[LLVMdev] How to define macros in a tablegen file?

[Sebastian Pop]

For reference, here is how the SPU port is using code and pattern fragments:

// Holder of code fragments (you'd think this'd already be in
// a td file somewhere... :-)

class CodeFrag<dag frag> {
  dag Fragment = frag;
}

class I64SETCCNegCond<PatFrag cond, CodeFrag compare>:
  Pat<(cond R64C:$rA, R64C:$rB),
      (XORIr32 compare.Fragment, -1)>;

def : I64SETCCNegCond<setne, I64EQr64>;
def : I64SELECTNegCond<setne, I64EQr64>;


Sebastian
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