; LLVM IR from ippeb/ACM-ICPC :: data_structure/binary_indexed_tree/2d_binary_indexed_tree.ll (Z4readii)

; 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"

@tree = external dso_local global [1025 x [1025 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 noundef i32 @_Z4readii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = add nsw i32 %7, 1
  store i32 %8, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  store i32 %10, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %35, %2
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = icmp sge i32 %12, 1
  br i1 %13, label %14, label %42

14:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %15 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %15, ptr %6, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %19, %14
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = icmp sge i32 %17, 1
  br i1 %18, label %19, label %35

19:                                               ; preds = %16
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [1025 x [1025 x i32]], ptr @tree, i64 0, i64 %21
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [1025 x i32], ptr %22, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = add nsw i32 %27, %26
  store i32 %28, ptr %5, align 4, !tbaa !5
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = load i32, ptr %6, align 4, !tbaa !5
  %31 = sub nsw i32 0, %30
  %32 = and i32 %29, %31
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = sub nsw i32 %33, %32
  store i32 %34, ptr %6, align 4, !tbaa !5
  br label %16, !llvm.loop !9

35:                                               ; preds = %16
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = sub nsw i32 0, %37
  %39 = and i32 %36, %38
  %40 = load i32, ptr %3, align 4, !tbaa !5
  %41 = sub nsw i32 %40, %39
  store i32 %41, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %11, !llvm.loop !11

42:                                               ; preds = %11
  %43 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %43
}

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"}
!11 = distinct !{!11, !10}


; 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"

@tree = external dso_local local_unnamed_addr global [1025 x [1025 x i32]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z4readii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = add nsw i32 %1, 1
  %4 = or i32 %0, %1
  %or.cond = icmp sgt i32 %4, -1
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge22

.preheader.us.preheader:                          ; preds = %2
  %5 = add nuw nsw i32 %0, 1
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %.01521.us = phi i32 [ %11, %._crit_edge.us ], [ 0, %.preheader.us.preheader ]
  %.01620.us = phi i32 [ %14, %._crit_edge.us ], [ %5, %.preheader.us.preheader ]
  %6 = zext nneg i32 %.01620.us to i64
  br label %7

7:                                                ; preds = %.preheader.us, %7
  %.019.us = phi i32 [ %3, %.preheader.us ], [ %12, %7 ]
  %.118.us = phi i32 [ %.01521.us, %.preheader.us ], [ %11, %7 ]
  %8 = zext nneg i32 %.019.us to i64
  %9 = getelementptr inbounds [1025 x [1025 x i32]], ptr @tree, i64 0, i64 %6, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = add nsw i32 %10, %.118.us
  %.not17.us = add nsw i32 %.019.us, -1
  %12 = and i32 %.not17.us, %.019.us
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %7, label %._crit_edge.us, !llvm.loop !9

._crit_edge.us:                                   ; preds = %7
  %.not.us = add nsw i32 %.01620.us, -1
  %14 = and i32 %.not.us, %.01620.us
  %15 = icmp sgt i32 %14, 0
  br i1 %15, label %.preheader.us, label %._crit_edge22, !llvm.loop !11

._crit_edge22:                                    ; preds = %._crit_edge.us, %2
  %.015.lcssa = phi i32 [ 0, %2 ], [ %11, %._crit_edge.us ]
  ret i32 %.015.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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"}
!11 = distinct !{!11, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass