[PATCH] TableGen minor refactoring: AsmWriterEmitter and CodeGenDAGPatterns

[Ahmed Bougacha]

Hello everyone,

Here are 2 patches that prepare for upcoming additions. There
shouldn't be any functionality change.
Thanks for reviewing!

- Ahmed

----

    TableGen: Refactor DAG patterns to enable parsing one pattern at a time.

 utils/TableGen/CodeGenDAGPatterns.cpp | 112
 utils/TableGen/CodeGenDAGPatterns.h   |   5
 2 files changed, 66 insertions(+), 51 deletions(-)

----

    TableGen: Refactor AsmWriterEmitter to keep AsmWriterInsts.

    These used to be referenced by the CGI->AWI map (in AsmWriterEmitter), but
    stored in a vector local to EmitPrintInstruction. Move the vector to
    AsmWriterEmitter too.

 utils/TableGen/AsmWriterEmitter.cpp | 51
 1 file changed, 25 insertions(+), 26 deletions(-)
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