; LLVM IR from AllenDowney/ExercisesInC :: exercises/ex02.5 (find_track)

; 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"

@tracks = external dso_local global [5 x [80 x i8]], align 16
@.str = external hidden unnamed_addr constant [16 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @find_track(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %23, %1
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = icmp slt i32 %5, 5
  br i1 %6, label %7, label %26

7:                                                ; preds = %4
  %8 = load i32, ptr %3, align 4, !tbaa !9
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [5 x [80 x i8]], ptr @tracks, i64 0, i64 %9
  %11 = getelementptr inbounds [80 x i8], ptr %10, i64 0, i64 0
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = call ptr @strstr(ptr noundef %11, ptr noundef %12) #5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %22

15:                                               ; preds = %7
  %16 = load i32, ptr %3, align 4, !tbaa !9
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [5 x [80 x i8]], ptr @tracks, i64 0, i64 %18
  %20 = getelementptr inbounds [80 x i8], ptr %19, i64 0, i64 0
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %16, ptr noundef %20)
  br label %22

22:                                               ; preds = %15, %7
  br label %23

23:                                               ; preds = %22
  %24 = load i32, ptr %3, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !11

26:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind willreturn memory(read)
declare ptr @strstr(ptr noundef, ptr noundef) #2

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind willreturn memory(read) "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 = { "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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@tracks = external dso_local global [5 x [80 x i8]], align 16
@.str = external hidden unnamed_addr constant [16 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @find_track(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) @tracks, ptr noundef nonnull dereferenceable(1) %0) #3
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %5, label %3

3:                                                ; preds = %1
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef 0, ptr noundef nonnull @tracks)
  br label %5

5:                                                ; preds = %1, %3
  %6 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @tracks, i64 80), ptr noundef nonnull dereferenceable(1) %0) #3
  %.not.1 = icmp eq ptr %6, null
  br i1 %.not.1, label %9, label %7

7:                                                ; preds = %5
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef 1, ptr noundef nonnull getelementptr inbounds (i8, ptr @tracks, i64 80))
  br label %9

9:                                                ; preds = %7, %5
  %10 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @tracks, i64 160), ptr noundef nonnull dereferenceable(1) %0) #3
  %.not.2 = icmp eq ptr %10, null
  br i1 %.not.2, label %13, label %11

11:                                               ; preds = %9
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef 2, ptr noundef nonnull getelementptr inbounds (i8, ptr @tracks, i64 160))
  br label %13

13:                                               ; preds = %11, %9
  %14 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @tracks, i64 240), ptr noundef nonnull dereferenceable(1) %0) #3
  %.not.3 = icmp eq ptr %14, null
  br i1 %.not.3, label %17, label %15

15:                                               ; preds = %13
  %16 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef 3, ptr noundef nonnull getelementptr inbounds (i8, ptr @tracks, i64 240))
  br label %17

17:                                               ; preds = %15, %13
  %18 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @tracks, i64 320), ptr noundef nonnull dereferenceable(1) %0) #3
  %.not.4 = icmp eq ptr %18, null
  br i1 %.not.4, label %21, label %19

19:                                               ; preds = %17
  %20 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef 4, ptr noundef nonnull getelementptr inbounds (i8, ptr @tracks, i64 320))
  br label %21

21:                                               ; preds = %19, %17
  ret void
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare ptr @strstr(ptr noundef, ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 = { 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 #3 = { nounwind willreturn memory(read) }

!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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass