[PATCH] D12347: [MC/AsmParser] Avoid setting MCSymbol.IsUsed

[Vedant Kumar via llvm-commits]

vsk created this revision.
vsk added reviewers: rafael, ddunbar.
vsk added a subscriber: llvm-commits.

Avoid marking MCSymbols as used in MC/AsmParser.cpp when no uses exist.
    
This fixes a bug in parseAssignmentExpression() where we accidentally set IsUsed, thereby triggering:
    
    "invalid re-assignment of non-absolute variable"
    
on otherwise valid code. No other functionality is affected.

http://reviews.llvm.org/D12347

Files:
  lib/MC/MCParser/AsmParser.cpp
  test/MC/AsmParser/reassign.s

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