[SPARC] Fix miscompilation of ada/g-calend.adb at -O2

[Eric Botcazou]

There is now a tail call in Time_Of with lot of 64-bit quantities around, 
including arguments, and this exposes an oversight in adddi3_insn_sp32.

Bootstrapped/regtested on SPARC/Solaris, applied on mainline and 4.7 branch.


2012-07-19  Eric Botcazou  <ebotcazou@adacore.com>

	* config/sparc/sparc.md (adddi3_insn_sp32): Add earlyclobber.


-- 
Eric Botcazou
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