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

; Function Attrs: nounwind uwtable
define dso_local void @postdigits(i8 noundef signext %0, i32 noundef %1) #1 {
  %3 = alloca i8, align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i8 %0, ptr %3, align 1, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !8
  br label %6

6:                                                ; preds = %16, %2
  %7 = load i32, ptr %5, align 4, !tbaa !8
  %8 = load i32, ptr %4, align 4, !tbaa !8
  %9 = icmp slt i32 %7, %8
  br i1 %9, label %10, label %19

10:                                               ; preds = %6
  %11 = load i8, ptr %3, align 1, !tbaa !5
  %12 = load i32, ptr @i, align 4, !tbaa !8
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr @i, align 4, !tbaa !8
  %14 = sext i32 %12 to i64
  %15 = getelementptr inbounds [1000 x i8], ptr @roman_Number, i64 0, i64 %14
  store i8 %11, ptr %15, align 1, !tbaa !5
  br label %16

16:                                               ; preds = %10
  %17 = load i32, ptr %5, align 4, !tbaa !8
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %5, align 4, !tbaa !8
  br label %6, !llvm.loop !10

19:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

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

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 }

!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 = distinct !{!10, !11}
!11 = !{!"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"

@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 @postdigits(i8 noundef signext %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %7

.lr.ph.preheader:                                 ; preds = %2
  %i.promoted = load i32, ptr @i, align 4, !tbaa !5
  %4 = sext i32 %i.promoted to i64
  %scevgep = getelementptr i8, ptr @roman_Number, i64 %4
  %5 = zext nneg i32 %1 to i64
  tail call void @llvm.memset.p0.i64(ptr align 1 %scevgep, i8 %0, i64 %5, i1 false), !tbaa !9
  %6 = add i32 %i.promoted, %1
  store i32 %6, ptr @i, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %.lr.ph.preheader, %2
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

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" }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass