[llvm] [SandboxIR] Implement AllocaInst (PR #102027)

[Thorsten Schütt via llvm-commits]

================
@@ -1212,6 +1212,80 @@ static llvm::Instruction::CastOps getLLVMCastOp(Instruction::Opcode Opc) {
   }
 }
 
+AllocaInst *AllocaInst::create(Type *Ty, unsigned AddrSpace, BBIterator WhereIt,
+                               BasicBlock *WhereBB, Context &Ctx,
+                               Value *ArraySize, const Twine &Name) {
+  auto &Builder = Ctx.getLLVMIRBuilder();
+  if (WhereIt == WhereBB->end())
+    Builder.SetInsertPoint(cast<llvm::BasicBlock>(WhereBB->Val));
+  else
+    Builder.SetInsertPoint((*WhereIt).getTopmostLLVMInstruction());
+  auto *NewAlloca = Builder.CreateAlloca(Ty, AddrSpace, ArraySize->Val, Name);
+  return Ctx.createAllocaInst(NewAlloca);
+}
+
+AllocaInst *AllocaInst::create(Type *Ty, unsigned AddrSpace,
+                               Instruction *InsertBefore, Context &Ctx,
+                               Value *ArraySize, const Twine &Name) {
+  return create(Ty, AddrSpace, InsertBefore->getIterator(),
+                InsertBefore->getParent(), Ctx, ArraySize, Name);
+}
+
+AllocaInst *AllocaInst::create(Type *Ty, unsigned AddrSpace,
+                               BasicBlock *InsertAtEnd, Context &Ctx,
+                               Value *ArraySize, const Twine &Name) {
+  return create(Ty, AddrSpace, InsertAtEnd->end(), InsertAtEnd, Ctx, ArraySize,
+                Name);
+}
+
+void AllocaInst::setAllocatedType(Type *Ty) {
+  auto &Tracker = Ctx.getTracker();
+  if (Tracker.isTracking())
+    Tracker.track(std::make_unique<AllocaSetAllocatedType>(
+        cast<AllocaInst>(this), Tracker));
----------------
tschuett wrote:

I may be blind, but why is this not a AllocaInst?

https://github.com/llvm/llvm-project/pull/102027