; LLVM IR from tangjz/acm-icpc :: buaa/oj3rd (1105)

; 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"

@op = external dso_local global [2 x ptr], align 16
@ch = external dso_local global i32, align 4
@flag = external dso_local global i32, align 4
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  br label %2

2:                                                ; preds = %19, %0
  %3 = call i32 @getchar()
  store i32 %3, ptr @ch, align 4, !tbaa !5
  %4 = icmp ne i32 %3, -1
  br i1 %4, label %5, label %20

5:                                                ; preds = %2
  %6 = load i32, ptr @ch, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 34
  br i1 %7, label %8, label %16

8:                                                ; preds = %5
  %9 = load i32, ptr @flag, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [2 x ptr], ptr @op, i64 0, i64 %10
  %12 = load ptr, ptr %11, align 8, !tbaa !9
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, ptr noundef %12)
  %14 = load i32, ptr @flag, align 4, !tbaa !5
  %15 = xor i32 %14, 1
  store i32 %15, ptr @flag, align 4, !tbaa !5
  br label %19

16:                                               ; preds = %5
  %17 = load i32, ptr @ch, align 4, !tbaa !5
  %18 = call i32 @putchar(i32 noundef %17)
  br label %19

19:                                               ; preds = %16, %8
  br label %2, !llvm.loop !11

20:                                               ; preds = %2
  ret i32 0
}

; Function Attrs: inlinehint mustprogress uwtable
declare i32 @getchar() #1

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

; Function Attrs: inlinehint mustprogress uwtable
declare i32 @putchar(i32 noundef) #1

attributes #0 = { mustprogress norecurse 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 = { inlinehint mustprogress 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" }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

@op = external dso_local local_unnamed_addr global [2 x ptr], align 16
@ch = external dso_local local_unnamed_addr global i32, align 4
@flag = external dso_local local_unnamed_addr global i32, align 4
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  br label %1

1:                                                ; preds = %.backedge, %0
  %2 = tail call i32 @getchar()
  store i32 %2, ptr @ch, align 4, !tbaa !5
  switch i32 %2, label %11 [
    i32 -1, label %13
    i32 34, label %3
  ]

3:                                                ; preds = %1
  %4 = load i32, ptr @flag, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = getelementptr inbounds [2 x ptr], ptr @op, i64 0, i64 %5
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, ptr noundef %7)
  %9 = load i32, ptr @flag, align 4, !tbaa !5
  %10 = xor i32 %9, 1
  store i32 %10, ptr @flag, align 4, !tbaa !5
  br label %.backedge

11:                                               ; preds = %1
  %12 = tail call i32 @putchar(i32 noundef %2)
  br label %.backedge

.backedge:                                        ; preds = %11, %3
  br label %1, !llvm.loop !11

13:                                               ; preds = %1
  ret i32 0
}

; Function Attrs: inlinehint mustprogress nofree nounwind uwtable
declare noundef i32 @getchar() local_unnamed_addr #1

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

; Function Attrs: inlinehint mustprogress nofree nounwind uwtable
declare noundef i32 @putchar(i32 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree norecurse 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 = { inlinehint mustprogress 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 #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" }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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