[llvm] [GVN] Improve processBlock for instruction erasure (PR #131753)

[Madhur Amilkanthwar via llvm-commits]

madhur13490 wrote:

> Could you provide more details on the motivation for this change? Is it just to resolve the FIXME or something else?
yes, primarily FIXME. Nothing else as such which motivates. The change is an optimization in the process of handling instructions by avoiding vector population just for the erasure.

> It looks like the stack-layout-remark.c clang test crashes.
Fixed in the current revision. Thanks!


https://github.com/llvm/llvm-project/pull/131753