; LLVM IR from AllenDowney/ExercisesInC :: exercises/ex10 (signal_example_soln)

; 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"

@score = external dso_local global i32, align 4
@end_flag = external dso_local global i32, align 4
@.str.1 = external hidden unnamed_addr constant [23 x i8], align 1
@stdin = external global ptr, align 8
@.str.2 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [11 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @catch_signal(i32 noundef, ptr noundef) #0

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @end_game(i32 noundef) #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @times_up(i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca [4 x i8], align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  %8 = call i32 @catch_signal(i32 noundef 14, ptr noundef @times_up)
  %9 = call i32 @catch_signal(i32 noundef 2, ptr noundef @end_game)
  %10 = call i64 @time(ptr noundef null) #5
  %11 = trunc i64 %10 to i32
  call void @srandom(i32 noundef %11) #5
  br label %12

12:                                               ; preds = %54, %0
  br label %13

13:                                               ; preds = %12
  %14 = call i32 @rand() #5
  %15 = srem i32 %14, 11
  store i32 %15, ptr %2, align 4, !tbaa !5
  %16 = call i32 @rand() #5
  %17 = srem i32 %16, 11
  store i32 %17, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %18, i32 noundef %19)
  %21 = call i32 @alarm(i32 noundef 5) #5
  br label %22

22:                                               ; preds = %33, %13
  br label %23

23:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %24 = getelementptr inbounds [4 x i8], ptr %5, i64 0, i64 0
  %25 = load ptr, ptr @stdin, align 8, !tbaa !9
  %26 = call ptr @fgets(ptr noundef %24, i32 noundef 4, ptr noundef %25)
  store ptr %26, ptr %6, align 8, !tbaa !9
  %27 = load ptr, ptr %6, align 8, !tbaa !9
  %28 = icmp ne ptr %27, null
  br i1 %28, label %29, label %30

29:                                               ; preds = %23
  store i32 5, ptr %7, align 4
  br label %31

30:                                               ; preds = %23
  store i32 0, ptr %7, align 4
  br label %31

31:                                               ; preds = %30, %29
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  %32 = load i32, ptr %7, align 4
  switch i32 %32, label %55 [
    i32 0, label %33
    i32 5, label %34
  ]

33:                                               ; preds = %31
  br label %22

34:                                               ; preds = %31
  %35 = getelementptr inbounds [4 x i8], ptr %5, i64 0, i64 0
  %36 = call i32 @atoi(ptr noundef %35) #6
  store i32 %36, ptr %4, align 4, !tbaa !5
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = load i32, ptr %2, align 4, !tbaa !5
  %39 = load i32, ptr %3, align 4, !tbaa !5
  %40 = mul nsw i32 %38, %39
  %41 = icmp eq i32 %37, %40
  br i1 %41, label %42, label %46

42:                                               ; preds = %34
  %43 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %44 = load i32, ptr @score, align 4, !tbaa !5
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr @score, align 4, !tbaa !5
  br label %48

46:                                               ; preds = %34
  %47 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %48

48:                                               ; preds = %46, %42
  %49 = load i32, ptr @score, align 4, !tbaa !5
  %50 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i32 noundef %49)
  %51 = load i32, ptr @end_flag, align 4, !tbaa !5
  %52 = icmp ne i32 %51, 0
  br i1 %52, label %53, label %54

53:                                               ; preds = %48
  call void @end_game(i32 noundef 0)
  br label %54

54:                                               ; preds = %53, %48
  br label %12

55:                                               ; preds = %31
  unreachable
}

; Function Attrs: nounwind
declare void @srandom(i32 noundef) #3

; Function Attrs: nounwind
declare i64 @time(ptr noundef) #3

; Function Attrs: nounwind
declare i32 @rand() #3

; Function Attrs: nounwind
declare i32 @alarm(i32 noundef) #3

declare ptr @fgets(ptr noundef, i32 noundef, ptr noundef) #2

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #4

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 = { "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 "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 = { inlinehint nounwind willreturn memory(read) 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 #5 = { nounwind }
attributes #6 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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"

@score = external dso_local local_unnamed_addr global i32, align 4
@end_flag = external dso_local local_unnamed_addr global i32, align 4
@.str.1 = external hidden unnamed_addr constant [23 x i8], align 1
@stdin = external local_unnamed_addr global ptr, align 8
@.str.2 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [11 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @catch_signal(i32 noundef, ptr noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @end_game(i32 noundef) #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @times_up(i32 noundef) #0

; Function Attrs: noreturn nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #3 {
  %1 = alloca [4 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #6
  %2 = tail call i32 @catch_signal(i32 noundef 14, ptr noundef nonnull @times_up)
  %3 = tail call i32 @catch_signal(i32 noundef 2, ptr noundef nonnull @end_game)
  %4 = tail call i64 @time(ptr noundef null) #6
  %5 = trunc i64 %4 to i32
  tail call void @srandom(i32 noundef %5) #6
  br label %6

6:                                                ; preds = %.backedge, %0
  %7 = call i32 @rand() #6
  %8 = srem i32 %7, 11
  %9 = call i32 @rand() #6
  %10 = srem i32 %9, 11
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %8, i32 noundef %10)
  %12 = call i32 @alarm(i32 noundef 5) #6
  br label %13

13:                                               ; preds = %13, %6
  %14 = load ptr, ptr @stdin, align 8, !tbaa !5
  %15 = call ptr @fgets(ptr noundef nonnull %1, i32 noundef 4, ptr noundef %14)
  %.not = icmp eq ptr %15, null
  br i1 %.not, label %13, label %16

16:                                               ; preds = %13
  %17 = call i32 @atoi(ptr nocapture noundef %1) #7
  %18 = mul nsw i32 %10, %8
  %19 = icmp eq i32 %17, %18
  br i1 %19, label %20, label %24

20:                                               ; preds = %16
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %22 = load i32, ptr @score, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr @score, align 4, !tbaa !9
  br label %26

24:                                               ; preds = %16
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %.pre = load i32, ptr @score, align 4, !tbaa !9
  br label %26

26:                                               ; preds = %24, %20
  %27 = phi i32 [ %.pre, %24 ], [ %23, %20 ]
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i32 noundef %27)
  %29 = load i32, ptr @end_flag, align 4, !tbaa !9
  %.not6 = icmp eq i32 %29, 0
  br i1 %.not6, label %.backedge, label %30

30:                                               ; preds = %26
  call void @end_game(i32 noundef 0)
  br label %.backedge

.backedge:                                        ; preds = %30, %26
  br label %6
}

; Function Attrs: nounwind
declare void @srandom(i32 noundef) local_unnamed_addr #4

; Function Attrs: nounwind
declare i64 @time(ptr noundef) local_unnamed_addr #4

; Function Attrs: nounwind
declare i32 @rand() local_unnamed_addr #4

; Function Attrs: nounwind
declare i32 @alarm(i32 noundef) local_unnamed_addr #4

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

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #5

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { noreturn 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 #4 = { 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 #5 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 #6 = { nounwind }
attributes #7 = { 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}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass