llvm-project

adfe8697 - [RegisterCoalescer] Fix crash coalescing COPY from erasable IMPLICIT_DEF (#196895)

[RegisterCoalescer] Fix crash coalescing COPY from erasable IMPLICIT_DEF (#196895) When a CR_Erase value's source is an erasable IMPLICIT_DEF, discard the endpoint from pruneValue instead of adding it to EndPoints, and mark any full-register DstReg uses with no live coverage as undef in updateRegDefsUses. Fixes: https://github.com/llvm/llvm-project/issues/195587.