[PATCH] Drop excess size used for run time allocated stack variables.

[Dominik Vogt]

The attached patch removes excess stack space allocation with
alloca in some situations.  Plese check the commit message in the
patch for details.

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany
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gcc/ChangeLog

	* explow.c (round_push): Use know adjustment.
	(allocate_dynamic_stack_space): Pass known adjustment to round_push.
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