; LLVM IR from rociodellasala/TP3_SO :: Kernel (video_driver)

; 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 void @print_string(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @print_int(i64 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca [16 x i8], align 16
  %4 = alloca i32, align 4
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #3
  call void @llvm.memset.p0.i64(ptr align 16 %3, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %5 = load i64, ptr %2, align 8, !tbaa !5
  %6 = call i32 @countDigits(i64 noundef %5)
  %7 = sub nsw i32 %6, 1
  store i32 %7, ptr %4, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %11, %1
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = icmp sge i32 %9, 0
  br i1 %10, label %11, label %23

11:                                               ; preds = %8
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = urem i64 %12, 10
  %14 = add i64 %13, 48
  %15 = trunc i64 %14 to i8
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [16 x i8], ptr %3, i64 0, i64 %17
  store i8 %15, ptr %18, align 1, !tbaa !11
  %19 = load i64, ptr %2, align 8, !tbaa !5
  %20 = udiv i64 %19, 10
  store i64 %20, ptr %2, align 8, !tbaa !5
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = add nsw i32 %21, -1
  store i32 %22, ptr %4, align 4, !tbaa !9
  br label %8, !llvm.loop !12

23:                                               ; preds = %8
  %24 = getelementptr inbounds [16 x i8], ptr %3, i64 0, i64 0
  call void @print_string(ptr noundef %24)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #3
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
declare dso_local i32 @countDigits(i64 noundef) #1

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 = !{!"long", !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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 void @print_string(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @print_int(i64 noundef %0) local_unnamed_addr #1 {
  %2 = alloca [16 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #3
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %2, i8 0, i64 16, i1 false)
  %3 = tail call i32 @countDigits(i64 noundef %0)
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %5 = zext nneg i32 %3 to i64
  %xtraiter = and i64 %5, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader
  %indvars.iv.next.prol = add nsw i64 %5, -1
  %6 = urem i64 %0, 10
  %7 = trunc nuw nsw i64 %6 to i8
  %8 = or disjoint i8 %7, 48
  %9 = getelementptr inbounds [16 x i8], ptr %2, i64 0, i64 %indvars.iv.next.prol
  store i8 %8, ptr %9, align 1, !tbaa !5
  %10 = udiv i64 %0, 10
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %indvars.iv.unr = phi i64 [ %5, %.lr.ph.preheader ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %.067.unr = phi i64 [ %0, %.lr.ph.preheader ], [ %10, %.lr.ph.prol ]
  %11 = icmp eq i32 %3, 1
  br i1 %11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %.067 = phi i64 [ %21, %.lr.ph ], [ %.067.unr, %.lr.ph.prol.loopexit ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %12 = urem i64 %.067, 10
  %13 = trunc nuw nsw i64 %12 to i8
  %14 = or disjoint i8 %13, 48
  %15 = getelementptr inbounds [16 x i8], ptr %2, i64 0, i64 %indvars.iv.next
  store i8 %14, ptr %15, align 1, !tbaa !5
  %16 = udiv i64 %.067, 10
  %indvars.iv.next.1 = add nsw i64 %indvars.iv, -2
  %17 = urem i64 %16, 10
  %18 = trunc nuw nsw i64 %17 to i8
  %19 = or disjoint i8 %18, 48
  %20 = getelementptr inbounds [16 x i8], ptr %2, i64 0, i64 %indvars.iv.next.1
  store i8 %19, ptr %20, align 1, !tbaa !5
  %21 = udiv i64 %.067, 100
  %22 = icmp ugt i64 %indvars.iv.next, 1
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %1
  call void @print_string(ptr noundef nonnull %2)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #3
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
declare dso_local i32 @countDigits(i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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