; LLVM IR from ral99/knuckleball :: src (grammar)

; 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: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN7Grammar16is_reserved_wordERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(32)) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_ZN7Grammar13is_identifierERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(32) %0) #2 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %6) #4
  %8 = icmp eq i64 %7, 0
  br i1 %8, label %14, label %9

9:                                                ; preds = %1
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %10, i64 noundef 0) #4
  %12 = load i8, ptr %11, align 1, !tbaa !9
  %13 = call noundef zeroext i1 @_ZN9str_utils8is_alphaEc(i8 noundef signext %12)
  br i1 %13, label %15, label %14

14:                                               ; preds = %9, %1
  store i1 false, ptr %2, align 1
  br label %49

15:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 1, ptr %4, align 4, !tbaa !10
  br label %16

16:                                               ; preds = %40, %15
  %17 = load i32, ptr %4, align 4, !tbaa !10
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %18) #4
  %20 = trunc i64 %19 to i32
  %21 = icmp slt i32 %17, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %16
  store i32 2, ptr %5, align 4
  br label %43

23:                                               ; preds = %16
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !10
  %26 = sext i32 %25 to i64
  %27 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %24, i64 noundef %26) #4
  %28 = load i8, ptr %27, align 1, !tbaa !9
  %29 = call noundef zeroext i1 @_ZN9str_utils15is_alphanumericEc(i8 noundef signext %28)
  br i1 %29, label %39, label %30

30:                                               ; preds = %23
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !10
  %33 = sext i32 %32 to i64
  %34 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %31, i64 noundef %33) #4
  %35 = load i8, ptr %34, align 1, !tbaa !9
  %36 = sext i8 %35 to i32
  %37 = icmp ne i32 %36, 95
  br i1 %37, label %38, label %39

38:                                               ; preds = %30
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %43

39:                                               ; preds = %30, %23
  br label %40

40:                                               ; preds = %39
  %41 = load i32, ptr %4, align 4, !tbaa !10
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %4, align 4, !tbaa !10
  br label %16, !llvm.loop !12

43:                                               ; preds = %38, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  %44 = load i32, ptr %5, align 4
  switch i32 %44, label %51 [
    i32 2, label %45
    i32 1, label %49
  ]

45:                                               ; preds = %43
  %46 = load ptr, ptr %3, align 8, !tbaa !5
  %47 = call noundef zeroext i1 @_ZN7Grammar16is_reserved_wordERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(32) %46)
  %48 = xor i1 %47, true
  store i1 %48, ptr %2, align 1
  br label %49

49:                                               ; preds = %45, %43, %14
  %50 = load i1, ptr %2, align 1
  ret i1 %50

51:                                               ; preds = %43
  unreachable
}

declare noundef zeroext i1 @_ZN9str_utils8is_alphaEc(i8 noundef signext) #3

declare noundef zeroext i1 @_ZN9str_utils15is_alphanumericEc(i8 noundef signext) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { 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 #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++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN7Grammar16is_reserved_wordERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_ZN7Grammar13is_identifierERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(32) %0) local_unnamed_addr #1 {
  %2 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %3 = icmp eq i64 %2, 0
  br i1 %3, label %.loopexit, label %4

4:                                                ; preds = %1
  %5 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0) #3
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = tail call noundef zeroext i1 @_ZN9str_utils8is_alphaEc(i8 noundef signext %6)
  br i1 %7, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %4
  %8 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %9 = trunc i64 %8 to i32
  %10 = icmp sgt i32 %9, 1
  br i1 %10, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader, %17
  %indvars.iv = phi i64 [ %indvars.iv.next, %17 ], [ 1, %.preheader ]
  %11 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv) #3
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %13 = tail call noundef zeroext i1 @_ZN9str_utils15is_alphanumericEc(i8 noundef signext %12)
  br i1 %13, label %17, label %14

14:                                               ; preds = %.lr.ph
  %15 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv) #3
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %.not = icmp eq i8 %16, 95
  br i1 %.not, label %17, label %.loopexit

17:                                               ; preds = %.lr.ph, %14
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %18 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %sext = shl i64 %18, 32
  %19 = ashr exact i64 %sext, 32
  %20 = icmp slt i64 %indvars.iv.next, %19
  br i1 %20, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %17, %.preheader
  %21 = tail call noundef zeroext i1 @_ZN7Grammar16is_reserved_wordERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(32) %0)
  %22 = xor i1 %21, true
  br label %.loopexit

.loopexit:                                        ; preds = %14, %1, %4, %._crit_edge
  %.1 = phi i1 [ %22, %._crit_edge ], [ false, %4 ], [ false, %1 ], [ false, %14 ]
  ret i1 %.1
}

declare noundef zeroext i1 @_ZN9str_utils8is_alphaEc(i8 noundef signext) local_unnamed_addr #2

declare noundef zeroext i1 @_ZN9str_utils15is_alphanumericEc(i8 noundef signext) local_unnamed_addr #2

attributes #0 = { mustprogress 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 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" }
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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass