A signed bitfield's range is [-1,0], so assigning 1 is technically an…

… overflow. However, the other bitfield requires a signed value (it supports negative offsets), so it is slightly better to retain a signed 1-bit bitfield and use -1 instead of 1. Silences an MSVC warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260973 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/CodeViewDebug.cpp

@@ -495,7 +495,7 @@ void CodeViewDebug::emitDebugInfoForFunction(const Function *GV,
 CodeViewDebug::LocalVarDefRange
 CodeViewDebug::createDefRangeMem(uint16_t CVRegister, int Offset) {
   LocalVarDefRange DR;
-  DR.InMemory = 1;
+  DR.InMemory = -1;
   DR.DataOffset = Offset;
   assert(DR.DataOffset == Offset && "truncation");
   DR.StructOffset = 0;