Chris Lattner 8879e06d0a implement and document support for filecheck variables. This ...

allows matching and remembering a string and then matching and
verifying that the string occurs later in the file.

Change X86/xor.ll to use this in some cases where the test was
checking for an arbitrary register allocation decision.

llvm-svn: 82891

2009-09-27 07:56:52 +00:00

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