masahi commented on a change in pull request #8466:
URL: https://github.com/apache/tvm/pull/8466#discussion_r672235542
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File path: src/tir/transforms/split_host_device.cc
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@@ -89,6 +92,17 @@ class VarUseDefAnalysis : public StmtExprMutator {
Stmt VisitStmt_(const AllocateNode* op) final {
this->HandleDef(op->buffer_var.get());
+ auto storage_scope =
runtime::StorageScope::Create(GetPtrStorageScope(op->buffer_var));
+ if (storage_scope.rank == runtime::StorageRank::kDynShared) {
+ ICHECK_EQ(use_dyn_shmem_, false) << "Only one dynamic shared memory
allocation is allowed.";
Review comment:
One possible solution is to rewrite the above program to
```
extern __shared__ char buf[SIZE];
*((floa32*)&buf[256]) = ((half*)&buf[0])[0] * ((half*)&buf[128])[0];
```
And introduce two intrinsics, `reinterpret_load` / `reinterpret_store`,
which can be used to express the snippet above by
```
extern __shared__ char buf[SIZE];
reinterpret_store(&buf[256], "float32", 0,
reinterpret_load(&buf[0], "half", 0) * reinterpret_load(&buf[128], "half",
0));
```
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