llvm-project

ca2e8fc9 - Update callers of isTriviallyReMaterializable to check trivialness (#160319)

Update callers of isTriviallyReMaterializable to check trivialness (#160319) This is a preparatory change for an upcoming reorganization of our rematerialization APIs. Despite the interface being documented as "trivial" (meaning no virtual register uses on the instruction being considered for remat), our actual implementation inconsistently supports non-trivial remat, and certain backends (AMDGPU and RISC-V mostly) lie about instructions being trivial to abuse that. We want to allow non-triial remat more broadly, but first we need to do some cleanup to make it understandable what's going on. These three call sites are ones which appear to actually want the trivial definition, and appear fairly low risk to change. p.s. I'm deliberately *not* updating any APIs in this change, I'm going to do that as a followup once it's clear which category each callsite fits in.