; LLVM IR from cleongh/advancedprogramming :: lectures/lecture7/vegas.ll (Z14dumb_las_vegasi)

; 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::random_device" = type { %union.anon }
%union.anon = type { %"class.std::mersenne_twister_engine" }
%"class.std::mersenne_twister_engine" = type { [624 x i64], i64 }
%"class.std::uniform_int_distribution" = type { %"struct.std::uniform_int_distribution<>::param_type" }
%"struct.std::uniform_int_distribution<>::param_type" = type { i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z14dumb_las_vegasi(i32 noundef %0) #0 personality ptr @__gxx_personality_v0 {
  %2 = alloca i32, align 4
  %3 = alloca %"class.std::random_device", align 8
  %4 = alloca %"class.std::mersenne_twister_engine", align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca %"class.std::uniform_int_distribution", align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 5000, ptr %3) #3
  call void @_ZNSt13random_deviceC2Ev(ptr noundef nonnull align 8 dereferenceable(5000) %3)
  call void @llvm.lifetime.start.p0(i64 5000, ptr %4) #3
  %9 = invoke noundef i32 @_ZNSt13random_deviceclEv(ptr noundef nonnull align 8 dereferenceable(5000) %3)
          to label %10 unwind label %25

10:                                               ; preds = %1
  %11 = zext i32 %9 to i64
  invoke void @_ZNSt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEC2Em(ptr noundef nonnull align 8 dereferenceable(5000) %4, i64 noundef %11)
          to label %12 unwind label %25

12:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %13 = load i32, ptr %2, align 4, !tbaa !5
  invoke void @_ZNSt24uniform_int_distributionIiEC2Eii(ptr noundef nonnull align 4 dereferenceable(8) %7, i32 noundef 1, i32 noundef %13)
          to label %14 unwind label %29

14:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  br label %15

15:                                               ; preds = %18, %14
  %16 = invoke noundef i32 @_ZNSt24uniform_int_distributionIiEclISt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEEEiRT_(ptr noundef nonnull align 4 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(5000) %4)
          to label %17 unwind label %33

17:                                               ; preds = %15
  store i32 %16, ptr %8, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %17
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = srem i32 %19, %20
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %15, label %23, !llvm.loop !9

23:                                               ; preds = %18
  %24 = load i32, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 5000, ptr %4) #3
  call void @_ZNSt13random_deviceD2Ev(ptr noundef nonnull align 8 dereferenceable(5000) %3) #3
  call void @llvm.lifetime.end.p0(i64 5000, ptr %3) #3
  ret i32 %24

25:                                               ; preds = %10, %1
  %26 = landingpad { ptr, i32 }
          cleanup
  %27 = extractvalue { ptr, i32 } %26, 0
  store ptr %27, ptr %5, align 8
  %28 = extractvalue { ptr, i32 } %26, 1
  store i32 %28, ptr %6, align 4
  br label %38

29:                                               ; preds = %12
  %30 = landingpad { ptr, i32 }
          cleanup
  %31 = extractvalue { ptr, i32 } %30, 0
  store ptr %31, ptr %5, align 8
  %32 = extractvalue { ptr, i32 } %30, 1
  store i32 %32, ptr %6, align 4
  br label %37

33:                                               ; preds = %15
  %34 = landingpad { ptr, i32 }
          cleanup
  %35 = extractvalue { ptr, i32 } %34, 0
  store ptr %35, ptr %5, align 8
  %36 = extractvalue { ptr, i32 } %34, 1
  store i32 %36, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %37

37:                                               ; preds = %33, %29
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %38

38:                                               ; preds = %37, %25
  call void @llvm.lifetime.end.p0(i64 5000, ptr %4) #3
  call void @_ZNSt13random_deviceD2Ev(ptr noundef nonnull align 8 dereferenceable(5000) %3) #3
  call void @llvm.lifetime.end.p0(i64 5000, ptr %3) #3
  br label %39

39:                                               ; preds = %38
  %40 = load ptr, ptr %5, align 8
  %41 = load i32, ptr %6, align 4
  %42 = insertvalue { ptr, i32 } poison, ptr %40, 0
  %43 = insertvalue { ptr, i32 } %42, i32 %41, 1
  resume { ptr, i32 } %43
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt13random_deviceC2Ev(ptr noundef nonnull align 8 dereferenceable(5000)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNSt13random_deviceclEv(ptr noundef nonnull align 8 dereferenceable(5000)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEC2Em(ptr noundef nonnull align 8 dereferenceable(5000), i64 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt24uniform_int_distributionIiEC2Eii(ptr noundef nonnull align 4 dereferenceable(8), i32 noundef, i32 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNSt24uniform_int_distributionIiEclISt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEEEiRT_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(5000)) #0 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt13random_deviceD2Ev(ptr noundef nonnull align 8 dereferenceable(5000)) unnamed_addr #2 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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"

%"class.std::random_device" = type { %union.anon }
%union.anon = type { %"class.std::mersenne_twister_engine" }
%"class.std::mersenne_twister_engine" = type { [624 x i64], i64 }
%"class.std::uniform_int_distribution" = type { %"struct.std::uniform_int_distribution<>::param_type" }
%"struct.std::uniform_int_distribution<>::param_type" = type { i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z14dumb_las_vegasi(i32 noundef %0) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::random_device", align 8
  %3 = alloca %"class.std::mersenne_twister_engine", align 8
  %4 = alloca %"class.std::uniform_int_distribution", align 4
  call void @llvm.lifetime.start.p0(i64 5000, ptr nonnull %2) #3
  call void @_ZNSt13random_deviceC2Ev(ptr noundef nonnull align 8 dereferenceable(5000) %2)
  call void @llvm.lifetime.start.p0(i64 5000, ptr nonnull %3) #3
  %5 = invoke noundef i32 @_ZNSt13random_deviceclEv(ptr noundef nonnull align 8 dereferenceable(5000) %2)
          to label %6 unwind label %13

6:                                                ; preds = %1
  %7 = zext i32 %5 to i64
  invoke void @_ZNSt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEC2Em(ptr noundef nonnull align 8 dereferenceable(5000) %3, i64 noundef %7)
          to label %8 unwind label %13

8:                                                ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  invoke void @_ZNSt24uniform_int_distributionIiEC2Eii(ptr noundef nonnull align 4 dereferenceable(8) %4, i32 noundef 1, i32 noundef %0)
          to label %.preheader unwind label %15

.preheader:                                       ; preds = %8, %10
  %9 = invoke noundef i32 @_ZNSt24uniform_int_distributionIiEclISt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEEEiRT_(ptr noundef nonnull align 4 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(5000) %3)
          to label %10 unwind label %17

10:                                               ; preds = %.preheader
  %11 = srem i32 %9, %0
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %12, label %.preheader, !llvm.loop !5

12:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 5000, ptr nonnull %3) #3
  call void @_ZNSt13random_deviceD2Ev(ptr noundef nonnull align 8 dereferenceable(5000) %2) #3
  call void @llvm.lifetime.end.p0(i64 5000, ptr nonnull %2) #3
  ret i32 %9

13:                                               ; preds = %6, %1
  %14 = landingpad { ptr, i32 }
          cleanup
  br label %20

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

17:                                               ; preds = %.preheader
  %18 = landingpad { ptr, i32 }
          cleanup
  br label %19

19:                                               ; preds = %17, %15
  %.pn = phi { ptr, i32 } [ %18, %17 ], [ %16, %15 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br label %20

20:                                               ; preds = %19, %13
  %.pn.pn = phi { ptr, i32 } [ %.pn, %19 ], [ %14, %13 ]
  call void @llvm.lifetime.end.p0(i64 5000, ptr nonnull %3) #3
  call void @_ZNSt13random_deviceD2Ev(ptr noundef nonnull align 8 dereferenceable(5000) %2) #3
  call void @llvm.lifetime.end.p0(i64 5000, ptr nonnull %2) #3
  resume { ptr, i32 } %.pn.pn
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt13random_deviceC2Ev(ptr noundef nonnull align 8 dereferenceable(5000)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNSt13random_deviceclEv(ptr noundef nonnull align 8 dereferenceable(5000)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEC2Em(ptr noundef nonnull align 8 dereferenceable(5000), i64 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt24uniform_int_distributionIiEC2Eii(ptr noundef nonnull align 4 dereferenceable(8), i32 noundef, i32 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNSt24uniform_int_distributionIiEclISt23mersenne_twister_engineImLm32ELm624ELm397ELm31ELm2567483615ELm11ELm4294967295ELm7ELm2636928640ELm15ELm4022730752ELm18ELm1812433253EEEEiRT_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(5000)) local_unnamed_addr #0 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt13random_deviceD2Ev(ptr noundef nonnull align 8 dereferenceable(5000)) unnamed_addr #2 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass