tcg-ia64: Use ADDS for small addition
Avoids a wasted cycle loading up small constants. Simplify the code assuming the tcg optimizer is going to work and don't expect the first operand of the add to be constant. Acked-by: NAurelien Jarno <aurelien@aurel32.net> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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