Jakob Stoklund Olesen 4864a81aa3 Improve sub-register def handling in ProcessImplicitDefs. ...

This boils down to using MachineOperand::readsReg() more.

This fixes PR11829 where a use ended up after the first def when
lowering REG_SEQUENCE instructions involving IMPLICIT_DEFs.

llvm-svn: 148996

2012-01-25 23:36:27 +00:00

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