ptr %14, align 1, !tbaa !11
  %16 = sext i8 %15 to i32
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %19, label %18

18:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %44

19:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %20 = call ptr @__ctype_toupper_loc() #4
  %21 = load ptr, ptr %20, align 8, !tbaa !5
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i8, ptr %22, i64 %24
  %26 = load i8, ptr %25, align 1, !tbaa !11
  %27 = sext i8 %26 to i32
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %21, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !9
  store i32 %30, ptr %8, align 4, !tbaa !9
  %31 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %31, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = trunc i32 %32 to i8
  %34 = load i32, ptr %5, align 4, !tbaa !9
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = call signext i8 @decrypt_char(i8 noundef signext %33, i32 noundef %34, i32 noundef %35)
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i8, ptr %37, i64 %39
  store i8 %36, ptr %40, align 1, !tbaa !11
  br label %41

41:                                               ; preds = %19
  %42 = load i32, ptr %7, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %7, align 4, !tbaa !9
  br label %10, !llvm.loop !12

44:                                               ; preds = %18
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 }
attributes #4 = { 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 = !{!"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: nounwind uwtable
declare dso_local signext i8 @decrypt_char(i8 noundef signext, i32 noundef, i32 noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local void @decrypt(ptr nocapture noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = load i8, ptr %0, align 1, !tbaa !5
  %.not11 = icmp eq i8 %4, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %5 = tail call ptr @__ctype_toupper_loc() #2
  br label %6

._crit_edge:                                      ; preds = %6, %3
  ret void

6:                                                ; preds = %.lr.ph, %6
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %6 ]
  %7 = phi i8 [ %4, %.lr.ph ], [ %16, %6 ]
  %8 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %9 = load ptr, ptr %5, align 8, !tbaa !8
  %10 = sext i8 %7 to i64
  %11 = getelementptr inbounds i32, ptr %9, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !10
  %13 = trunc i32 %12 to i8
  %14 = tail call signext i8 @decrypt_char(i8 noundef signext %13, i32 noundef %1, i32 noundef %2)
  store i8 %14, ptr %8, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %.not = icmp eq i8 %16, 0
  br i1 %.not, label %._crit_edge, label %6, !llvm.loop !12
}

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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !6, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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