; LLVM IR from QMUL-EECS-Networks-Systems/ebpf-sketches :: tests/micro-benchmarks/prandom_u32 (main_tausworthe)

; 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"

%struct.timespec = type { i64, i64 }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z13print_resultsP8timespecS0_mj(ptr noundef, ptr noundef, i64 noundef, i32 noundef) #0

; 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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z11prandom_u32v() #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z23prandom_seed_full_statev() #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.timespec, align 8
  %3 = alloca %struct.timespec, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %7 = call noundef i32 @_Z23prandom_seed_full_statev()
  %8 = icmp slt i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %0
  call void @exit(i32 noundef 1) #7
  unreachable

10:                                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #8
  call void @llvm.memset.p0.i64(ptr align 8 %2, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #8
  call void @llvm.memset.p0.i64(ptr align 8 %3, i8 0, i64 16, i1 false)
  %11 = call i32 @clock_gettime(i32 noundef 1, ptr noundef %2) #8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #8
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #8
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %21, %10
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = icmp slt i32 %13, 2000000000
  br i1 %14, label %16, label %15

15:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #8
  br label %24

16:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #8
  %17 = call noundef i32 @_Z11prandom_u32v()
  store i32 %17, ptr %6, align 4, !tbaa !5
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = xor i32 %19, %18
  store i32 %20, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #8
  br label %21

21:                                               ; preds = %16
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %5, align 4, !tbaa !5
  br label %12, !llvm.loop !9

24:                                               ; preds = %15
  %25 = call i32 @clock_gettime(i32 noundef 1, ptr noundef %3) #8
  %26 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z13print_resultsP8timespecS0_mj(ptr noundef %2, ptr noundef %3, i64 noundef 2000000000, i32 noundef %26)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #8
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #8
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #8
  ret i32 0
}

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #4

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #5

; Function Attrs: nounwind
declare i32 @clock_gettime(i32 noundef, ptr noundef) #6

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 = { mustprogress norecurse 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 = { noreturn nounwind "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #6 = { nounwind "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 #7 = { noreturn nounwind }
attributes #8 = { 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"

%struct.timespec = type { i64, i64 }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z13print_resultsP8timespecS0_mj(ptr noundef, ptr noundef, i64 noundef, i32 noundef) local_unnamed_addr #0

; 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 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 noundef i32 @_Z11prandom_u32v() local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z23prandom_seed_full_statev() local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #3 {
  %1 = alloca %struct.timespec, align 8
  %2 = alloca %struct.timespec, align 8
  %3 = tail call noundef i32 @_Z23prandom_seed_full_statev()
  %4 = icmp slt i32 %3, 0
  br i1 %4, label %5, label %6

5:                                                ; preds = %0
  tail call void @exit(i32 noundef 1) #7
  unreachable

6:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #8
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %1, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #8
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %2, i8 0, i64 16, i1 false)
  %7 = call i32 @clock_gettime(i32 noundef 1, ptr noundef nonnull %1) #8
  br label %10

8:                                                ; preds = %10
  %9 = call i32 @clock_gettime(i32 noundef 1, ptr noundef nonnull %2) #8
  call void @_Z13print_resultsP8timespecS0_mj(ptr noundef nonnull %1, ptr noundef nonnull %2, i64 noundef 2000000000, i32 noundef %12)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #8
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #8
  ret i32 0

10:                                               ; preds = %6, %10
  %.07 = phi i32 [ 0, %6 ], [ %12, %10 ]
  %.056 = phi i32 [ 0, %6 ], [ %13, %10 ]
  %11 = call noundef i32 @_Z11prandom_u32v()
  %12 = xor i32 %11, %.07
  %13 = add nuw nsw i32 %.056, 1
  %exitcond.not = icmp eq i32 %13, 2000000000
  br i1 %exitcond.not, label %8, label %10, !llvm.loop !5
}

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #4

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #5

; Function Attrs: nounwind
declare i32 @clock_gettime(i32 noundef, ptr noundef) local_unnamed_addr #6

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 = { mustprogress norecurse 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 = { noreturn nounwind "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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #6 = { nounwind "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 #7 = { noreturn nounwind }
attributes #8 = { 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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass