Chris Lattner 4418ce1091 change the concatenation avoidance algorithm to be partially table-driven
and avoid computing the spelling of tokens when not needed.  This speeds
up -E on 447.dealII by 2.2%

llvm-svn: 40421
2007-07-23 06:09:34 +00:00
2007-07-23 04:44:02 +00:00
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