; LLVM IR from buresjan/optim_lbm :: nomad/src/Math/RNG.ll (ZN9NOMAD_4_33RNG4randEv)

; 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"

@_ZN9NOMAD_4_33RNG2_xE = external dso_local global i32, align 4
@_ZN9NOMAD_4_33RNG2_yE = external dso_local global i32, align 4
@_ZN9NOMAD_4_33RNG2_zE = external dso_local global i32, align 4

; 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 nounwind uwtable
define dso_local noundef i32 @_ZN9NOMAD_4_33RNG4randEv() #1 align 2 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  %2 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %3 = shl i32 %2, 16
  %4 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %5 = xor i32 %4, %3
  store i32 %5, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %6 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %7 = lshr i32 %6, 5
  %8 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %9 = xor i32 %8, %7
  store i32 %9, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %10 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %11 = shl i32 %10, 1
  %12 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %13 = xor i32 %12, %11
  store i32 %13, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %14 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  store i32 %14, ptr %1, align 4, !tbaa !5
  %15 = load i32, ptr @_ZN9NOMAD_4_33RNG2_yE, align 4, !tbaa !5
  store i32 %15, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %16 = load i32, ptr @_ZN9NOMAD_4_33RNG2_zE, align 4, !tbaa !5
  store i32 %16, ptr @_ZN9NOMAD_4_33RNG2_yE, align 4, !tbaa !5
  %17 = load i32, ptr %1, align 4, !tbaa !5
  %18 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %19 = xor i32 %17, %18
  %20 = load i32, ptr @_ZN9NOMAD_4_33RNG2_yE, align 4, !tbaa !5
  %21 = xor i32 %19, %20
  store i32 %21, ptr @_ZN9NOMAD_4_33RNG2_zE, align 4, !tbaa !5
  %22 = load i32, ptr @_ZN9NOMAD_4_33RNG2_zE, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i32 %22
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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"

@_ZN9NOMAD_4_33RNG2_xE = external dso_local local_unnamed_addr global i32, align 4
@_ZN9NOMAD_4_33RNG2_yE = external dso_local local_unnamed_addr global i32, align 4
@_ZN9NOMAD_4_33RNG2_zE = 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 @_ZN9NOMAD_4_33RNG4randEv() local_unnamed_addr #0 align 2 {
  %1 = load i32, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %2 = shl i32 %1, 16
  %3 = xor i32 %2, %1
  %4 = lshr i32 %3, 5
  %5 = xor i32 %4, %3
  %6 = shl i32 %5, 1
  %7 = xor i32 %6, %5
  %8 = load i32, ptr @_ZN9NOMAD_4_33RNG2_yE, align 4, !tbaa !5
  store i32 %8, ptr @_ZN9NOMAD_4_33RNG2_xE, align 4, !tbaa !5
  %9 = load i32, ptr @_ZN9NOMAD_4_33RNG2_zE, align 4, !tbaa !5
  store i32 %9, ptr @_ZN9NOMAD_4_33RNG2_yE, align 4, !tbaa !5
  %10 = xor i32 %8, %7
  %11 = xor i32 %10, %9
  store i32 %11, ptr @_ZN9NOMAD_4_33RNG2_zE, align 4, !tbaa !5
  ret i32 %11
}

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