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Hi Evan, I just read your proposal and the following discussion for VLIW support and want to share my experience of writing a VLIW back-end for LLVM. I would not integrate the packetizer into the register allocator super class since it would reduce the flexibility for the back-end developer to add some optimization passes after the packetizer. Instead, I would add the packetizer as a separate

Machine Instruction Bundle in LLVM Hi all, There have been quite a bit of discussions about adding machine instruction bundle to support VLIW targets. I have been pondering what the right representation should be and what kind of impact it might have on the LLVM code generator. I believe I have a fairly good plan now and would like to share with the LLVM community. Design Criteria 1. The