From ac590673637ebac0a6ac530e5130f282f82d03cf Mon Sep 17 00:00:00 2001
From: Fangrui Song <maskray@google.com>
Date: Wed, 10 Apr 2019 09:41:48 +0000
Subject: MCDwarf: use write_zeroes for MCDwarfLineAddr::FixedEncode

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

llvm-svn: 358066
---
 llvm/lib/MC/MCDwarf.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'llvm/lib/MC/MCDwarf.cpp')

diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index ea2cb577661..f59d91d5c62 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/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.
-- 
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