; LLVM IR from lzyrapx/Competitive-Programming :: ACdream/1075（广义斐波那契数列求循环节）.ll (Z5power6matrixx)

; 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"

%struct.matrix = type { [2 x [2 x i64]] }

@I = external dso_local global %struct.matrix, align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z5multi6matrixS_(ptr dead_on_unwind noalias writable sret(%struct.matrix) align 8, ptr noundef byval(%struct.matrix) align 8, ptr noundef byval(%struct.matrix) align 8) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5power6matrixx(ptr dead_on_unwind noalias writable sret(%struct.matrix) align 8 %0, ptr noundef byval(%struct.matrix) align 8 %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca %struct.matrix, align 8
  %6 = alloca %struct.matrix, align 8
  %7 = alloca %struct.matrix, align 8
  %8 = alloca %struct.matrix, align 8
  %9 = alloca %struct.matrix, align 8
  %10 = alloca %struct.matrix, align 8
  %11 = alloca %struct.matrix, align 8
  store i64 %2, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %0, ptr align 8 @I, i64 32, i1 false), !tbaa.struct !9
  call void @llvm.lifetime.start.p0(i64 32, ptr %5) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %5, ptr align 8 %1, i64 32, i1 false), !tbaa.struct !9
  br label %12

12:                                               ; preds = %22, %3
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = icmp ne i64 %13, 0
  br i1 %14, label %15, label %25

15:                                               ; preds = %12
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = and i64 %16, 1
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %19, label %22

19:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 32, ptr %6) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %7, ptr align 8 %0, i64 32, i1 false), !tbaa.struct !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 8 %5, i64 32, i1 false), !tbaa.struct !9
  call void @_Z5multi6matrixS_(ptr dead_on_unwind writable sret(%struct.matrix) align 8 %6, ptr noundef byval(%struct.matrix) align 8 %7, ptr noundef byval(%struct.matrix) align 8 %8)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %0, ptr align 8 %6, i64 32, i1 false), !tbaa.struct !9
  call void @llvm.lifetime.end.p0(i64 32, ptr %6) #3
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = add nsw i64 %20, -1
  store i64 %21, ptr %4, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %19, %15
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = ashr i64 %23, 1
  store i64 %24, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %9) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %10, ptr align 8 %5, i64 32, i1 false), !tbaa.struct !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %11, ptr align 8 %5, i64 32, i1 false), !tbaa.struct !9
  call void @_Z5multi6matrixS_(ptr dead_on_unwind writable sret(%struct.matrix) align 8 %9, ptr noundef byval(%struct.matrix) align 8 %10, ptr noundef byval(%struct.matrix) align 8 %11)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %5, ptr align 8 %9, i64 32, i1 false), !tbaa.struct !9
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #3
  br label %12, !llvm.loop !11

25:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 32, ptr %5) #3
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{i64 0, i64 32, !10}
!10 = !{!7, !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"

%struct.matrix = type { [2 x [2 x i64]] }

@I = external dso_local local_unnamed_addr global %struct.matrix, align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z5multi6matrixS_(ptr dead_on_unwind noalias writable sret(%struct.matrix) align 8, ptr noundef byval(%struct.matrix) align 8, ptr noundef byval(%struct.matrix) align 8) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5power6matrixx(ptr dead_on_unwind noalias nocapture writable sret(%struct.matrix) align 8 %0, ptr nocapture noundef readonly byval(%struct.matrix) align 8 %1, i64 noundef %2) local_unnamed_addr #0 {
  %.sroa.0 = alloca [2 x [2 x i64]], align 8
  %4 = alloca %struct.matrix, align 8
  %5 = alloca %struct.matrix, align 8
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) @I, i64 32, i1 false), !tbaa.struct !5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %.sroa.0)
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %.sroa.0, ptr noundef nonnull align 8 dereferenceable(32) %1, i64 32, i1 false), !tbaa.struct !5
  %.not5 = icmp eq i64 %2, 0
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %9
  %.06 = phi i64 [ %10, %9 ], [ %2, %3 ]
  %6 = and i64 %.06, 1
  %.not4 = icmp eq i64 %6, 0
  br i1 %.not4, label %9, label %7

7:                                                ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %4) #3
  call void @_Z5multi6matrixS_(ptr dead_on_unwind nonnull writable sret(%struct.matrix) align 8 %4, ptr noundef nonnull byval(%struct.matrix) align 8 %0, ptr noundef nonnull byval(%struct.matrix) align 8 %.sroa.0)
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %4, i64 32, i1 false), !tbaa.struct !5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #3
  %8 = add nsw i64 %.06, -1
  br label %9

9:                                                ; preds = %7, %.lr.ph
  %.1 = phi i64 [ %8, %7 ], [ %.06, %.lr.ph ]
  %10 = ashr i64 %.1, 1
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #3
  call void @_Z5multi6matrixS_(ptr dead_on_unwind nonnull writable sret(%struct.matrix) align 8 %5, ptr noundef nonnull byval(%struct.matrix) align 8 %.sroa.0, ptr noundef nonnull byval(%struct.matrix) align 8 %.sroa.0)
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %.sroa.0, ptr noundef nonnull align 8 dereferenceable(32) %5, i64 32, i1 false), !tbaa.struct !5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  %.not = icmp ult i64 %.1, 2
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %9, %3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %.sroa.0)
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{i64 0, i64 32, !6}
!6 = !{!7, !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,DSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass