[LLVMdev] (MC) <target>RegisterInfo.td: alternate register names

Carter, Jack jcarter at mips.com
Fri Feb 10 17:50:41 PST 2012

Folks, Please confirm or correct the following assertions:

In Target.td one of the data member fields for class Register is list<string> AltNames.

If this is for alternate names for a given register (in Mips $28 and $gp are the same) it would be quite useful for the llvm-mc assembler which has to handle cases where there are multiple names for the same register.

A quick recursive grep shows that no target is currently using this. It is also not use when generating <target>GenAsmMatcher.inc.

If this is the case, I will try and incorporate AltNames so the strings get correctly matched in the AsmMatcher.


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