[PATCH]: optimize HC11/HC12 32-bit shift pattern

[Stephane Carrez]

Hi!

The following patch improves the HC11/HC12 32-bit shifts to avoid saving
a register if we know it is dead at the current point.  I've committed this
on mainline and 3_1 branch.

	Stephane

2002-07-05  Stephane Carrez  <stcarrez@nerim.fr>

	* config/m68hc11/m68hc11.md ("*ashlsi3"): Avoid saving y if we know
	it is dead.
	("*ashrsi3"): Likewise.
	("*lshrsi3"): Likewise.

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