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1024104
2012 Sep 05
5
[LLVMdev] 64 bit special purpose registers
Micah,
Do you mean we should make GPR64 available to register allocator by calling
addRegisterClass?
addRegisterClass(MVT::i64, &GPR64RegClass)
If we add register class GPR64, type legalization will stop expanding i64
operations because i64 is now a legal type.
Then we will probably have to write lots of code to custom-lower
unsupported 64-bit operations during legalization. Note that