Simon Pilgrim

Thanks Chris, I've made an upstream cmake feature request here: https://gitlab.kitware.com/cmake/cmake/issues/18405 I'll try using cmake directly at some point as well

@Kojoley So can we enable it when building with cmake >= 3.27?

Maybe HandleLLVMOptions.cmake?

Good first issue for somebody working on windows + visualstudio and knows a little cmake

> > This patch proposes we drop the opt-in limit for opcodes that are allowed to push a freeze through the op to freeze all its operands, bringing us more...

> List looks totally arbitrary so Agreed - and it doesn't even seem to be to reduce freeze node counts as ISD::BUILD_VECTOR was allowed to always push and is one...

Any more comments before I commit? I've added riscv-specific handling for the insert_subvector(freeze(undef),sub,idx) regression - at this point I think I've cleaned up the notable regressions.

Sure - to save me time please can you create a llc-only repro?

CC @mshockwave

We're going to need to extract the opcode, `m_AnyBinOp(unsigned &Opcode, const LHS &L, const RHS &R)` maybe?