https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104031
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
My guess is that the problem is that when the TARGET_EXPR_SLOT is created using
build_local_temp, current_function_decl is NULL, it is in s_op global namespace
var initializer.
Eventually we add it to ssdf and call in the new r12-6329 spot
split_nonconstant_init, which has:
743 if (VAR_P (dest) && !is_local_temp (dest))
744 {
745 DECL_INITIAL (dest) = init;
746 TREE_READONLY (dest) = 0;
747 }
but due to the still unchanged DECL_CONTEXT being NULL is_local_temp returns
false and we set DECL_INITIAL instead of what the code expects.
The temporary gets DECL_CONTEXT set only during gimplification.
So, I think either we should fill in TARGET_EXPR_SLOT's DECL_CONTEXT when we
are adding those exprs into ssdf, or the r12-6329 code should ensure the slot
has non-NULL DECL_CONTEXT if current_function_decl or something similar.
