; LLVM IR from ACM-VIT/Algos-for-all-Amigos :: Computer_Science/5_Interview_Questions (p02_fizzbuzz)

; 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.4 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.7 = 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

declare i32 @printf(ptr noundef, ...) #1

; 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
define dso_local void @decent_solution(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %30, %1
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp sle i32 %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %33

10:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = srem i32 %11, 3
  %13 = icmp eq i32 %12, 0
  br i1 %13, label %14, label %16

14:                                               ; preds = %10
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %14, %10
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = srem i32 %17, 5
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %22

20:                                               ; preds = %16
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %20, %16
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = icmp eq i32 %23, 0
  br i1 %24, label %25, label %28

25:                                               ; preds = %22
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.6, i32 noundef %26)
  br label %28

28:                                               ; preds = %25, %22
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %30

30:                                               ; preds = %28
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %3, align 4, !tbaa !5
  br label %5, !llvm.loop !9

33:                                               ; preds = %9
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 }

!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 = distinct !{!9, !10}
!10 = !{!"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.4 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [2 x i8], align 1

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

; Function Attrs: nofree nounwind uwtable
define dso_local void @decent_solution(i32 noundef %0) local_unnamed_addr #1 {
  %.not10 = icmp slt i32 %0, 1
  br i1 %.not10, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %11, %1
  ret void

.lr.ph:                                           ; preds = %1, %11
  %.0711 = phi i32 [ %13, %11 ], [ 1, %1 ]
  %2 = urem i32 %.0711, 3
  %.not9 = icmp eq i32 %2, 0
  br i1 %.not9, label %3, label %.thread12

3:                                                ; preds = %.lr.ph
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %5 = urem i32 %.0711, 5
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %.thread, label %11

.thread12:                                        ; preds = %.lr.ph
  %7 = urem i32 %.0711, 5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %.thread, label %.thread13

.thread:                                          ; preds = %.thread12, %3
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  br label %11

.thread13:                                        ; preds = %.thread12
  %10 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6, i32 noundef %.0711)
  br label %11

11:                                               ; preds = %3, %.thread, %.thread13
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7)
  %13 = add nuw i32 %.0711, 1
  %exitcond.not = icmp eq i32 %.0711, %0
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5
}

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 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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