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svn:author
V 3
dim
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svn:date
V 27
2013-02-22T18:33:42.340240Z
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svn:log
V 488
MFC r246858:

Pull in r175057 from upstream llvm trunk:

  X86: Disable generation of rep;movsl when %esi is used as a base pointer.

  This happens when there is both stack realignment and a dynamic alloca in the
  function. If we overwrite %esi (rep;movsl uses fixed registers) we'll lose the
  base pointer and the next register spill will write into oblivion.

  Fixes PR15249 and unbreaks firefox on i386/freebsd. Mozilla uses dynamic allocas
  and freebsd a 4 byte stack alignment.

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