[PATCH] Fix R0 use in PowerPC VSX store for FastIsel

[hfinkel at anl.gov]

There are various places where we call:

  MRI.setRegClass(SomeReg, &PPC::GPRC_and_GPRC_NOR0RegClass);

to adjust for this issue. Does calling that on IndexReg help? I suppose I don't understand exactly what's going on here? Is it generally legal to call MIBuilder::addReg with an invalid register operand?


http://reviews.llvm.org/D8358

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