[llvm-dev] type-inference in tblgen for instrinfo
Lawrence, Peter via llvm-dev
llvm-dev at lists.llvm.org
Thu Jun 9 15:39:42 PDT 2016
If there is a design document describing the codegen backend to tblgen, and the type-inference system it uses, I would appreciate a pointer to it.
all I can find online, like "TableGen BackEnds" and "Writing an LLVM Backend", don't go into these details, but I seem to need a deeper understanding,
For example when I add "i32:" to an internal node of pattern tree, for example "i32:shl" in
[(set i32:$dst (i32:shl i32:rs1, i32:rs2))]
Then I get the error "expected variable name in dag operator", and a source cursor pointing to the "shl"
I am able to jump to all kinds of conclusions about the nature of this "error", but don't have any hard facts to go by.
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