https://github.com/hokein created https://github.com/llvm/llvm-project/pull/142840
This increases clang's template instantiation depths. I can see 7% increase (1510 -> 1612 on my local machine) for the `clang/test/SemaTemplate/instantiation-depth-default.cpp` case. No performance regressions have been observed: https://llvm-compile-time-tracker.com/compare.php?from=5f8cf33650c0c71119ecf81f07014329d9466d0d&to=05c2403b0f784325f5b88760ef43a15b6aaf4181&stat=instructions:u >From 05c2403b0f784325f5b88760ef43a15b6aaf4181 Mon Sep 17 00:00:00 2001 From: Haojian Wu <hokein...@gmail.com> Date: Wed, 4 Jun 2025 14:54:37 +0200 Subject: [PATCH] Reduce LateInstantiatedAttrVec vector size. --- clang/include/clang/Sema/Sema.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h index 84d30561fecde..25246374a3c36 100644 --- a/clang/include/clang/Sema/Sema.h +++ b/clang/include/clang/Sema/Sema.h @@ -14015,7 +14015,7 @@ class Sema final : public SemaBase { Decl *D) : TmplAttr(A), Scope(S), NewDecl(D) {} }; - typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; + typedef SmallVector<LateInstantiatedAttribute, 1> LateInstantiatedAttrVec; void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, const Decl *Pattern, Decl *Inst, _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
