Use numeric_limits instead of LLONG_MAX

[arsenm]

Summary

This is a build fix for configurations where LLONG_MAX is not defined in system headers.

[arsenm]

ping

[arsenm]

ping

[jroelofs]

LGTM

[arsenm]

r250946

lib/DebugInfo/DWARF/DWARFFormValue.cpp

 #include "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
 #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Dwarf.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cassert>
-#include <climits>
+#include <limits>
 using namespace llvm;
 using namespace dwarf;
 using namespace syntax;
 
 namespace {
 uint8_t getRefAddrSize(uint8_t AddrSize, uint16_t Version) {
   // FIXME: Support DWARF64.
   return (Version == 2) ? AddrSize : 4;
Optional<uint64_t> DWARFFormValue::getAsUnsignedConstant() const {
   if ((!isFormClass(FC_Constant) && !isFormClass(FC_Flag))
       || Form == DW_FORM_sdata)
     return None;
   return Value.uval;
 }
 
 Optional<int64_t> DWARFFormValue::getAsSignedConstant() const {
   if ((!isFormClass(FC_Constant) && !isFormClass(FC_Flag)) ||
-      (Form == DW_FORM_udata && uint64_t(LLONG_MAX) < Value.uval))
+      (Form == DW_FORM_udata && uint64_t(std::numeric_limits<int64_t>::max()) < Value.uval))
     return None;
   switch (Form) {
   case DW_FORM_data4:
     return int32_t(Value.uval);
   case DW_FORM_data2:
     return int16_t(Value.uval);
   case DW_FORM_data1:
     return int8_t(Value.uval);