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Move warning suppression to the ultimate callee.

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Resolves:
PR bootstrap/101372 - -Warray-bounds in gcc/cp/module.cc causing bootstrap failure

gcc/cp/ChangeLog:

	PR bootstrap/101372
	* module.cc (identifier): Suppress warning.
	(module_state::read_macro_maps): Remove warning suppression.
	(module_state::install_macros): Ditto.
This commit is contained in:
Martin Sebor 2021-07-08 16:36:15 -06:00
parent 68b938fada
commit 79d3378c7d
1 changed files with 7 additions and 13 deletions
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20
gcc/cp/module.cc
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@ -274,7 +274,14 @@ static inline cpp_hashnode *cpp_node (tree id)
static inline tree identifier (const cpp_hashnode *node)
{
/* HT_NODE() expands to node->ident that HT_IDENT_TO_GCC_IDENT()
then subtracts a nonzero constant, deriving a pointer to
a different member than ident. That's strictly undefined
and detected by -Warray-bounds. Suppress it. See PR 101372. */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
return HT_IDENT_TO_GCC_IDENT (HT_NODE (const_cast<cpp_hashnode *> (node)));
#pragma GCC diagnostic pop
}
/* Id for dumping module information. */
@ -16301,18 +16308,11 @@ module_state::read_macro_maps ()
}
if (count)
sec.set_overrun ();
/* FIXME: Re-enable or fix after root causing. */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
dump (dumper::LOCATION)
&& dump ("Macro:%u %I %u/%u*2 locations [%u,%u)",
ix, identifier (node), runs, n_tokens,
MAP_START_LOCATION (macro),
MAP_START_LOCATION (macro) + n_tokens);
#pragma GCC diagnostic pop
}
location_t lwm = sec.u ();
macro_locs.first = lwm - slurp->loc_deltas.second;
@ -16918,10 +16918,6 @@ module_state::install_macros ()
macro_import::slot &slot = imp.append (mod, flags);
slot.offset = sec.u ();
/* FIXME: Re-enable or fix after root causing. */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
dump (dumper::MACRO)
&& dump ("Read %s macro %s%s%s %I at %u",
imp.length () > 1 ? "add" : "new",
@ -16942,8 +16938,6 @@ module_state::install_macros ()
exp.def = cur;
dump (dumper::MACRO)
&& dump ("Saving current #define %I", identifier (node));
#pragma GCC diagnostic pop
}
}