[llvm-commits] EH cleanup

[Duncan Sands]

TypeInfos are passed around as pointers (i8*), yet when
a null value is needed it is passed as an i32 value of 0,
rather than an i8* null.  The attached patches change to
using an i8* null in LLVM and llvm-gcc.  At the same time
I eliminated some uses of std::vector<Value*> as a way of
holding a single Value* in the llvm-gcc EH stuff.

Ciao,

Duncan.
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