[PATCH] D29963: Apply different tokenization rules to linker script expressions.

[Rui Ueyama via Phabricator via llvm-commits]

ruiu created this revision.

The linker script lexer is context-sensitive. In the regular context,
arithmetic operator characters are regular characters, but in the
expression context, they are independent tokens. This afects how the
lexer tokenizes "3*4", for example. (This kind of expression is real;
the Linux kernel uses it.)

This patch defines function `maybeSplitExpr`. This function splits the
current token into multiple expression tokens if the lexer is in the
expression context.


https://reviews.llvm.org/D29963

Files:
  lld/ELF/LinkerScript.cpp
  lld/ELF/ScriptLexer.cpp
  lld/ELF/ScriptLexer.h
  lld/test/ELF/linkerscript/operators.s

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