[llvm] [VPlan] Move auxiliary declarations out of VPlan.h (NFC). (PR #124104)

[Alexey Bataev via llvm-commits]

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@@ -39,6 +42,58 @@ using namespace llvm;
 // Number of levels to look ahead when re-ordering multi node operands.
 static unsigned LookaheadMaxDepth = 5;
 
+void VPInterleavedAccessInfo::visitRegion(VPRegionBlock *Region,
+                                          Old2NewTy &Old2New,
+                                          InterleavedAccessInfo &IAI) {
+  ReversePostOrderTraversal<VPBlockShallowTraversalWrapper<VPBlockBase *>> RPOT(
+      Region->getEntry());
+  for (VPBlockBase *Base : RPOT) {
+    visitBlock(Base, Old2New, IAI);
+  }
+}
+
+void VPInterleavedAccessInfo::visitBlock(VPBlockBase *Block, Old2NewTy &Old2New,
+                                         InterleavedAccessInfo &IAI) {
+  if (VPBasicBlock *VPBB = dyn_cast<VPBasicBlock>(Block)) {
+    for (VPRecipeBase &VPI : *VPBB) {
+      if (isa<VPWidenPHIRecipe>(&VPI))
+        continue;
+      assert(isa<VPInstruction>(&VPI) && "Can only handle VPInstructions");
+      auto *VPInst = cast<VPInstruction>(&VPI);
+
+      auto *Inst = dyn_cast_or_null<Instruction>(VPInst->getUnderlyingValue());
+      if (!Inst)
+        continue;
+      auto *IG = IAI.getInterleaveGroup(Inst);
+      if (!IG)
+        continue;
+
+      auto NewIGIter = Old2New.find(IG);
+      if (NewIGIter == Old2New.end())
+        Old2New[IG] = new InterleaveGroup<VPInstruction>(
+            IG->getFactor(), IG->isReverse(), IG->getAlign());
+
+      if (Inst == IG->getInsertPos())
+        Old2New[IG]->setInsertPos(VPInst);
+
+      InterleaveGroupMap[VPInst] = Old2New[IG];
+      InterleaveGroupMap[VPInst]->insertMember(
+          VPInst, IG->getIndex(Inst),
+          Align(IG->isReverse() ? (-1) * int(IG->getFactor())
+                                : IG->getFactor()));
+    }
+  } else if (VPRegionBlock *Region = dyn_cast<VPRegionBlock>(Block))
+    visitRegion(Region, Old2New, IAI);
+  else
+    llvm_unreachable("Unsupported kind of VPBlock.");
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alexey-bataev wrote:

Add braces

https://github.com/llvm/llvm-project/pull/124104