; LLVM IR from tangjz/acm-icpc :: hdu/6079.ll (Z6count1iii)

; 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"

@a = external dso_local global [100001 x i32], align 16
@pos = external dso_local global [100001 x i32], align 16
@p = external dso_local global [317 x [100001 x i32]], align 16
@cnt = external dso_local global [319 x i32], align 16

; 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
define dso_local void @_Z6count1iii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %10, ptr %7, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %36, %3
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = icmp sle i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %39

16:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [317 x [100001 x i32]], ptr @p, i64 0, i64 %18
  %20 = load i32, ptr %7, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [100001 x i32], ptr @a, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [100001 x i32], ptr %19, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  store i32 %26, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [100001 x i32], ptr @pos, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  store i32 %30, ptr %9, align 4, !tbaa !5
  %31 = load i32, ptr %9, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [319 x i32], ptr @cnt, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %33, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %36

36:                                               ; preds = %16
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %7, align 4, !tbaa !5
  br label %11, !llvm.loop !9

39:                                               ; preds = %15
  ret void
}

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 = { 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"

@a = external dso_local local_unnamed_addr global [100001 x i32], align 16
@pos = external dso_local local_unnamed_addr global [100001 x i32], align 16
@p = external dso_local local_unnamed_addr global [317 x [100001 x i32]], align 16
@cnt = external dso_local local_unnamed_addr global [319 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z6count1iii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not8 = icmp sgt i32 %0, %1
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = sext i32 %2 to i64
  %5 = sext i32 %0 to i64
  %6 = add i32 %1, 1
  %7 = sub i32 %6, %0
  %xtraiter = and i32 %7, 1
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.prol.loopexit, label %.prol.loopexit.unr-lcssa

.prol.loopexit.unr-lcssa:                         ; preds = %.lr.ph
  %8 = getelementptr inbounds [100001 x i32], ptr @a, i64 0, i64 %5
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [317 x [100001 x i32]], ptr @p, i64 0, i64 %4, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100001 x i32], ptr @pos, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [319 x i32], ptr @cnt, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %17, align 4, !tbaa !5
  %indvars.iv.next.prol = add nsw i64 %5, 1
  br label %.prol.loopexit

.prol.loopexit:                                   ; preds = %.prol.loopexit.unr-lcssa, %.lr.ph
  %indvars.iv.unr = phi i64 [ %5, %.lr.ph ], [ %indvars.iv.next.prol, %.prol.loopexit.unr-lcssa ]
  %20 = icmp eq i32 %1, %0
  br i1 %20, label %._crit_edge, label %.lr.ph.new

._crit_edge:                                      ; preds = %.prol.loopexit, %.lr.ph.new, %3
  ret void

.lr.ph.new:                                       ; preds = %.prol.loopexit, %.lr.ph.new
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph.new ], [ %indvars.iv.unr, %.prol.loopexit ]
  %21 = getelementptr inbounds [100001 x i32], ptr @a, i64 0, i64 %indvars.iv
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [317 x [100001 x i32]], ptr @p, i64 0, i64 %4, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [100001 x i32], ptr @pos, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [319 x i32], ptr @cnt, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %30, align 4, !tbaa !5
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %33 = getelementptr inbounds [100001 x i32], ptr @a, i64 0, i64 %indvars.iv.next
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [317 x [100001 x i32]], ptr @p, i64 0, i64 %4, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [100001 x i32], ptr @pos, i64 0, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [319 x i32], ptr @cnt, i64 0, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %42, align 4, !tbaa !5
  %indvars.iv.next.1 = add nsw i64 %indvars.iv, 2
  %lftr.wideiv.1 = trunc i64 %indvars.iv.next.1 to i32
  %exitcond.not.1 = icmp eq i32 %6, %lftr.wideiv.1
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph.new, !llvm.loop !9
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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