; LLVM IR from 0intro/wmii :: lib/libfmt/nan64.ll_ (isNaN)

; 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"

@uvinf = external hidden global i64, align 8
@uvneginf = external hidden global i64, align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @__isNaN(double noundef %0) #0 {
  %2 = alloca double, align 8
  %3 = alloca i64, align 8
  store double %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %4 = load double, ptr %2, align 8, !tbaa !5
  %5 = call i64 @d2u(double noundef %4)
  store i64 %5, ptr %3, align 8, !tbaa !9
  %6 = load i64, ptr %3, align 8, !tbaa !9
  %7 = load i64, ptr @uvinf, align 8, !tbaa !9
  %8 = and i64 %6, %7
  %9 = load i64, ptr @uvinf, align 8, !tbaa !9
  %10 = icmp eq i64 %8, %9
  br i1 %10, label %11, label %17

11:                                               ; preds = %1
  %12 = load i64, ptr %3, align 8, !tbaa !9
  %13 = load i64, ptr @uvneginf, align 8, !tbaa !9
  %14 = xor i64 %13, -1
  %15 = and i64 %12, %14
  %16 = icmp ne i64 %15, 0
  br label %17

17:                                               ; preds = %11, %1
  %18 = phi i1 [ false, %1 ], [ %16, %11 ]
  %19 = zext i1 %18 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i32 %19
}

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

; Function Attrs: nounwind uwtable
declare hidden i64 @d2u(double noundef) #0

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

attributes #0 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !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"

@uvinf = external hidden local_unnamed_addr global i64, align 8
@uvneginf = external hidden local_unnamed_addr global i64, align 8

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @__isNaN(double noundef %0) local_unnamed_addr #0 {
  %2 = tail call i64 @d2u(double noundef %0)
  %3 = load i64, ptr @uvinf, align 8, !tbaa !5
  %4 = and i64 %3, %2
  %5 = icmp eq i64 %4, %3
  br i1 %5, label %6, label %12

6:                                                ; preds = %1
  %7 = load i64, ptr @uvneginf, align 8, !tbaa !5
  %8 = xor i64 %7, -1
  %9 = and i64 %2, %8
  %10 = icmp ne i64 %9, 0
  %11 = zext i1 %10 to i32
  br label %12

12:                                               ; preds = %6, %1
  %13 = phi i32 [ 0, %1 ], [ %11, %6 ]
  ret i32 %13
}

; Function Attrs: nounwind uwtable
declare hidden i64 @d2u(double noundef) local_unnamed_addr #0

attributes #0 = { 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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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