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2019 Apr 26
3
tablegen dag syntax question
What is the difference between these two fragments (taken from two
different tblgen record dumps)?
dag OutOperandList = (outs GPR:$rd);
dag OutOperandList = (outs R2);
The first is from the RISCV backend record dump. There will be a
substitution at some point for $rd. In the second, I'm specifying R2, no
substitution necessary.
If I specify GPR64:R2 or i64:R2 in my Instruction def,