[llvm] [VPlan] Add VPIRInstruction, use for exit block live-outs. (PR #100735)

[Florian Hahn via llvm-commits]

================
@@ -855,10 +855,18 @@ VPlan::~VPlan() {
     delete BackedgeTakenCount;
 }
 
+static VPIRBasicBlock *createVPIRBasicBlockFor(BasicBlock *BB) {
+  auto *VPIRBB = new VPIRBasicBlock(BB);
+  for (Instruction &I :
+       make_range(BB->begin(), BB->getTerminator()->getIterator()))
----------------
fhahn wrote:

> For now, suffice to wrap (lcssa) phi's and last non-terminal instruction, but easier to fully populate with all instructions excluding terminal?

Yes, only partially populating would probably be a bit more logic to skip undesired parts. Not adding the branches also have the benefit that we don't remove the original terminator VPIRI from the middle block when adding the VPlan-modeled branch recipes.

https://github.com/llvm/llvm-project/pull/100735