; LLVM IR from freddiev4/dailyprogrammerchallenges :: Intermediate Challenges/Challenge 0004 Intermediate/solutions (solution)

; 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"

@stderr = external global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [53 x i8], align 1

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #0

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local signext i8 @TYPEtochar(i32 noundef %0) #2 {
  %2 = alloca i8, align 1
  %3 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %4 = load i32, ptr %3, align 4, !tbaa !5
  switch i32 %4, label %15 [
    i32 0, label %5
    i32 1, label %6
    i32 2, label %7
    i32 3, label %8
    i32 4, label %9
    i32 5, label %10
    i32 6, label %11
    i32 7, label %12
    i32 8, label %13
    i32 9, label %14
  ]

5:                                                ; preds = %1
  store i8 36, ptr %2, align 1
  br label %18

6:                                                ; preds = %1
  store i8 38, ptr %2, align 1
  br label %18

7:                                                ; preds = %1
  store i8 94, ptr %2, align 1
  br label %18

8:                                                ; preds = %1
  store i8 124, ptr %2, align 1
  br label %18

9:                                                ; preds = %1
  store i8 37, ptr %2, align 1
  br label %18

10:                                               ; preds = %1
  store i8 92, ptr %2, align 1
  br label %18

11:                                               ; preds = %1
  store i8 42, ptr %2, align 1
  br label %18

12:                                               ; preds = %1
  store i8 47, ptr %2, align 1
  br label %18

13:                                               ; preds = %1
  store i8 43, ptr %2, align 1
  br label %18

14:                                               ; preds = %1
  store i8 45, ptr %2, align 1
  br label %18

15:                                               ; preds = %1
  %16 = load ptr, ptr @stderr, align 8, !tbaa !9
  %17 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef @.str.4, ptr noundef @.str.11) #3
  call void @exit(i32 noundef 1) #4
  unreachable

18:                                               ; preds = %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
  %19 = load i8, ptr %2, align 1
  ret i8 %19
}

attributes #0 = { 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 #1 = { noreturn 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 #2 = { 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 #3 = { nounwind }
attributes #4 = { noreturn 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [53 x i8], align 1
@switch.table.TYPEtochar = private unnamed_addr constant [10 x i8] c"$&^|%\\*/+-", align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local signext range(i8 36, 125) i8 @TYPEtochar(i32 noundef %0) local_unnamed_addr #2 {
  %2 = icmp ult i32 %0, 10
  br i1 %2, label %switch.lookup, label %3

3:                                                ; preds = %1
  %4 = load ptr, ptr @stderr, align 8, !tbaa !5
  %5 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %4, ptr noundef nonnull @.str.4, ptr noundef nonnull @.str.11) #3
  tail call void @exit(i32 noundef 1) #4
  unreachable

switch.lookup:                                    ; preds = %1
  %6 = zext nneg i32 %0 to i64
  %switch.gep = getelementptr inbounds [10 x i8], ptr @switch.table.TYPEtochar, i64 0, i64 %6
  %switch.load = load i8, ptr %switch.gep, align 1
  ret i8 %switch.load
}

attributes #0 = { nofree 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 #1 = { noreturn 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 #2 = { 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 #3 = { cold nounwind }
attributes #4 = { noreturn 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"}


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