[llvm] [SandboxVec][LoadStoreVec] Vectorize load seed chains (PR #215944)

[Anshil Gandhi via llvm-commits]

================
@@ -49,14 +50,31 @@ class LLVM_ABI LoadStoreVec final : public RegionPass {
   std::optional<Type *> canVectorize(ArrayRef<Instruction *> Bndl,
                                      Scheduler &Sched);
 
-  void tryEraseDeadInstrs(ArrayRef<Instruction *> Stores,
-                          ArrayRef<Value *> Operands);
+  /// Builds a single vector load out of the loads in \p Operands. \Returns
+  /// the new load, or nullptr if \p Operands are not a vectorizable load
+  /// chain.
+  Value *createVectorLoad(ArrayRef<Value *> Operands, Scheduler &Sched,
+                          const Analyses &A, Context &Ctx);
 
-  /// Tries to vectorize the load/store/constant ops chain \p Bndl
-  /// into a single vector store. \Returns whether it succeeded.
+  /// Flattens constant store operands in \p Operands (including vector and
----------------
gandhi56 wrote:

Hopefully it's clearer now.

https://github.com/llvm/llvm-project/pull/215944