; LLVM IR from kazunetakahashi/atcoder :: 201510_201609/1121_ABC031/D2.ll (Z3dfsi)

; 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"

@K = external dso_local global i32, align 4
@moji = external dso_local global [9 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z5solvev() #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 uwtable
define dso_local void @_Z3dfsi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = load i32, ptr @K, align 4, !tbaa !5
  %6 = icmp eq i32 %4, %5
  br i1 %6, label %7, label %9

7:                                                ; preds = %1
  %8 = call noundef zeroext i1 @_Z5solvev()
  br label %25

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %21, %9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp sle i32 %11, 3
  br i1 %12, label %14, label %13

13:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %24

14:                                               ; preds = %10
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [9 x i32], ptr @moji, i64 0, i64 %17
  store i32 %15, ptr %18, align 4, !tbaa !5
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  call void @_Z3dfsi(i32 noundef %20)
  br label %21

21:                                               ; preds = %14
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %3, align 4, !tbaa !5
  br label %10, !llvm.loop !9

24:                                               ; preds = %13
  br label %25

25:                                               ; preds = %24, %7
  ret void
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@K = external dso_local local_unnamed_addr global i32, align 4
@moji = external dso_local local_unnamed_addr global [9 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z5solvev() local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsi(i32 noundef %0) local_unnamed_addr #0 {
  br label %tailrecurse

tailrecurse:                                      ; preds = %.preheader, %1
  %.tr = phi i32 [ %0, %1 ], [ %6, %.preheader ]
  %2 = load i32, ptr @K, align 4, !tbaa !5
  %3 = icmp eq i32 %2, %.tr
  br i1 %3, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %tailrecurse
  %4 = sext i32 %.tr to i64
  %5 = getelementptr inbounds [9 x i32], ptr @moji, i64 0, i64 %4
  %6 = add nsw i32 %.tr, 1
  store i32 1, ptr %5, align 4, !tbaa !5
  tail call void @_Z3dfsi(i32 noundef %6)
  store i32 2, ptr %5, align 4, !tbaa !5
  tail call void @_Z3dfsi(i32 noundef %6)
  store i32 3, ptr %5, align 4, !tbaa !5
  br label %tailrecurse

.loopexit:                                        ; preds = %tailrecurse
  %7 = tail call noundef zeroext i1 @_Z5solvev()
  ret void
}

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" }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyPass,SROAPass,SimplifyCFGPass,TailCallElimPass