[llvm-commits] [patch][pr12251] Add range metadata to llvm. Make clang produce it.

[Rafael Espíndola]

The attached llvm patch adds documentation and verification for the
range metadata. I will send a patch with optimzation and analysis once
this one is in.

The clang patch makes it produce the metadata for boolean and enum
loads. CCIng dgregor to make sure I got the enum ranges right. I
particular I am not sure what is the correct way to check for fixed
underlying types. Should I use the isFIxed method or look in
IntegerType?

Cheers,
Rafael
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