David Sherwood a3e3986be1 [SVE] Fix ubsan issues in DecodeIITType ...

In an earlier patch I removed the need for
IITDescriptor::ScalableVecArgument, which involved changing
DecodeIITType to pull out the last IIT_Info from the list. However,
it turns out this is unsafe and causes ubsan failures. I've tried to
fix this a different way by simply passing the last IIT_Info as an
additional argument to DecodeIITType.

Differential Revision: https://reviews.llvm.org/D81057

2020-06-04 07:58:24 +01:00

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