; LLVM IR from idmillington/cyclone-physics :: src/random.ll (ZN7cyclone6Random10randomRealEv)

; 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"

%union.anon = type { double }

; 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
declare dso_local noundef i32 @_ZN7cyclone6Random10randomBitsEv(ptr noundef nonnull align 4 dereferenceable(76)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_ZN7cyclone6Random10randomRealEv(ptr noundef nonnull align 4 dereferenceable(76) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca %union.anon, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %6 = call noundef i32 @_ZN7cyclone6Random10randomBitsEv(ptr noundef nonnull align 4 dereferenceable(76) %5)
  store i32 %6, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = shl i32 %7, 20
  %9 = getelementptr inbounds [2 x i32], ptr %4, i64 0, i64 0
  store i32 %8, ptr %9, align 8, !tbaa !11
  %10 = load i32, ptr %3, align 4, !tbaa !9
  %11 = lshr i32 %10, 12
  %12 = or i32 %11, 1072693248
  %13 = getelementptr inbounds [2 x i32], ptr %4, i64 0, i64 1
  store i32 %12, ptr %13, align 4, !tbaa !11
  %14 = load double, ptr %4, align 8, !tbaa !11
  %15 = fsub double %14, 1.000000e+00
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret double %15
}

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 = !{!"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 = !{!7, !7, i64 0}


; 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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN7cyclone6Random10randomBitsEv(ptr noundef nonnull align 4 dereferenceable(76)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_ZN7cyclone6Random10randomRealEv(ptr noundef nonnull align 4 dereferenceable(76) %0) local_unnamed_addr #0 align 2 {
  %2 = tail call noundef i32 @_ZN7cyclone6Random10randomBitsEv(ptr noundef nonnull align 4 dereferenceable(76) %0)
  %3 = shl i32 %2, 20
  %.sroa.0.0.insert.ext = zext i32 %3 to i64
  %4 = lshr i32 %2, 12
  %5 = or disjoint i32 %4, 1072693248
  %.sroa.0.4.insert.ext = zext nneg i32 %5 to i64
  %.sroa.0.4.insert.shift = shl nuw nsw i64 %.sroa.0.4.insert.ext, 32
  %.sroa.0.4.insert.insert = or disjoint i64 %.sroa.0.4.insert.shift, %.sroa.0.0.insert.ext
  %6 = bitcast i64 %.sroa.0.4.insert.insert to double
  %7 = fadd double %6, -1.000000e+00
  ret double %7
}

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" }

!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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,TailCallElimPass