Peter Rong ee31a4a702 [ARM] IselLowering unsigned overflow to crash using APInt in PerformSHLSimplify ...

This diff fixes issue https://github.com/llvm/llvm-project/issues/59317

We should check if bitwidth is lower than the shift amount before we subtract them to avoid unsigned overflow.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D139238

2022-12-06 09:58:27 -08:00

836 KiB

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