{-# OPTIONS_GHC -Wunused-imports #-}

{-# LANGUAGE MagicHash #-}
module Agda.Utils.Unsafe (unsafeComparePointers) where

import GHC.Exts (reallyUnsafePtrEquality#, isTrue#)

-- | Checks if two arguments are equal as pointers in memory.
-- Please note, that this function is a hack, and it can worsen the behavior of compiler.
-- See <https://gitlab.haskell.org/ghc/ghc/-/blob/d151546e59a50158f25c3df6728b00d3c27bb4b9/compiler/GHC/Builtin/primops.txt.pp#L3455>.
unsafeComparePointers :: a -> a -> Bool
unsafeComparePointers :: forall a. a -> a -> Bool
unsafeComparePointers a
x a
y = a
x a -> Bool -> Bool
forall a b. a -> b -> b
`seq` a
y a -> Bool -> Bool
forall a b. a -> b -> b
`seq` Int# -> Bool
isTrue# (a -> a -> Int#
forall a b. a -> b -> Int#
reallyUnsafePtrEquality# a
x a
y)