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2011 Apr 07
1
[LLVMdev] IMPLICIT_DEF?
Hi,
I have a MachineInstr that writes to a subreg, but clobbers the superreg.
How should I BuildMI this instruction?
I try to do a
IMPLICIT_DEF super_reg
and then write to a subreg of that super register
, but it gets DCE:ed.
Is there a way to express this clobbering of a superregister?
thanks,
Jonas
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