; LLVM IR from kaynewbie/algorithm :: algorithm/CodingInterviews (question-17)

; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; 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 @printNumIn(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i8, align 1
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #3
  store i8 1, ptr %3, align 1, !tbaa !9
  br label %4

4:                                                ; preds = %26, %1
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = load i8, ptr %5, align 1, !tbaa !11
  %7 = sext i8 %6 to i32
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %9, label %29

9:                                                ; preds = %4
  %10 = load i8, ptr %3, align 1, !tbaa !9, !range !12, !noundef !13
  %11 = trunc i8 %10 to i1
  br i1 %11, label %12, label %18

12:                                               ; preds = %9
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = load i8, ptr %13, align 1, !tbaa !11
  %15 = sext i8 %14 to i32
  %16 = icmp ne i32 %15, 48
  br i1 %16, label %17, label %18

17:                                               ; preds = %12
  store i8 0, ptr %3, align 1, !tbaa !9
  br label %18

18:                                               ; preds = %17, %12, %9
  %19 = load i8, ptr %3, align 1, !tbaa !9, !range !12, !noundef !13
  %20 = trunc i8 %19 to i1
  br i1 %20, label %26, label %21

21:                                               ; preds = %18
  %22 = load ptr, ptr %2, align 8, !tbaa !5
  %23 = load i8, ptr %22, align 1, !tbaa !11
  %24 = sext i8 %23 to i32
  %25 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %24)
  br label %26

26:                                               ; preds = %21, %18
  %27 = load ptr, ptr %2, align 8, !tbaa !5
  %28 = getelementptr inbounds i8, ptr %27, i32 1
  store ptr %28, ptr %2, align 8, !tbaa !5
  br label %4, !llvm.loop !14

29:                                               ; preds = %4
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #3
  ret void
}

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

declare i32 @printf(ptr noundef, ...) #2

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 = { "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 }

!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 = !{!"_Bool", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{i8 0, i8 2}
!13 = !{}
!14 = distinct !{!14, !15}
!15 = !{!"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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @printNumIn(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %.not9 = icmp eq i8 %2, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %9
  %3 = phi i8 [ %11, %9 ], [ %2, %1 ]
  %.011 = phi i8 [ %.1, %9 ], [ 1, %1 ]
  %.0510 = phi ptr [ %10, %9 ], [ %0, %1 ]
  %4 = trunc nuw i8 %.011 to i1
  %.not7 = icmp ne i8 %3, 48
  %or.cond.not = and i1 %.not7, %4
  %.1 = select i1 %or.cond.not, i8 0, i8 %.011
  %5 = trunc nuw i8 %.1 to i1
  br i1 %5, label %9, label %6

6:                                                ; preds = %.lr.ph
  %7 = sext i8 %3 to i32
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %7)
  br label %9

9:                                                ; preds = %6, %.lr.ph
  %10 = getelementptr inbounds i8, ptr %.0510, i64 1
  %11 = load i8, ptr %10, align 1, !tbaa !5
  %.not = icmp eq i8 %11, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %9, %1
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { 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" }

!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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass