alloca + function call

[Ulrich Drepper]

Hi,

Could gcc be changed in a way that code like

	a = foo (alloca (42), b);

generated an error (or at least a warning)?  On machines which pass
parameters on the stack a straight forward implementation (in ix86 asm)

	pushl	b
	subl	$42, %esp	allocate 42 bytes on stack
	pushl	%esp
	call	foo

will fail miserable.

-- Uli
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