[llvm-dev] Comparing constant values of aggregate types for equality

[Christer Swahn via llvm-dev]

Hi,

This seems to me to be a straight-forward operation and perhaps available
within LLVM's API but I've been unable to find any guidance via google /
stackoverflow.

I'm looking to do value equality comparison on aggregate types (arrays and
structs), and want to have special handling for when they are constant for
two use cases:

- Creating only a single global constant instead of several when their
values are equal and won't be modified

- Optimizing the value equality operation when both operands are constant

This is trivial with ConstantExpr::getICmp and ConstantExpr::getFCmp for
primitive types, and seems straight-forward to do recursively for structs
and arrays. So I could roll my own but I'm sure this has been done already?

However I can't find any standard implementation, can someone point me in
the right direction?

Thanks,
/Christer
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