r332675 - Support: Add a raw_ostream::write_zeros() function. NFCI.

[Peter Collingbourne via cfe-commits]

Author: pcc
Date: Thu May 17 15:11:43 2018
New Revision: 332675

URL: http://llvm.org/viewvc/llvm-project?rev=332675&view=rev
Log:
Support: Add a raw_ostream::write_zeros() function. NFCI.

This will eventually replace MCObjectWriter::WriteZeros.

Part of PR37466.

Differential Revision: https://reviews.llvm.org/D47033

Modified:
    cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp

Modified: cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp?rev=332675&r1=332674&r2=332675&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp (original)
+++ cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp Thu May 17 15:11:43 2018
@@ -1372,8 +1372,7 @@ void CoverageMappingModuleGen::emit() {
   // and coverage mappings is a multiple of 8.
   if (size_t Rem = OS.str().size() % 8) {
     CoverageMappingSize += 8 - Rem;
-    for (size_t I = 0, S = 8 - Rem; I < S; ++I)
-      OS << '\0';
+    OS.write_zeros(8 - Rem);
   }
   auto *FilenamesAndMappingsVal =
       llvm::ConstantDataArray::getString(Ctx, OS.str(), false);