; LLVM IR from tangjz/acm-icpc :: hdu/6102.ll (Z3dfsii)

; 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"

@st = external dso_local global i32, align 4
@tim = external dso_local global [100001 x i32], align 16
@cnt = external dso_local global [100001 x i32], align 16
@etot = external dso_local global i32, align 4
@e = external dso_local global [7 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3dfsii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = load i32, ptr @etot, align 4, !tbaa !5
  %8 = icmp eq i32 %6, %7
  br i1 %8, label %9, label %31

9:                                                ; preds = %2
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [100001 x i32], ptr @tim, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = load i32, ptr @st, align 4, !tbaa !5
  %15 = icmp ne i32 %13, %14
  br i1 %15, label %16, label %24

16:                                               ; preds = %9
  %17 = load i32, ptr @st, align 4, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100001 x i32], ptr @tim, i64 0, i64 %19
  store i32 %17, ptr %20, align 4, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [100001 x i32], ptr @cnt, i64 0, i64 %22
  store i32 0, ptr %23, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %16, %9
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [100001 x i32], ptr @cnt, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %27, align 4, !tbaa !5
  %30 = sext i32 %28 to i64
  store i64 %30, ptr %3, align 8
  br label %46

31:                                               ; preds = %2
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = call noundef i64 @_Z3dfsii(i32 noundef %33, i32 noundef %34)
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [7 x i32], ptr @e, i64 0, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !5
  %43 = mul nsw i32 %38, %42
  %44 = call noundef i64 @_Z3dfsii(i32 noundef %37, i32 noundef %43)
  %45 = sub nsw i64 %35, %44
  store i64 %45, ptr %3, align 8
  br label %46

46:                                               ; preds = %31, %24
  %47 = load i64, ptr %3, align 8
  ret i64 %47
}

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"}


; 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"

@st = external dso_local local_unnamed_addr global i32, align 4
@tim = external dso_local local_unnamed_addr global [100001 x i32], align 16
@cnt = external dso_local local_unnamed_addr global [100001 x i32], align 16
@etot = external dso_local local_unnamed_addr global i32, align 4
@e = external dso_local local_unnamed_addr global [7 x i32], align 16

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z3dfsii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @etot, align 4, !tbaa !5
  %4 = icmp eq i32 %3, %0
  br i1 %4, label %5, label %15

5:                                                ; preds = %2
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [100001 x i32], ptr @tim, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = load i32, ptr @st, align 4, !tbaa !5
  %.not = icmp eq i32 %8, %9
  br i1 %.not, label %._crit_edge, label %10

._crit_edge:                                      ; preds = %5
  %.phi.trans.insert = getelementptr inbounds [100001 x i32], ptr @cnt, i64 0, i64 %6
  %.pre = load i32, ptr %.phi.trans.insert, align 4, !tbaa !5
  br label %common.ret

10:                                               ; preds = %5
  store i32 %9, ptr %7, align 4, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %._crit_edge, %10
  %11 = phi i32 [ %.pre, %._crit_edge ], [ 0, %10 ]
  %12 = getelementptr inbounds [100001 x i32], ptr @cnt, i64 0, i64 %6
  %13 = add nsw i32 %11, 1
  store i32 %13, ptr %12, align 4, !tbaa !5
  %14 = sext i32 %11 to i64
  br label %common.ret13

common.ret13:                                     ; preds = %15, %common.ret
  %common.ret13.op = phi i64 [ %14, %common.ret ], [ %23, %15 ]
  ret i64 %common.ret13.op

15:                                               ; preds = %2
  %16 = add nsw i32 %0, 1
  %17 = tail call noundef i64 @_Z3dfsii(i32 noundef %16, i32 noundef %1)
  %18 = sext i32 %0 to i64
  %19 = getelementptr inbounds [7 x i32], ptr @e, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = mul nsw i32 %20, %1
  %22 = tail call noundef i64 @_Z3dfsii(i32 noundef %16, i32 noundef %21)
  %23 = sub nsw i64 %17, %22
  br label %common.ret13
}

attributes #0 = { mustprogress nofree 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"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass