John McCall 347132b32f IRgen optimization: cache the value of 'this' and 'vtt' instead of ...

repeatedly reloading from an alloca.  We still need to create the alloca
for debug info purposes (although we currently create it in all cases
because of some abstraction boundaries that're hard to break down).

llvm-svn: 96403

2010-02-16 22:04:33 +00:00

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