git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160286
91177308-0d34-0410-b5e6-
96231b3b80d8
bool NeedsQuotes = isdigit(Name[0]);
if (!NeedsQuotes) {
for (unsigned i = 0, e = Name.size(); i != e; ++i) {
- char C = Name[i];
+ // By making this unsigned, the value passed in to isalnum will always be
+ // in the range 0-255. This is important when building with MSVC because
+ // its implementation will assert. This situation can arise when dealing
+ // with UTF-8 multibyte characters.
+ unsigned char C = Name[i];
if (!isalnum(C) && C != '-' && C != '.' && C != '_') {
NeedsQuotes = true;
break;