[TableGen] Fix leaking of PhysRegInputs.

Instead of dynamically allocating the vector for PhysRegs, we can
allocate it on the stack and move it into InstructionMemo.

Reviewers: mcrosier, craig.topper, RKSimon, dsanders

Reviewed By: dsanders

Differential Revision: https://reviews.llvm.org/D47461


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333438 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed