On 7/29/24 8:18 AM, Arsen Arsenović wrote:
When register_local_var_uses iterates a BIND_EXPRs BIND_EXPR_VARS, it
fails to account for the fact that FUNCTION_DECLs might be present, and
later passes it to DECL_HAS_VALUE_EXPR_P. This leads to a tree check
failure in DECL_HAS_VALUE_EXPR_P:
tree check: expected var_decl or parm_decl or result_decl, have
function_decl in register_local_var_uses
Much like types and namespaces, we don't need to check FUNCTION_DECLs.
Simply skip them.
If we only want variables (including parms), it seems better to check
for them rather than "not all other things"?
PR c++/115906 - [coroutines] missing diagnostic and ICE when co_await used as
default argument in function declaration
gcc/cp/ChangeLog:
PR c++/115906
* coroutines.cc (register_local_var_uses): Skip FUNCTION_DECLs.
gcc/testsuite/ChangeLog:
PR c++/115906
* g++.dg/coroutines/coro-function-decl.C: New test.
---
Tested on x86_64-pc-linux-gnu.
OK for trunk?
TIA, have a lovely day.
gcc/cp/coroutines.cc | 1 +
.../g++.dg/coroutines/coro-function-decl.C | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/coroutines/coro-function-decl.C
diff --git a/gcc/cp/coroutines.cc b/gcc/cp/coroutines.cc
index 2b16b4814d10..8cd619d7eaed 100644
--- a/gcc/cp/coroutines.cc
+++ b/gcc/cp/coroutines.cc
@@ -3928,6 +3928,7 @@ register_local_var_uses (tree *stmt, int *do_subtree,
void *d)
/* Make sure that we only present vars to the tests below. */
if (TREE_CODE (lvar) == TYPE_DECL
+ || TREE_CODE (lvar) == FUNCTION_DECL
|| TREE_CODE (lvar) == NAMESPACE_DECL)
continue;
diff --git a/gcc/testsuite/g++.dg/coroutines/coro-function-decl.C b/gcc/testsuite/g++.dg/coroutines/coro-function-decl.C
new file mode 100644
index 000000000000..86140569a76e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/coroutines/coro-function-decl.C
@@ -0,0 +1,19 @@
+#include <coroutine>
+
+struct task
+{
+ struct promise_type
+ {
+ std::suspend_always initial_suspend () { return {}; }
+ std::suspend_always final_suspend () noexcept { return {}; }
+ void unhandled_exception () {}
+ task get_return_object () noexcept { return {}; }
+ void return_void () {}
+ };
+};
+
+task foo ()
+{
+ void bar ();
+ co_return;
+}