Biubiubiu12 commented on code in PR #15274:
URL: https://github.com/apache/tvm/pull/15274#discussion_r1271697422
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src/tir/schedule/primitive/blockize_tensorize.cc:
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@@ -565,58 +569,230 @@ StmtSRef Blockize(ScheduleState self, const StmtSRef&
loop_sref, bool preserve_u
return result;
}
-BlockRealize BlockizeBlocks(const ScheduleState& self, const Array<StmtSRef>&
block_srefs,
- const StmtSRef& lca, Map<Block, Block>*
block_sref_reuse,
- bool preserve_unit_iters) {
+class CollectSubstInfo : public StmtVisitor {
+ public:
+ static void Collect(const ScheduleState& self, const StmtSRef& lca, const
StmtSRef& block_sref,
+ Array<IterVar>* outer_iter_vars, Array<PrimExpr>*
outer_bindings,
+ Map<Var, PrimExpr>* block_var_subst) {
+ CollectSubstInfo collector(self, lca, outer_iter_vars, outer_bindings,
block_var_subst);
+ StmtSRef scope_root = tir::GetScopeRoot(self, block_sref,
/*require_stage_pipeline=*/false);
+ const BlockNode* root_block = scope_root->StmtAs<BlockNode>();
+ Block block = GetRef<Block>(root_block);
+ return collector(block);
+ }
+
+ private:
+ explicit CollectSubstInfo(const ScheduleState& self, const StmtSRef& lca,
+ Array<IterVar>* outer_iter_vars, Array<PrimExpr>*
outer_bindings,
+ Map<Var, PrimExpr>* block_var_subst)
+ : self_(self),
+ lca_(lca),
+ outer_iter_vars_(outer_iter_vars),
+ outer_bindings_(outer_bindings),
+ block_var_subst_(block_var_subst) {}
+
+ void VisitStmt_(const ForNode* loop) final {
+ if (!in_lca) {
+ if (loop == lca_->stmt) {
+ in_lca = true;
+ }
+ outer_bindings_->push_back(loop->loop_var);
+ out_extent.push_back(loop->extent);
+ // traverse lca
+ ++num_travered;
+ StmtVisitor::VisitStmt(loop->body);
+ --num_travered;
+ if (!in_lca) {
Review Comment:
No, in the recursive process of StmtVisitor::VisitStmt(loop->body), in_lca
may become true in "condition with line 595", and the information of
xx.push_back(loop->extent) will not be xx.pop_back(), you can think of it as a
stack.
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