[llvm] r358066 - MCDwarf: use write_zeroes for MCDwarfLineAddr::FixedEncode

[Fangrui Song via llvm-commits]

Author: maskray
Date: Wed Apr 10 02:41:48 2019
New Revision: 358066

URL: http://llvm.org/viewvc/llvm-project?rev=358066&view=rev
Log:
MCDwarf: use write_zeroes for MCDwarfLineAddr::FixedEncode

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

Modified:
    llvm/trunk/lib/MC/MCDwarf.cpp

Modified: llvm/trunk/lib/MC/MCDwarf.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCDwarf.cpp?rev=358066&r1=358065&r2=358066&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCDwarf.cpp (original)
+++ llvm/trunk/lib/MC/MCDwarf.cpp Wed Apr 10 02:41:48 2019
@@ -758,9 +758,7 @@ bool MCDwarfLineAddr::FixedEncode(MCCont
     *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.