; LLVM IR from gokcehan/pns :: generators/gridgen-patched (gridgen)

; 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"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; 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
declare dso_local void @err(i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @read_line(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  br label %6

6:                                                ; preds = %57, %2
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %7, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = call i32 @feof(ptr noundef %8) #4
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %6
  call void @err(i64 noundef 5)
  br label %12

12:                                               ; preds = %11, %6
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = call ptr @fgets(ptr noundef %13, i32 noundef 100, ptr noundef %14)
  br label %16

16:                                               ; preds = %38, %12
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load i8, ptr %17, align 1, !tbaa !9
  %19 = sext i8 %18 to i32
  %20 = icmp eq i32 %19, 32
  br i1 %20, label %26, label %21

21:                                               ; preds = %16
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i8, ptr %22, align 1, !tbaa !9
  %24 = sext i8 %23 to i32
  %25 = icmp eq i32 %24, 9
  br i1 %25, label %26, label %36

26:                                               ; preds = %21, %16
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = load i8, ptr %27, align 1, !tbaa !9
  %29 = sext i8 %28 to i32
  %30 = icmp ne i32 %29, 10
  br i1 %30, label %31, label %36

31:                                               ; preds = %26
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = load i8, ptr %32, align 1, !tbaa !9
  %34 = sext i8 %33 to i32
  %35 = icmp ne i32 %34, 0
  br label %36

36:                                               ; preds = %31, %26, %21
  %37 = phi i1 [ false, %26 ], [ false, %21 ], [ %35, %31 ]
  br i1 %37, label %38, label %41

38:                                               ; preds = %36
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = getelementptr inbounds i8, ptr %39, i32 1
  store ptr %40, ptr %5, align 8, !tbaa !5
  br label %16, !llvm.loop !10

41:                                               ; preds = %36
  br label %42

42:                                               ; preds = %41
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = load i8, ptr %43, align 1, !tbaa !9
  %45 = sext i8 %44 to i32
  %46 = icmp eq i32 %45, 35
  br i1 %46, label %57, label %47

47:                                               ; preds = %42
  %48 = load ptr, ptr %5, align 8, !tbaa !5
  %49 = load i8, ptr %48, align 1, !tbaa !9
  %50 = sext i8 %49 to i32
  %51 = icmp eq i32 %50, 10
  br i1 %51, label %57, label %52

52:                                               ; preds = %47
  %53 = load ptr, ptr %5, align 8, !tbaa !5
  %54 = load i8, ptr %53, align 1, !tbaa !9
  %55 = sext i8 %54 to i32
  %56 = icmp eq i32 %55, 0
  br label %57

57:                                               ; preds = %52, %47, %42
  %58 = phi i1 [ true, %47 ], [ true, %42 ], [ %56, %52 ]
  br i1 %58, label %6, label %59, !llvm.loop !12

59:                                               ; preds = %57
  %60 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret ptr %60
}

; Function Attrs: nounwind
declare i32 @feof(ptr noundef) #2

declare ptr @fgets(ptr noundef, i32 noundef, ptr noundef) #3

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

!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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


; 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"

; Function Attrs: nounwind uwtable
declare dso_local void @err(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @read_line(ptr nocapture noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  br label %.backedge

.backedge.loopexit:                               ; preds = %7, %7, %7
  br label %.backedge

.backedge:                                        ; preds = %.backedge.loopexit, %2
  %3 = tail call i32 @feof(ptr noundef %0) #2
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %5, label %4

4:                                                ; preds = %.backedge
  tail call void @err(i64 noundef 5)
  br label %5

5:                                                ; preds = %4, %.backedge
  %6 = tail call ptr @fgets(ptr noundef %1, i32 noundef 100, ptr noundef %0)
  br label %7

7:                                                ; preds = %9, %5
  %.0 = phi ptr [ %1, %5 ], [ %10, %9 ]
  %8 = load i8, ptr %.0, align 1, !tbaa !5
  switch i8 %8, label %11 [
    i8 9, label %9
    i8 32, label %9
    i8 35, label %.backedge.loopexit
    i8 10, label %.backedge.loopexit
    i8 0, label %.backedge.loopexit
  ]

9:                                                ; preds = %7, %7
  %10 = getelementptr inbounds i8, ptr %.0, i64 1
  br label %7, !llvm.loop !8

11:                                               ; preds = %7
  ret ptr %.0
}

; Function Attrs: nofree nounwind
declare noundef i32 @feof(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef ptr @fgets(ptr noundef, i32 noundef, ptr nocapture noundef) local_unnamed_addr #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 = { 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 #2 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass