; LLVM IR from tangjz/acm-icpc :: uvalive/5871.ll (Z3addii)

; 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"

@t = external dso_local global i32, align 4
@bit = external dso_local global [1000002 x i32], align 16
@vis = external dso_local global [1000002 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3addii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %32, %2
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %8, label %39

8:                                                ; preds = %5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [1000002 x i32], ptr @vis, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = load i32, ptr @t, align 4, !tbaa !5
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %22

15:                                               ; preds = %8
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [1000002 x i32], ptr @bit, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = add nsw i32 %20, %16
  store i32 %21, ptr %19, align 4, !tbaa !5
  br label %31

22:                                               ; preds = %8
  %23 = load i32, ptr @t, align 4, !tbaa !5
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [1000002 x i32], ptr @vis, i64 0, i64 %25
  store i32 %23, ptr %26, align 4, !tbaa !5
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [1000002 x i32], ptr @bit, i64 0, i64 %29
  store i32 %27, ptr %30, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %22, %15
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = sub nsw i32 0, %34
  %36 = and i32 %33, %35
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = sub nsw i32 %37, %36
  store i32 %38, ptr %3, align 4, !tbaa !5
  br label %5, !llvm.loop !9

39:                                               ; preds = %5
  ret void
}

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" }

!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"

@t = external dso_local local_unnamed_addr global i32, align 4
@bit = external dso_local local_unnamed_addr global [1000002 x i32], align 16
@vis = external dso_local local_unnamed_addr global [1000002 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z3addii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %4 = load i32, ptr @t, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %.lr.ph, %16
  %.011 = phi i32 [ %0, %.lr.ph ], [ %17, %16 ]
  %6 = zext nneg i32 %.011 to i64
  %7 = getelementptr inbounds [1000002 x i32], ptr @vis, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = icmp eq i32 %8, %4
  br i1 %9, label %10, label %14

10:                                               ; preds = %5
  %11 = getelementptr inbounds [1000002 x i32], ptr @bit, i64 0, i64 %6
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = add nsw i32 %12, %1
  store i32 %13, ptr %11, align 4, !tbaa !5
  br label %16

14:                                               ; preds = %5
  store i32 %4, ptr %7, align 4, !tbaa !5
  %15 = getelementptr inbounds [1000002 x i32], ptr @bit, i64 0, i64 %6
  store i32 %1, ptr %15, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %10, %14
  %.not = add nsw i32 %.011, -1
  %17 = and i32 %.not, %.011
  %.not12 = icmp eq i32 %17, 0
  br i1 %.not12, label %._crit_edge, label %5, !llvm.loop !9

._crit_edge:                                      ; preds = %16, %2
  ret void
}

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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass