Clean up initialization of LangOptions object by splitting part of it into a parent class
'LangOptionsBase' that default initializes all flags to 0.  Now the ctor of LangOptions
only initializes the flags that might be non-zero (significantly simplifying things).

This also appeases Valgrind on Mac OS X, which no longer reports that one of the flags
may be uninitialized.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119045 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed