[PATCH] D47464: [mips] Process numeric register name in the .set assignment directive

[Simon Atanasyan via Phabricator via llvm-commits]

atanasyan created this revision.
atanasyan added a reviewer: sdardis.
Herald added a subscriber: arichardson.

Now LLVM assembler cannot process the following code and generates an error. GNU tools support .set assignment directive with numeric register name.

  .set r4, 4
  
  test.s:1:11: error: invalid token in expression
    .set r4, $4
             ^

This patch teach assembler to handle such directives correctly. Unfortunately a numeric register name cannot be represented as an expression. That's why we have to maintain a separate `StringMap` in the `MipsAsmParser` to keep mapping between aliases names and register numbers.


Repository:
  rL LLVM

https://reviews.llvm.org/D47464

Files:
  lib/Target/Mips/AsmParser/MipsAsmParser.cpp
  test/MC/Mips/mips_directives.s

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