; LLVM IR from HenryRLee/PokerHandEvaluator :: cpp/src/card_sampler.ll (ZN12card_sampler11CardSampler6sampleEi)

; 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"

%"class.std::linear_congruential_engine" = type { i64 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.card_sampler::CardSampler" = type { %"struct.std::array" }
%"struct.std::array" = type { [52 x i32] }

@_ZN12card_samplerL9generatorE = external hidden global %"class.std::linear_congruential_engine", align 8

; 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 uwtable
define dso_local void @_ZN12card_sampler11CardSampler6sampleEi(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr noundef nonnull align 4 dereferenceable(208) %1, i32 noundef %2) #1 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i1, align 1
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %14 = load ptr, ptr %5, align 8
  store i1 false, ptr %7, align 1
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  %15 = getelementptr inbounds %"class.card_sampler::CardSampler", ptr %14, i32 0, i32 0
  %16 = call noundef i64 @_ZNKSt5arrayIiLm52EE4sizeEv(ptr noundef nonnull align 4 dereferenceable(208) %15) #6
  %17 = trunc i64 %16 to i32
  store i32 %17, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %47, %3
  %19 = load i32, ptr %9, align 4, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  br label %59

23:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  %24 = invoke noundef i64 @_ZNSt26linear_congruential_engineImLm16807ELm0ELm2147483647EEclEv(ptr noundef nonnull align 8 dereferenceable(8) @_ZN12card_samplerL9generatorE)
          to label %25 unwind label %50

25:                                               ; preds = %23
  %26 = load i32, ptr %8, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = urem i64 %24, %27
  %29 = trunc i64 %28 to i32
  store i32 %29, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #5
  %30 = load i32, ptr %8, align 4, !tbaa !9
  %31 = sub nsw i32 %30, 1
  store i32 %31, ptr %13, align 4, !tbaa !9
  %32 = getelementptr inbounds %"class.card_sampler::CardSampler", ptr %14, i32 0, i32 0
  %33 = load i32, ptr %10, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208) %32, i64 noundef %34) #5
  %36 = getelementptr inbounds %"class.card_sampler::CardSampler", ptr %14, i32 0, i32 0
  %37 = load i32, ptr %13, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208) %36, i64 noundef %38) #5
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %35, ptr noundef nonnull align 4 dereferenceable(4) %39) #5
  %40 = getelementptr inbounds %"class.card_sampler::CardSampler", ptr %14, i32 0, i32 0
  %41 = load i32, ptr %13, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208) %40, i64 noundef %42) #5
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %43)
          to label %44 unwind label %54

44:                                               ; preds = %25
  %45 = load i32, ptr %8, align 4, !tbaa !9
  %46 = add nsw i32 %45, -1
  store i32 %46, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  br label %47

47:                                               ; preds = %44
  %48 = load i32, ptr %9, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %9, align 4, !tbaa !9
  br label %18, !llvm.loop !11

50:                                               ; preds = %23
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %11, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %12, align 4
  br label %58

54:                                               ; preds = %25
  %55 = landingpad { ptr, i32 }
          cleanup
  %56 = extractvalue { ptr, i32 } %55, 0
  store ptr %56, ptr %11, align 8
  %57 = extractvalue { ptr, i32 } %55, 1
  store i32 %57, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #5
  br label %58

58:                                               ; preds = %54, %50
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #5
  br label %63

59:                                               ; preds = %22
  store i1 true, ptr %7, align 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  %60 = load i1, ptr %7, align 1
  br i1 %60, label %62, label %61

61:                                               ; preds = %59
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #5
  br label %62

62:                                               ; preds = %61, %59
  ret void

63:                                               ; preds = %58
  %64 = load ptr, ptr %11, align 8
  %65 = load i32, ptr %12, align 4
  %66 = insertvalue { ptr, i32 } poison, ptr %64, 0
  %67 = insertvalue { ptr, i32 } %66, i32 %65, 1
  resume { ptr, i32 } %67
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind willreturn memory(none) uwtable
declare dso_local noundef i64 @_ZNKSt5arrayIiLm52EE4sizeEv(ptr noundef nonnull align 4 dereferenceable(208)) #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt26linear_congruential_engineImLm16807ELm0ELm2147483647EEclEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { 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 #3 = { mustprogress nounwind willreturn memory(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" }
attributes #4 = { inlinehint 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 #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(none) }

!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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

%"class.std::linear_congruential_engine" = type { i64 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_ZN12card_samplerL9generatorE = external hidden global %"class.std::linear_congruential_engine", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12card_sampler11CardSampler6sampleEi(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector") align 8 %0, ptr noundef nonnull align 4 dereferenceable(208) %1, i32 noundef %2) local_unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  tail call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %5 = tail call noundef i64 @_ZNKSt5arrayIiLm52EE4sizeEv(ptr noundef nonnull align 4 dereferenceable(208) %1) #5
  %sext19 = shl i64 %5, 32
  %6 = ashr exact i64 %sext19, 32
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %14
  %indvars.iv = phi i64 [ %6, %.lr.ph.preheader ], [ %indvars.iv.next, %14 ]
  %.01416 = phi i32 [ 0, %.lr.ph.preheader ], [ %15, %14 ]
  %7 = invoke noundef i64 @_ZNSt26linear_congruential_engineImLm16807ELm0ELm2147483647EEclEv(ptr noundef nonnull align 8 dereferenceable(8) @_ZN12card_samplerL9generatorE)
          to label %8 unwind label %16

8:                                                ; preds = %.lr.ph
  %9 = urem i64 %7, %indvars.iv
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %sext = shl i64 %9, 32
  %10 = ashr exact i64 %sext, 32
  %11 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208) %1, i64 noundef %10) #4
  %12 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208) %1, i64 noundef %indvars.iv.next) #4
  tail call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %11, ptr noundef nonnull align 4 dereferenceable(4) %12) #4
  %13 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208) %1, i64 noundef %indvars.iv.next) #4
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %13)
          to label %14 unwind label %18

14:                                               ; preds = %8
  %15 = add nuw nsw i32 %.01416, 1
  %exitcond.not = icmp eq i32 %15, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

16:                                               ; preds = %.lr.ph
  %17 = landingpad { ptr, i32 }
          cleanup
  br label %20

18:                                               ; preds = %8
  %19 = landingpad { ptr, i32 }
          cleanup
  br label %20

20:                                               ; preds = %18, %16
  %.pn = phi { ptr, i32 } [ %19, %18 ], [ %17, %16 ]
  tail call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  resume { ptr, i32 } %.pn

._crit_edge:                                      ; preds = %14, %3
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none) uwtable
declare dso_local noundef i64 @_ZNKSt5arrayIiLm52EE4sizeEv(ptr noundef nonnull align 4 dereferenceable(208)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt26linear_congruential_engineImLm16807ELm0ELm2147483647EEclEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5arrayIiLm52EEixEm(ptr noundef nonnull align 4 dereferenceable(208), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

attributes #0 = { mustprogress 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 = { 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 = { mustprogress nofree nosync nounwind willreturn memory(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" }
attributes #3 = { inlinehint 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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(none) }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass