Implement folding of expressions like 'uint cast (int* getelementptr (int* null, uint 1) to uint)' to a constant integer.  We can only do this with primitive LLVM types, because other types have target-specific sizes.
Implement folding of expressions like 'uint cast (int* getelementptr (int*
null, uint 1) to uint)' to a constant integer.  We can only do this with
primitive LLVM types, because other types have target-specific sizes.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@14837 91177308-0d34-0410-b5e6-96231b3b80d8

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