From 1d88b25399d37de542383934ac97cc7cf0c4fef4 Mon Sep 17 00:00:00 2001
From: Fangrui Song <maskray@google.com>
Date: Wed, 10 Apr 2019 09:41:48 +0000
Subject: [PATCH] MCDwarf: use write_zeroes for MCDwarfLineAddr::FixedEncode

This is more efficient than allocating a std::vector<uint8_t>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358066 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/MC/MCDwarf.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index ea2cb577661..f59d91d5c62 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -758,9 +758,7 @@ bool MCDwarfLineAddr::FixedEncode(MCContext &Context,
     *Offset = OS.tell();
     *Size = AddrSize;
     SetDelta = false;
-    std::vector<uint8_t> FillData;
-    FillData.insert(FillData.begin(), AddrSize, 0);
-    OS.write(reinterpret_cast<char *>(FillData.data()), AddrSize);
+    OS.write_zeros(AddrSize);
   } else {
     OS << char(dwarf::DW_LNS_fixed_advance_pc);
     // Generate fixup for 2-bytes address delta.
-- 
2.50.1