MEGAPATCH checkin.

For details, See: docs/2002-06-25-MegaPatchInfo.txt

llvm-svn: 2778

(This can be improved to avoid making the initial pass over the method.)
Also, ensure automatic vars and reg. spills areas are not extended
if their sizes are used for computing some other offset.

llvm-svn: 2310

class.  The Method class is obsolete (renamed) and all references to it
are being converted over to Function.

llvm-svn: 2144

llvm-svn: 2070

llvm-svn: 1969

offset-from-FP will be before allocating space for a local variable.

llvm-svn: 1905

llvm-svn: 1788

Method::inst_* is now in llvm/Support/InstIterator.h
GraphTraits specializations for BasicBlock and Methods are now in llvm/Support/CFG.h

llvm-svn: 1746

llvm-svn: 1660