From bf4fa3036aec8a6b41431d1e4e4fd3e7e52c4482 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Thu, 16 Dec 2021 21:07:39 -0800
Subject: [PATCH] [ELF] Use SmallVector for MergeInputSection::pieces. NFC

sizeof(pieces) decreases from 24 to 16 on ELF64.
One BumpPtrAllocator can store more MergeInputSections.
The lld executable becomes smaller.
---
 lld/ELF/InputSection.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lld/ELF/InputSection.h b/lld/ELF/InputSection.h
index 7ddc43916a0f..70bbe4975a38 100644
--- a/lld/ELF/InputSection.h
+++ b/lld/ELF/InputSection.h
@@ -278,7 +278,7 @@ public:
 
   // Splittable sections are handled as a sequence of data
   // rather than a single large blob of data.
-  std::vector<SectionPiece> pieces;
+  SmallVector<SectionPiece, 0> pieces;
 
   // Returns I'th piece's data. This function is very hot when
   // string merging is enabled, so we want to inline.