Matthias Braun 26e7ea6267 MachineCSE: Clear dead-def flag on CSE. ...

In case CSE reuses a previoulsy unused register the dead-def flag has to
be cleared on the def operand, as exposed by the arm64-cse.ll test.

This fixes PR22439 and the corresponding rdar://19694987

Differential Revision: http://reviews.llvm.org/D7395

llvm-svn: 228178

2015-02-04 19:35:16 +00:00

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