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From: "jgarzik at pobox dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/47000] [4.5 Regression] Failure to inline SSE intrinsics
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47000

--- Comment #17 from Jeff Garzik <jgarzik at pobox dot com> 2010-12-18 21:15:28 UTC ---
(In reply to comment #8)
> -    if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD)
> +    /* Do not special case builtins where we see the body.
> +       This just confuse inliner.  */
> +    if (!decl || cgraph_node (decl)->analyzed)
> +      ;
> +    else if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD)
>        cost = weights->target_builtin_call_cost;
>      else
>        cost = weights->call_cost;

This patch successfully fixes the performance regression in 4.5.1.