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earl
2013 Feb 02
1
[LLVMdev] Trouble with instructions for lowering load/store.
...registers in RegisterClass).
Often it's one or two registers. I don't understand how use
ComplexPattern in this case. But if I don't use ComplexPattern I'll have
other problems - not all instruction can select in InstructionSelection
pass.
My work place here: https://github.com/earl1k/llvm-z80
Example of some load instructions for Z80 CPU with opcode:
Opcode Instruction node pattern
0x46 LD $dst,(HL) (set GR8:$dst, (load HL))
0x0A LD A,(BC) (set A, (load BC))
0x1A LD A,(DE) (set A, (load...