; LLVM IR from tangjz/acm-icpc :: codechef/SNCKEL19 (SFXPAL)

; 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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@p = external dso_local global i32, align 4
@f = external dso_local global [1001 x i32], align 16
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m, ptr noundef @p)
  %4 = load i32, ptr @m, align 4, !tbaa !5
  store i32 %4, ptr getelementptr inbounds ([1001 x i32], ptr @f, i64 0, i64 1), align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 2, ptr %2, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %46, %0
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %8 = icmp sle i32 %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %49

10:                                               ; preds = %5
  %11 = load i32, ptr @m, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = sub nsw i32 %13, 1
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = mul nsw i64 %12, %18
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  %22 = ashr i32 %21, 1
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = sub nsw i64 %19, %26
  %28 = load i32, ptr @p, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = srem i64 %27, %29
  %31 = trunc i64 %30 to i32
  %32 = load i32, ptr %2, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %33
  store i32 %31, ptr %34, align 4, !tbaa !5
  %35 = icmp slt i32 %31, 0
  br i1 %35, label %36, label %44

36:                                               ; preds = %10
  %37 = load i32, ptr @p, align 4, !tbaa !5
  %38 = load i32, ptr %2, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = add nsw i32 %41, %37
  store i32 %42, ptr %40, align 4, !tbaa !5
  %43 = icmp ne i32 %42, 0
  br label %44

44:                                               ; preds = %36, %10
  %45 = phi i1 [ false, %10 ], [ %43, %36 ]
  br label %46

46:                                               ; preds = %44
  %47 = load i32, ptr %2, align 4, !tbaa !5
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %2, align 4, !tbaa !5
  br label %5, !llvm.loop !9

49:                                               ; preds = %9
  %50 = load i32, ptr @n, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %51
  %53 = load i32, ptr %52, align 4, !tbaa !5
  %54 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %53)
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

declare i32 @printf(ptr noundef, ...) #1

attributes #0 = { mustprogress norecurse 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 = { "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 = { nocallback nofree nosync 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 = !{!"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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@p = external dso_local global i32, align 4
@f = external dso_local local_unnamed_addr global [1001 x i32], align 16
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m, ptr noundef nonnull @p)
  %2 = load i32, ptr @m, align 4, !tbaa !5
  store i32 %2, ptr getelementptr inbounds (i8, ptr @f, i64 4), align 4, !tbaa !5
  %3 = load i32, ptr @n, align 4, !tbaa !5
  %.not8 = icmp slt i32 %3, 2
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0
  %4 = sext i32 %2 to i64
  %5 = load i32, ptr @p, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = add nuw i32 %3, 1
  %wide.trip.count = zext i32 %7 to i64
  br label %12

._crit_edge:                                      ; preds = %12, %0
  %8 = sext i32 %3 to i64
  %9 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %10)
  ret i32 0

12:                                               ; preds = %.lr.ph, %12
  %13 = phi i32 [ %2, %.lr.ph ], [ %spec.select, %12 ]
  %indvars.iv = phi i64 [ 2, %.lr.ph ], [ %indvars.iv.next, %12 ]
  %14 = sext i32 %13 to i64
  %15 = mul nsw i64 %14, %4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = lshr i64 %indvars.iv.next, 1
  %17 = and i64 %16, 2147483647
  %18 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = sub nsw i64 %15, %20
  %22 = srem i64 %21, %6
  %23 = trunc nsw i64 %22 to i32
  %24 = getelementptr inbounds [1001 x i32], ptr @f, i64 0, i64 %indvars.iv
  %25 = icmp slt i64 %22, 0
  %26 = select i1 %25, i32 %5, i32 0
  %spec.select = add nsw i32 %26, %23
  store i32 %spec.select, ptr %24, align 4, !tbaa !5
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %12, !llvm.loop !9
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { mustprogress nofree norecurse 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 = { nofree nounwind "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: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass