llvm

40b912c7 - LLVM 20: Update for getFirstNonPHIOrDbg.

LLVM 20: Update for getFirstNonPHIOrDbg. LLVM 20 updates getFirstNonPHIOrDbg() to return an iterator rather than an Instruction *. We can use &* to reliably get an Instruction * across LLVM versions. The variable name insert_point suggests that we should instead change the type of the variable to be an iterator, but despite the name, it is not used merely as an insert point. This should be revisited in the future but may result in changes in behavior that should probably be kept separate from any compatibility fixes.