While doing bogus call LHS removal I noticed that cloning with
dropping a return value creates a bogus replacement for a
DECL_BY_REFERENCE DECL_RESULT, resulting in MEM_REFs of
aggregates rather than pointers. The following fixes this
latent issue.
I don't have a testcase that ICEs without doing a bogus DSE
transform though.
Bootstrap & regtest running on x86_64-unknown-linux-gnu.
2021-05-06 Richard Biener <rguent...@suse.de>
* tree-inline.c (tree_function_versioning): Fix DECL_BY_REFERENCE
return variable removal.
---
gcc/tree-inline.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c
index 49a5850f410..8f945b88c12 100644
--- a/gcc/tree-inline.c
+++ b/gcc/tree-inline.c
@@ -6367,6 +6367,8 @@ tree_function_versioning (tree old_decl, tree new_decl,
tree resdecl_repl = copy_result_decl_to_var (DECL_RESULT (old_decl),
&id);
declare_inline_vars (NULL, resdecl_repl);
+ if (DECL_BY_REFERENCE (DECL_RESULT (old_decl)))
+ resdecl_repl = build_fold_addr_expr (resdecl_repl);
insert_decl_map (&id, DECL_RESULT (old_decl), resdecl_repl);
DECL_RESULT (new_decl)
--
2.26.2
