Don't lose asm sets of frame pointer

[Eric Botcazou]

> 	PR 13169
> 	* basic-block.h (PROP_ASM_SCAN): Define.
> 	* final.c (regs_asm_clobbered): New array.
> 	* regs.h (regs_asm_clobbered): Declare.
> 	* flow.c (life_analysis): Init it.
> 	(mark_set_regs): Set PROP_ASM_SCAN for asms.
> 	(mark_set_1): Set regs_asm_clobbered.
> 	* global.c (global_alloc): Don't set eliminable_regset when
> 	regs_asm_clobbered.
>
> Bootstrapped and tested on the 3.3 branch.  Mainline regression test in
> progress.

Just two little questions: is this a regression on the 3.3 branch? Do you 
plan to put the fix there?

-- 
Eric Botcazou