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It's not too much of a problem then. I can make a DenseMap between the registers and my registers. It's just one more intermediate step for a lookup. I wish to mimic all the of the registers on the machine with my std::vector<RegisterInfo> RegisterIndexes; vector. Then when a register is used I can assign it easily. I know about alias register and those are taken care of ever so cleverly. If this can be done without an extra lookup, it would improve performance. I have one too many as is in some parts. Thanks, Jeff Kunkel On Fri, Sep 3, 2010 at...

...10:46 AM, Jeff Kunkel wrote: > It's not too much of a problem then. I can make a DenseMap between the registers and my registers. It's just one more intermediate step for a lookup. > > I wish to mimic all the of the registers on the machine with my std::vector<RegisterInfo> RegisterIndexes; vector. Then when a register is used I can assign it easily. I know about alias register and those are taken care of ever so cleverly. Is this because you want to control the order in which the physical registers are allocated? If so, it'll normally be better to use the TargetRegisterClas...

TargetRegisterInfo::getNumRegs(). Generally, it's best not to make any assumptions about the internal ordering or numbering if you can avoid it. What are you looking to do? -Jim On Sep 3, 2010, at 9:37 AM, Jeff Kunkel wrote: > How do I get the total number of machine registers? I have currently a MachineFunction and some derivatives. > > How are the machine registers ordered

How do I get the total number of machine registers? I have currently a MachineFunction and some derivatives. How are the machine registers ordered internally? Can I index them off of a zero based array or do I have to create a map to have them be zero based? Thanks, Jeff Kunkel -------------- next part -------------- An HTML attachment was scrubbed... URL: