tree: Hide wi::from_mpz from GENERATOR_FILE

Similar to r0-85707-g34917a102a4e0c for PR35051, the uses
of mpz_t should be guarded with "#ifndef GENERATOR_FILE".
This patch is to fix it and avoid some possible build
errors.

gcc/ChangeLog:

	* tree.h (wi::from_mpz): Hide from GENERATOR_FILE.

1 files changed, 2 insertions, 0 deletions

diff --git a/gcc/tree.h b/gcc/tree.h
index fa02e29..4c04245 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -6467,7 +6467,9 @@ namespace wi
 
   wide_int min_value (const_tree);
   wide_int max_value (const_tree);
+#ifndef GENERATOR_FILE
   wide_int from_mpz (const_tree, mpz_t, bool);
+#endif
 }
 
 template <typename T>