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PR c++/79050 - ICE with undeduced auto and LTO 

* decl.c (poplevel): Remove undeduced auto decls.

From-SVN: r245510
This commit is contained in:
Jason Merrill 2017-02-16 11:42:00 -05:00 committed by Jason Merrill
parent 31927af6c7
commit 61cee26030
3 changed files with 17 additions and 2 deletions
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5
gcc/cp/ChangeLog
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@ -1,3 +1,8 @@
2017-02-16 Jason Merrill <jason@redhat.com>
PR c++/79050 - ICE with undeduced auto and LTO
* decl.c (poplevel): Remove undeduced auto decls.
2017-02-16 Jakub Jelinek <jakub@redhat.com>
PR c++/79512

7
gcc/cp/decl.c
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@ -792,14 +792,17 @@ poplevel (int keep, int reverse, int functionbody)
back ends won't understand OVERLOAD, so we remove them here.
Because the BLOCK_VARS are (temporarily) shared with
CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
popped all the bindings. */
popped all the bindings. Also remove undeduced 'auto' decls,
which LTO doesn't understand, and can't have been used by anything. */
if (block)
{
tree* d;
for (d = &BLOCK_VARS (block); *d; )
{
if (TREE_CODE (*d) == TREE_LIST)
if (TREE_CODE (*d) == TREE_LIST
|| (!processing_template_decl
&& undeduced_auto_decl (*d)))
*d = TREE_CHAIN (*d);
else
d = &DECL_CHAIN (*d);

7
gcc/testsuite/g++.dg/lto/pr79050_0.C Normal file
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@ -0,0 +1,7 @@
// PR c++/79050
// { dg-lto-do assemble }
int main ()
{
auto foo ();
}