; LLVM IR from tangjz/acm-icpc :: hdu/6356.ll (Z5rng61v)

; 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"

@X = external dso_local global i32, align 4
@Y = external dso_local global i32, align 4
@Z = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5rng61v() #0 {
  %1 = alloca i32, align 4
  %2 = load i32, ptr @X, align 4, !tbaa !5
  %3 = shl i32 %2, 11
  %4 = load i32, ptr @X, align 4, !tbaa !5
  %5 = xor i32 %4, %3
  store i32 %5, ptr @X, align 4, !tbaa !5
  %6 = load i32, ptr @X, align 4, !tbaa !5
  %7 = lshr i32 %6, 4
  %8 = load i32, ptr @X, align 4, !tbaa !5
  %9 = xor i32 %8, %7
  store i32 %9, ptr @X, align 4, !tbaa !5
  %10 = load i32, ptr @X, align 4, !tbaa !5
  %11 = shl i32 %10, 5
  %12 = load i32, ptr @X, align 4, !tbaa !5
  %13 = xor i32 %12, %11
  store i32 %13, ptr @X, align 4, !tbaa !5
  %14 = load i32, ptr @X, align 4, !tbaa !5
  %15 = lshr i32 %14, 14
  %16 = load i32, ptr @X, align 4, !tbaa !5
  %17 = xor i32 %16, %15
  store i32 %17, ptr @X, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  %18 = load i32, ptr @X, align 4, !tbaa !5
  %19 = load i32, ptr @Y, align 4, !tbaa !5
  %20 = xor i32 %18, %19
  %21 = load i32, ptr @Z, align 4, !tbaa !5
  %22 = xor i32 %20, %21
  store i32 %22, ptr %1, align 4, !tbaa !5
  %23 = load i32, ptr @Y, align 4, !tbaa !5
  store i32 %23, ptr @X, align 4, !tbaa !5
  %24 = load i32, ptr @Z, align 4, !tbaa !5
  store i32 %24, ptr @Y, align 4, !tbaa !5
  %25 = load i32, ptr %1, align 4, !tbaa !5
  store i32 %25, ptr @Z, align 4, !tbaa !5
  %26 = load i32, ptr @Z, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i32 %26
}

; 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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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"

@X = external dso_local local_unnamed_addr global i32, align 4
@Y = external dso_local local_unnamed_addr global i32, align 4
@Z = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z5rng61v() local_unnamed_addr #0 {
  %1 = load i32, ptr @X, align 4, !tbaa !5
  %2 = shl i32 %1, 11
  %3 = xor i32 %2, %1
  %4 = lshr i32 %3, 4
  %5 = xor i32 %4, %3
  %6 = shl i32 %5, 5
  %7 = xor i32 %6, %5
  %8 = lshr i32 %7, 14
  %9 = xor i32 %8, %7
  %10 = load i32, ptr @Y, align 4, !tbaa !5
  %11 = load i32, ptr @Z, align 4, !tbaa !5
  %12 = xor i32 %10, %9
  %13 = xor i32 %12, %11
  store i32 %10, ptr @X, align 4, !tbaa !5
  store i32 %11, ptr @Y, align 4, !tbaa !5
  store i32 %13, ptr @Z, align 4, !tbaa !5
  ret i32 %13
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, 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"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass