; LLVM IR from tyalie/Sudoku-Generator-CPP :: src/Generator/GenSudoku.ll (ZN9GenSudoku8moveNextEv)

; 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"

%class.Sudoku = type { [81 x i8], i8 }
%class.GenSudoku = type { %class.Sudoku, i64 }

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN9GenSudoku8moveNextEv(ptr noundef nonnull align 8 dereferenceable(96) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  br label %4

4:                                                ; preds = %17, %1
  %5 = getelementptr inbounds %class.Sudoku, ptr %3, i32 0, i32 0
  %6 = getelementptr inbounds %class.GenSudoku, ptr %3, i32 0, i32 1
  %7 = load i64, ptr %6, align 8, !tbaa !9
  %8 = getelementptr inbounds [81 x i8], ptr %5, i64 0, i64 %7
  %9 = load i8, ptr %8, align 1, !tbaa !14
  %10 = sext i8 %9 to i32
  %11 = icmp ne i32 %10, 0
  br i1 %11, label %12, label %15

12:                                               ; preds = %4
  %13 = call noundef zeroext i1 @_ZN9GenSudoku11isIndexLastEv(ptr noundef nonnull align 8 dereferenceable(96) %3)
  %14 = xor i1 %13, true
  br label %15

15:                                               ; preds = %12, %4
  %16 = phi i1 [ false, %4 ], [ %14, %12 ]
  br i1 %16, label %17, label %21

17:                                               ; preds = %15
  %18 = getelementptr inbounds %class.GenSudoku, ptr %3, i32 0, i32 1
  %19 = load i64, ptr %18, align 8, !tbaa !9
  %20 = add i64 %19, 1
  store i64 %20, ptr %18, align 8, !tbaa !9
  br label %4, !llvm.loop !15

21:                                               ; preds = %15
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9GenSudoku11isIndexLastEv(ptr noundef nonnull align 8 dereferenceable(96)) #1 align 2

attributes #0 = { 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 #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" }

!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 = !{!10, !13, i64 88}
!10 = !{!"_ZTS9GenSudoku", !11, i64 0, !13, i64 88}
!11 = !{!"_ZTS6Sudoku", !7, i64 0, !12, i64 81}
!12 = !{!"bool", !7, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = !{!7, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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
define dso_local void @_ZN9GenSudoku8moveNextEv(ptr noundef nonnull align 8 dereferenceable(96) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 88
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds [81 x i8], ptr %0, i64 0, i64 %3
  %5 = load i8, ptr %4, align 1, !tbaa !12
  %.not1 = icmp eq i8 %5, 0
  br i1 %.not1, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %7
  %6 = tail call noundef zeroext i1 @_ZN9GenSudoku11isIndexLastEv(ptr noundef nonnull align 8 dereferenceable(96) %0)
  br i1 %6, label %.critedge, label %7

7:                                                ; preds = %.lr.ph
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = add i64 %8, 1
  store i64 %9, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds [81 x i8], ptr %0, i64 0, i64 %9
  %11 = load i8, ptr %10, align 1, !tbaa !12
  %.not = icmp eq i8 %11, 0
  br i1 %.not, label %.critedge, label %.lr.ph, !llvm.loop !13

.critedge:                                        ; preds = %.lr.ph, %7, %1
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9GenSudoku11isIndexLastEv(ptr noundef nonnull align 8 dereferenceable(96)) local_unnamed_addr #0 align 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" }

!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, !11, i64 88}
!6 = !{!"_ZTS9GenSudoku", !7, i64 0, !11, i64 88}
!7 = !{!"_ZTS6Sudoku", !8, i64 0, !10, i64 81}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"bool", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!8, !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass