re PR other/18665 (-ftrapv borks up simple integer arithmetic)

re PR other/18665 (-ftrapv borks up simple integer arithmetic)

	PR other/18665
	* libgcc-std.ver (GCC_3.4.4): Inherit from GCC_3.4.2.
	Export __absvti2, __addvti3, __mulvti3, __negvti2 and __subvti3.
	* libgcc2.c (__addvsi3): Rename to __addvSI3.
	New version if COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	(__addvdi3): Rename to __addvDI3.
	(__subvsi3): Rename to __subvSI3.  Use word type for the result.
	New version if COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	(__subvdi3): Rename to __subvDI3.
	(_mulvsi3): Rename to _mulvSI3.
	New version if COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	(_mulvdi3): Rename to _mulvDI3.
	(__negvsi2): Rename to __negvSI2.
	New version if COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	(__negvdi2): Rename to __negvDI2.
	(__absvsi2): Rename to __absvSI2.
	New version if COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	(__absvdi2): Rename to __absvDI2.
	* libgcc2.h (64-bit targets): Define COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	(__absvSI2, __addvSI3, __subvSI3, __mulvSI3, __negvSI2, __absvDI2,
	__addvDI3, __subvDI3, __mulvDI3, __negvDI2): Define to the appropriate
	symbol and declare.
	(__absvsi2, __addvsi3, __subvsi3, __mulvsi3, __negvsi2): Declare if
	COMPAT_SIMODE_TRAPPING_ARITHMETIC.

From-SVN: r92187