; LLVM IR from tum-i4/obfuscation-benchmarks :: basic-algorithms (romannumerals)

; 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"

@i = external dso_local global i32, align 4
@roman_Number = external dso_local global [1000 x i8], align 16

; Function Attrs: nounwind uwtable
define dso_local void @predigits(i8 noundef signext %0, i8 noundef signext %1) #0 {
  %3 = alloca i8, align 1
  %4 = alloca i8, align 1
  store i8 %0, ptr %3, align 1, !tbaa !5
  store i8 %1, ptr %4, align 1, !tbaa !5
  %5 = load i8, ptr %3, align 1, !tbaa !5
  %6 = load i32, ptr @i, align 4, !tbaa !8
  %7 = add nsw i32 %6, 1
  store i32 %7, ptr @i, align 4, !tbaa !8
  %8 = sext i32 %6 to i64
  %9 = getelementptr inbounds [1000 x i8], ptr @roman_Number, i64 0, i64 %8
  store i8 %5, ptr %9, align 1, !tbaa !5
  %10 = load i8, ptr %4, align 1, !tbaa !5
  %11 = load i32, ptr @i, align 4, !tbaa !8
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr @i, align 4, !tbaa !8
  %13 = sext i32 %11 to i64
  %14 = getelementptr inbounds [1000 x i8], ptr @roman_Number, i64 0, i64 %13
  store i8 %10, ptr %14, align 1, !tbaa !5
  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)"}
!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}


; 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"

@i = external dso_local local_unnamed_addr global i32, align 4
@roman_Number = external dso_local local_unnamed_addr global [1000 x i8], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @predigits(i8 noundef signext %0, i8 noundef signext %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @i, align 4, !tbaa !5
  %4 = add nsw i32 %3, 1
  %5 = sext i32 %3 to i64
  %6 = getelementptr inbounds [1000 x i8], ptr @roman_Number, i64 0, i64 %5
  store i8 %0, ptr %6, align 1, !tbaa !9
  %7 = add nsw i32 %3, 2
  store i32 %7, ptr @i, align 4, !tbaa !5
  %8 = sext i32 %4 to i64
  %9 = getelementptr inbounds [1000 x i8], ptr @roman_Number, i64 0, i64 %8
  store i8 %1, ptr %9, align 1, !tbaa !9
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, 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" }

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


; Effective O3 passes: DSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass