Displaying 2 results from an estimated 2 matches for "03e7749e".
2012 Jan 19
0
[LLVMdev] register allocation
...register pairing. That would be PBQP, right?
If by pairing you mean GCC's multiple-alternatives, then PBQP should be able to support that.
/jakob
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2012 Jan 19
3
[LLVMdev] register allocation
Hi,
My target has special requirements during register allocation - there is both a need to handle register pairing and to never spill a flag result reg-class (which might happen at -O0 for no obvious reason).
Since neither of these issues seems to be supported, I have tried to pre-allocate these registers in the preRA pass. This has resulted in "using undefined physical register"