RFR (S): 8184162: Support addresses with index operands in LIRAssembler::leal on SPARC

[Erik Österlund]

Hi,

Bug:
https://bugs.openjdk.java.net/browse/JDK-8184162

Webrev:
http://cr.openjdk.java.net/~eosterlund/8184162/webrev.00/

The LIRAssembler::leal member function on SPARC complains about loading 
the effecting addresses where the address has an index operand, with the 
following assert stating it is not yet supported:

assert(addr->index()->is_illegal() && addr->scale() == 
LIR_Address::times_1, "can't handle complex addresses yet");

Support for index operands in the address is required for some upcoming 
changes, therefore it would be nice if this was supported.
So here is a webrev that starts supporting index operands for leal on SPARC.

Testing: JPRT -testset hotspot, and manual code inspection on a T7-4 
SPARC machine

Thanks,
/Erik