Hi!
Some of the builtin folding sets TREE_NO_WARNING flags, which triggers as
--enable-checking=fold errors. I think we should allow setting of
TREE_NO_WARNING flag when folding, so this patch arranges that.
Tested on:
../configure --enable-languages=c,c++,fortran --enable-checking=fold
--disable-bootstrap
make -jN && make -jN -k check
No extra FAILs compared to normal regtest. Ok for trunk?
2019-03-01 Jakub Jelinek <ja...@redhat.com>
PR middle-end/89503
* fold-const.c (fold_checksum_tree): Ignore TREE_NO_WARNING bit
on DECL_P and EXPR_P.
--- gcc/fold-const.c.jj 2019-02-21 00:01:05.714931643 +0100
+++ gcc/fold-const.c 2019-02-27 12:27:38.749353680 +0100
@@ -12130,6 +12130,7 @@ fold_checksum_tree (const_tree expr, str
memcpy ((char *) &buf, expr, tree_size (expr));
SET_DECL_ASSEMBLER_NAME ((tree)&buf, NULL);
buf.decl_with_vis.symtab_node = NULL;
+ buf.base.nowarning_flag = 0;
expr = (tree) &buf;
}
else if (TREE_CODE_CLASS (code) == tcc_type
@@ -12155,6 +12156,13 @@ fold_checksum_tree (const_tree expr, str
TYPE_CACHED_VALUES (tmp) = NULL;
}
}
+ else if (TREE_NO_WARNING (expr) && (DECL_P (expr) || EXPR_P (expr)))
+ {
+ /* Allow TREE_NO_WARNING to be set. */
+ memcpy ((char *) &buf, expr, tree_size (expr));
+ buf.base.nowarning_flag = 0;
+ expr = (tree) &buf;
+ }
md5_process_bytes (expr, tree_size (expr), ctx);
if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
fold_checksum_tree (TREE_TYPE (expr), ctx, ht);
Jakub
