I have registers that can hold either integer or floating point values. There
are instructions for integer operands, floating operands, and also a
"mixed" type operand, ie an operand that is the result of either an
integer or floating point operation.
I see that the RegisterClass has a list of ValueTypes, and I conclude that I can
define a register class to use for the mixed operands that has both integer and
floating point valuetypes. I would like to do:
reg:IntRC = IntegerOp...
~or~
reg:FloatRC = FloatOp ...
...
consumingMI regOp:MixedRC
IntRC = [i32], "reg1,...", FloatRC = [f32], "reg1, ...",
MixedRC = [i32, f32], "reg1, ...".
Does this approach seem fair? What are the consequences in the backend for the
different value types for operands?
/Jonas
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