Michal Jires cf4eb26905 lto: Add must_remain_in_tu flags to symtab_node ...

With toplevel assembly we are sometimes not allowed to globalize static
symbols. So such symbols cannot be in more than one partition.

must_remain_in_tu_* guarantee that such symbols or references to them do
not escape the original translation unit. Thus 1to1 partitioning is always
valid.

gcc/ChangeLog:

	* cgraph.h: Add must_remain_in_tu_*.
	* cgraphclones.cc (cgraph_node::create_clone): Propagate
	must_remain_in_tu_body.
	* cif-code.def (MUST_REMAIN_IN_TU): New.
	* ipa-icf.cc (sem_function::equals_wpa): Check
	must_remain_in_tu_*
	(sem_variable::equals_wpa): Likewise.
	* ipa-inline-transform.cc (inline_call): Propagate
	must_remain_in_tu_body.
	* ipa-inline.cc (can_inline_edge_p): Check
	must_remain_in_tu_body.
	* lto-cgraph.cc (lto_output_node): Output must_remain_in_tu_*
	(lto_output_varpool_node): Likewise.
	(input_overwrite_node): Input must_remain_in_tu_*.
	(input_varpool_node): Likewise.
	* tree.cc (decl_address_ip_invariant_p): Check
	must_remain_in_tu_name.
	* varpool.cc (varpool_node::ctor_useable_for_folding_p): Check
	must_remain_in_tu_body.

gcc/lto/ChangeLog:

	* lto-symtab.cc (lto_cgraph_replace_node): Propagate
	must_remain_in_tu_*.
	(lto_varpool_replace_node): Likewise.

2026-01-11 22:48:54 +01:00

5.9 KiB

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