libffi.call/return_sc.c regression

[Geoff Keating]

Hi Andreas,

This change:

2008-01-05  Andreas Tobler  <a.tobler@schweiz.org>

	PR testsuite/32843
	* src/x86/ffi.c (ffi_prep_cif_machdep): Add code for
	signed/unsigned int8/16 for X86_DARWIN.
	Updated copyright info.
	Handle one and two byte structs with special cif->flags.
	* src/x86/ffitarget.h: Add special types for one and two byte structs.
	Updated copyright info.
	* src/x86/darwin.S (ffi_call_SYSV): Rewrite to use a jump table like
	sysv.S
	Remove code to pop args from the stack after call.
	Special-case signed/unsigned for int8/16, one and two byte structs.
	(ffi_closure_raw_SYSV): Handle FFI_TYPE_UINT8,
	FFI_TYPE_SINT8, FFI_TYPE_UINT16, FFI_TYPE_SINT16, FFI_TYPE_UINT32,
	FFI_TYPE_SINT32.
	Updated copyright info.

appears to cause:

FAIL: libffi.call/return_sc.c -O0 -W -Wall execution test
FAIL: libffi.call/return_sc.c -O2 execution test
FAIL: libffi.call/return_sc.c -O3 execution test

on i386-linux.

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