Lang Hames d5862ce317 Make the peephole optimizer clear kill flags on a vreg if it's about to add new ...

uses of the vreg, since the old kills may no longer be valid.  This was causing
-verify-machineinstrs to complain about uses after kills, and could potentially
have been causing subtle register allocation issues, but I haven't come across a
test case yet.

llvm-svn: 151425

2012-02-25 02:01:00 +00:00

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