; LLVM IR from freddiev4/dailyprogrammerchallenges :: Easy Challenges/Challenge 0011 Easy/solutions (solution)

; 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 [26 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [26 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local zeroext i16 @calc_dow(i16 noundef zeroext, i16 noundef zeroext, i16 noundef zeroext) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i16, align 2
  %7 = alloca i16, align 2
  %8 = alloca i16, align 2
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 2, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr %8) #3
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %6, ptr noundef %7, ptr noundef %8)
  %11 = load i16, ptr %6, align 2, !tbaa !11
  %12 = load i16, ptr %7, align 2, !tbaa !11
  %13 = load i16, ptr %8, align 2, !tbaa !11
  %14 = call zeroext i16 @calc_dow(i16 noundef zeroext %11, i16 noundef zeroext %12, i16 noundef zeroext %13)
  %15 = zext i16 %14 to i32
  switch i32 %15, label %30 [
    i32 0, label %16
    i32 1, label %18
    i32 2, label %20
    i32 3, label %22
    i32 4, label %24
    i32 5, label %26
    i32 6, label %28
  ]

16:                                               ; preds = %2
  %17 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %32

18:                                               ; preds = %2
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %32

20:                                               ; preds = %2
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  br label %32

22:                                               ; preds = %2
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  br label %32

24:                                               ; preds = %2
  %25 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  br label %32

26:                                               ; preds = %2
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  br label %32

28:                                               ; preds = %2
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  br label %32

30:                                               ; preds = %2
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  br label %32

32:                                               ; preds = %30, %28, %26, %24, %22, %20, %18, %16
  call void @llvm.lifetime.end.p0(i64 2, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 2, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 2, ptr %6) #3
  ret i32 0
}

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

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; 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 = { "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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"short", !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"

@.str = external hidden unnamed_addr constant [26 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [26 x i8], align 1
@switch.table.main = private unnamed_addr constant [7 x ptr] [ptr @.str.2, ptr @.str.3, ptr @.str.4, ptr @.str.5, ptr @.str.6, ptr @.str.7, ptr @.str.8], align 8

; Function Attrs: nounwind uwtable
declare dso_local zeroext i16 @calc_dow(i16 noundef zeroext, i16 noundef zeroext, i16 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = alloca i16, align 2
  %4 = alloca i16, align 2
  %5 = alloca i16, align 2
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %4) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %5) #3
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3, ptr noundef nonnull %4, ptr noundef nonnull %5)
  %8 = load i16, ptr %3, align 2, !tbaa !5
  %9 = load i16, ptr %4, align 2, !tbaa !5
  %10 = load i16, ptr %5, align 2, !tbaa !5
  %11 = call zeroext i16 @calc_dow(i16 noundef zeroext %8, i16 noundef zeroext %9, i16 noundef zeroext %10)
  %12 = icmp ult i16 %11, 7
  br i1 %12, label %switch.lookup, label %14

switch.lookup:                                    ; preds = %2
  %13 = zext nneg i16 %11 to i64
  %switch.gep = getelementptr inbounds [7 x ptr], ptr @switch.table.main, i64 0, i64 %13
  %switch.load = load ptr, ptr %switch.gep, align 8
  br label %14

14:                                               ; preds = %2, %switch.lookup
  %.str.9.sink = phi ptr [ %switch.load, %switch.lookup ], [ @.str.9, %2 ]
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.9.sink)
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %3) #3
  ret i32 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: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress 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 = { 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 = { 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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass