; LLVM IR from mbrenman/TetrisPlayground :: game/Tetris.ll (ZN6Tetris10clearLinesEv)

; 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.Tetris = type { [10 x [20 x i32]], i32, i8, i8, ptr, ptr }

; 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 uwtable
define dso_local void @_ZN6Tetris10clearLinesEv(ptr noundef nonnull align 8 dereferenceable(824) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 19, ptr %3, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %20, %1
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = icmp sge i32 %6, 0
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %23

9:                                                ; preds = %5
  %10 = load i32, ptr %3, align 4, !tbaa !9
  %11 = call noundef zeroext i1 @_ZN6Tetris10lineIsFullEi(ptr noundef nonnull align 8 dereferenceable(824) %4, i32 noundef %10)
  br i1 %11, label %12, label %19

12:                                               ; preds = %9
  %13 = load i32, ptr %3, align 4, !tbaa !9
  call void @_ZN6Tetris9clearLineEi(ptr noundef nonnull align 8 dereferenceable(824) %4, i32 noundef %13)
  %14 = getelementptr inbounds %class.Tetris, ptr %4, i32 0, i32 1
  %15 = load i32, ptr %14, align 8, !tbaa !11
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %14, align 8, !tbaa !11
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %3, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %12, %9
  br label %20

20:                                               ; preds = %19
  %21 = load i32, ptr %3, align 4, !tbaa !9
  %22 = add nsw i32 %21, -1
  store i32 %22, ptr %3, align 4, !tbaa !9
  br label %5, !llvm.loop !14

23:                                               ; preds = %8
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN6Tetris10lineIsFullEi(ptr noundef nonnull align 8 dereferenceable(824), i32 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6Tetris9clearLineEi(ptr noundef nonnull align 8 dereferenceable(824), i32 noundef) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 800}
!12 = !{!"_ZTS6Tetris", !7, i64 0, !10, i64 800, !13, i64 804, !13, i64 805, !6, i64 808, !6, i64 816}
!13 = !{!"bool", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 @_ZN6Tetris10clearLinesEv(ptr noundef nonnull align 8 dereferenceable(824) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 800
  br label %4

3:                                                ; preds = %10
  ret void

4:                                                ; preds = %1, %10
  %.05 = phi i32 [ 19, %1 ], [ %11, %10 ]
  %5 = tail call noundef zeroext i1 @_ZN6Tetris10lineIsFullEi(ptr noundef nonnull align 8 dereferenceable(824) %0, i32 noundef %.05)
  br i1 %5, label %6, label %10

6:                                                ; preds = %4
  tail call void @_ZN6Tetris9clearLineEi(ptr noundef nonnull align 8 dereferenceable(824) %0, i32 noundef %.05)
  %7 = load i32, ptr %2, align 8, !tbaa !5
  %8 = add nsw i32 %7, 1
  store i32 %8, ptr %2, align 8, !tbaa !5
  %9 = add nuw nsw i32 %.05, 1
  br label %10

10:                                               ; preds = %4, %6
  %.1 = phi i32 [ %9, %6 ], [ %.05, %4 ]
  %11 = add nsw i32 %.1, -1
  %12 = icmp sgt i32 %.1, 0
  br i1 %12, label %4, label %3, !llvm.loop !12
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN6Tetris10lineIsFullEi(ptr noundef nonnull align 8 dereferenceable(824), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6Tetris9clearLineEi(ptr noundef nonnull align 8 dereferenceable(824), i32 noundef) 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, !9, i64 800}
!6 = !{!"_ZTS6Tetris", !7, i64 0, !9, i64 800, !10, i64 804, !10, i64 805, !11, i64 808, !11, i64 816}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{!"any pointer", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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