added transformation of those nodes into "real" ia32 nodes

CmpSet nodes are AM capable now
fixed emitters
fixed Psi transformation

fixed psi transformation but x87 support still missing

added xAndNot (SSE And Not)
added SSE support for Psi nodes (transform and emit)

transform Psi to Set if possible

Fixed output for be_Return

st registers are allocated by the x87 simulator and don't need a noreg

enabled Push peephole optimization

handle binops with two identical operands
add simulation for be_Return
fixed simulation for be_Copy
add register killing code at begin of every block
use node index as block number
create only labels for block that are jump targets

changed name prefix for SSE floating point nodes from f to x

added UKNWN register
set Unknown nodes to ignore and assign them the UKNWN register

fixed indents
added should be same constraint for lea
added additional statistics

fixed cmp with immediate
emit %cl for shift/rotate ops
fixed some minor bugs