Optimize NumericLiteralParser::GetIntegerValue().

It does a conservative estimate on the size of numbers that can fit into
uint64_t.  This bound is improved.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164624 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed