From e6b8320c0a634ba60c82693c6631ea90fb2988a6 Mon Sep 17 00:00:00 2001
From: Wei Wang <apollo.mobility@gmail.com>
Date: Mon, 3 May 2021 15:43:39 -0700
Subject: [clang][AST] Improve AST Reader/Writer memory footprint

Reduce memory footprint of AST Reader/Writer:
1. Adjust internal data containers' element type.
2. Switch to set for deduplication of deferred diags.

Differential Revision: https://reviews.llvm.org/D101793
---
 clang/lib/Sema/MultiplexExternalSemaSource.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'clang/lib/Sema/MultiplexExternalSemaSource.cpp')

diff --git a/clang/lib/Sema/MultiplexExternalSemaSource.cpp b/clang/lib/Sema/MultiplexExternalSemaSource.cpp
index 3a993e2..0727756 100644
--- a/clang/lib/Sema/MultiplexExternalSemaSource.cpp
+++ b/clang/lib/Sema/MultiplexExternalSemaSource.cpp
@@ -268,7 +268,7 @@ void MultiplexExternalSemaSource::ReadExtVectorDecls(
 }
 
 void MultiplexExternalSemaSource::ReadDeclsToCheckForDeferredDiags(
-    llvm::SmallVector<Decl *, 4> &Decls) {
+    llvm::SmallSetVector<Decl *, 4> &Decls) {
   for(size_t i = 0; i < Sources.size(); ++i)
     Sources[i]->ReadDeclsToCheckForDeferredDiags(Decls);
 }
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