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2012 Mar 30
1
[LLVMdev] VLIWPacketizerList: failing to schedule terminators
...ring postRA passes only. > > VLIWPacketizer calls finalizeBundle explicitly because it's running after regalloc. > > We do not want to see any Bundle instructions prior to regalloc. So a preRA scheduler should not call finalizeBundles. It can create bundles simply by setting the isInsideBundle flag on MachineInstrs. If you allow internal register dependencies you would also need to set isInternalRead on those MachineOperands. > Thanks, this information is really helpful. One question, though: If preRA bundles can't have Bundle instructions, then how does the register allocator...