; LLVM IR from tangjz/acm-icpc :: Summer_Training/2016-07-17/D - Trouble - lizy.ll (Z4findx)

; 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"

@s = external dso_local global [4000006 x i64], align 16
@u = external dso_local global [4000006 x i8], 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 zeroext i1 @_Z4findx(i64 noundef %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = srem i64 %6, 2000003
  %8 = add nsw i64 %7, 2000003
  %9 = srem i64 %8, 2000003
  %10 = trunc i64 %9 to i32
  store i32 %10, ptr %4, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %27, %1
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [4000006 x i8], ptr @u, i64 0, i64 %13
  %15 = load i8, ptr %14, align 1, !tbaa !11, !range !13, !noundef !14
  %16 = trunc i8 %15 to i1
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  store i32 2, ptr %5, align 4
  br label %30

18:                                               ; preds = %11
  %19 = load i32, ptr %4, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [4000006 x i64], ptr @s, i64 0, i64 %20
  %22 = load i64, ptr %21, align 8, !tbaa !5
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = icmp eq i64 %22, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %18
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %30

26:                                               ; preds = %18
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %4, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !9
  br label %11, !llvm.loop !15

30:                                               ; preds = %25, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %31 = load i32, ptr %5, align 4
  switch i32 %31, label %35 [
    i32 2, label %32
    i32 1, label %33
  ]

32:                                               ; preds = %30
  store i1 false, ptr %2, align 1
  br label %33

33:                                               ; preds = %32, %30
  %34 = load i1, ptr %2, align 1
  ret i1 %34

35:                                               ; preds = %30
  unreachable
}

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = distinct !{!15, !16}
!16 = !{!"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"

@s = external dso_local local_unnamed_addr global [4000006 x i64], align 16
@u = external dso_local local_unnamed_addr global [4000006 x i8], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef zeroext i1 @_Z4findx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = srem i64 %0, 2000003
  %3 = add nsw i64 %2, 2000003
  %.cmp = icmp ugt i64 %2, -2000004
  %4 = select i1 %.cmp, i64 %3, i64 %2
  %5 = getelementptr inbounds [4000006 x i8], ptr @u, i64 0, i64 %4
  %6 = load i8, ptr %5, align 1, !tbaa !5, !range !9, !noundef !10
  %7 = trunc nuw i8 %6 to i1
  br i1 %7, label %.lr.ph, label %._crit_edge

8:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = getelementptr inbounds [4000006 x i8], ptr @u, i64 0, i64 %indvars.iv.next
  %10 = load i8, ptr %9, align 1, !tbaa !5, !range !9, !noundef !10
  %11 = trunc nuw i8 %10 to i1
  br i1 %11, label %.lr.ph, label %._crit_edge, !llvm.loop !11

.lr.ph:                                           ; preds = %1, %8
  %indvars.iv = phi i64 [ %indvars.iv.next, %8 ], [ %4, %1 ]
  %12 = getelementptr inbounds [4000006 x i64], ptr @s, i64 0, i64 %indvars.iv
  %13 = load i64, ptr %12, align 8, !tbaa !13
  %14 = icmp eq i64 %13, %0
  br i1 %14, label %._crit_edge, label %8

._crit_edge:                                      ; preds = %8, %.lr.ph, %1
  %.lcssa = phi i1 [ false, %1 ], [ %14, %.lr.ph ], [ %14, %8 ]
  ret i1 %.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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{i8 0, i8 2}
!10 = !{}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"long long", !7, i64 0}


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