Manish Kausik H e39c16b1d9 Ignore modified attribute list if it yields invalid IR ...

If modified attribute list is invalid, reverting the change is a
low-cost maintainence solution as compared to examples like
[this](https://github.com/llvm/llvm-project/blob/main/llvm/tools/bugpoint/CrashDebugger.cpp#L368).
This will ensure that the ListReducer maintains the sanctity of any
new attribute dependencies added in the future/already present.

Reviewed By: modocache

Differential Revision: https://reviews.llvm.org/D154348

2023-07-11 00:32:06 -04:00

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