; LLVM IR from tangjz/acm-icpc :: 51nod/1685.ll (Z3sumii)

; 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"

@bit = external dso_local global [2 x [100010 x i32]], align 16
@tim = external dso_local global [2 x [100010 x i32]], align 16
@clk = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3sumii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, 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 %6

6:                                                ; preds = %30, %2
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %9, label %37

9:                                                ; preds = %6
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [2 x [100010 x i32]], ptr @tim, i64 0, i64 %11
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [100010 x i32], ptr %12, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = load i32, ptr @clk, align 4, !tbaa !5
  %18 = icmp eq i32 %16, %17
  br i1 %18, label %19, label %29

19:                                               ; preds = %9
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [2 x [100010 x i32]], ptr @bit, i64 0, i64 %21
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [100010 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
  br label %29

29:                                               ; preds = %19, %9
  br label %30

30:                                               ; preds = %29
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = sub nsw i32 0, %32
  %34 = and i32 %31, %33
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = sub nsw i32 %35, %34
  store i32 %36, ptr %4, align 4, !tbaa !5
  br label %6, !llvm.loop !9

37:                                               ; preds = %6
  %38 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %38
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"

@bit = external dso_local local_unnamed_addr global [2 x [100010 x i32]], align 16
@tim = external dso_local local_unnamed_addr global [2 x [100010 x i32]], align 16
@clk = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z3sumii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %4 = sext i32 %0 to i64
  %5 = load i32, ptr @clk, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %.lr.ph, %15
  %.012 = phi i32 [ 0, %.lr.ph ], [ %.1, %15 ]
  %.01011 = phi i32 [ %1, %.lr.ph ], [ %16, %15 ]
  %7 = zext nneg i32 %.01011 to i64
  %8 = getelementptr inbounds [2 x [100010 x i32]], ptr @tim, i64 0, i64 %4, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = icmp eq i32 %9, %5
  br i1 %10, label %11, label %15

11:                                               ; preds = %6
  %12 = getelementptr inbounds [2 x [100010 x i32]], ptr @bit, i64 0, i64 %4, i64 %7
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = add nsw i32 %13, %.012
  br label %15

15:                                               ; preds = %6, %11
  %.1 = phi i32 [ %14, %11 ], [ %.012, %6 ]
  %.not = add nsw i32 %.01011, -1
  %16 = and i32 %.not, %.01011
  %.not13 = icmp eq i32 %16, 0
  br i1 %.not13, label %._crit_edge, label %6, !llvm.loop !9

._crit_edge:                                      ; preds = %15, %2
  %.0.lcssa = phi i32 [ 0, %2 ], [ %.1, %15 ]
  ret i32 %.0.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"}


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