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[lto][patch] Remove old unused patch


We no longer need any special treatment for builtin function type merging.

This patch reverts most of a previous one and moves match_builtin_function_types
back to the location it has on trunk.

2009-04-03  Rafael Avila de Espindola  <espindola@google.com>

	Partial revert of

	2007-11-08  Nathan Froyd  <froydnj@codesourcery.com>

        	* c-decl.c (match_builtin_function_types): Move this...
        	* tree.c (match_builtin_function_types): ...here.
        	* tree.h (match_builtin_function_types): Declare it.

	2007-11-08  Nathan Froyd  <froydnj@codesourcery.com>

        	* lto.c (lto_read_subroutine_type_subprogram_DIE): Handle
        	DW_AT_decl_line.
        	* lto-symtab.c (lto_symtab_merge_decl): Handle redefinition of a
        	builtin specially.  Move check for attribute compatibility
        	earlier.


Cheers,
-- 
Rafael Avila de Espindola

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