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c++: don't ICE on NAMESPACE_DECL inside FUNCTION_DECL

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Code like
  void swap() {
    namespace __variant = __detail::__variant;
    ...
  }
create a NAMESPACE_DECL where the CP_DECL_CONTEXT is a FUNCTION_DECL.
DECL_TEMPLATE_INFO fails on NAMESPACE_DECL and therefore must be handled
first in the assertion.

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

gcc/cp/ChangeLog:

	* module.cc (trees_out::get_merge_kind): NAMESPACE_DECLs also
	cannot have a DECL_TEMPLATE_INFO.
This commit is contained in:
Matthias Kretz 2021-12-15 09:45:06 +01:00
parent 89cf57ea35
commit 6bcb6ed5a4
1 changed files with 3 additions and 2 deletions
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5
gcc/cp/module.cc
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@ -10067,9 +10067,10 @@ trees_out::get_merge_kind (tree decl, depset *dep)
tree ctx = CP_DECL_CONTEXT (decl);
if (TREE_CODE (ctx) == FUNCTION_DECL)
{
/* USING_DECLs cannot have DECL_TEMPLATE_INFO -- this isn't
permitting them to have one. */
/* USING_DECLs and NAMESPACE_DECLs cannot have DECL_TEMPLATE_INFO --
this isn't permitting them to have one. */
gcc_checking_assert (TREE_CODE (decl) == USING_DECL
|| TREE_CODE (decl) == NAMESPACE_DECL
|| !DECL_LANG_SPECIFIC (decl)
|| !DECL_TEMPLATE_INFO (decl));