; LLVM IR from bqi343/cp-notebook :: Contests/USACO Training/Ch 6/6.4 prime3.ll (Z3nozi)

; 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"

@upleft = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z3nozi(i32 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = sdiv i32 %4, 10000
  %6 = load i32, ptr @upleft, align 4, !tbaa !5
  %7 = icmp ne i32 %5, %6
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i1 false, ptr %2, align 1
  br label %22

9:                                                ; preds = %1
  br label %10

10:                                               ; preds = %18, %9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %13, label %21

13:                                               ; preds = %10
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = srem i32 %14, 10
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %17, label %18

17:                                               ; preds = %13
  store i1 false, ptr %2, align 1
  br label %22

18:                                               ; preds = %13
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = sdiv i32 %19, 10
  store i32 %20, ptr %3, align 4, !tbaa !5
  br label %10, !llvm.loop !9

21:                                               ; preds = %10
  store i1 true, ptr %2, align 1
  br label %22

22:                                               ; preds = %21, %17, %8
  %23 = load i1, ptr %2, align 1
  ret i1 %23
}

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"

@upleft = 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 zeroext i1 @_Z3nozi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sdiv i32 %0, 10000
  %3 = load i32, ptr @upleft, align 4, !tbaa !5
  %.not = icmp eq i32 %2, %3
  br i1 %.not, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %1
  %.not56 = icmp eq i32 %0, 0
  br i1 %.not56, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.preheader
  %.07 = phi i32 [ %0, %.preheader ], [ %5, %.lr.ph ]
  %4 = srem i32 %.07, 10
  %5 = sdiv i32 %.07, 10
  %.not10 = icmp ne i32 %4, 0
  %.not10.not = xor i1 %.not10, true
  %.07.off = add i32 %.07, 9
  %.not5 = icmp ult i32 %.07.off, 19
  %or.cond = or i1 %.not10.not, %.not5
  br i1 %or.cond, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %1
  %.04 = phi i1 [ false, %1 ], [ true, %.preheader ], [ %.not10, %.lr.ph ]
  ret i1 %.04
}

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,DivRemPairsPass,GlobalOptPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass