Recognize 0X and 0B as a valid radix characters.

[sidneym]

Summary

llvm-mc doesn't recognize the upper case equivalents of 0x# and 0b#.

[colinl]

LGTM

llvm/trunk/lib/MC/MCParser/AsmLexer.cpp

if (CurPtr[-1] != '0' || CurPtr[0] == '.') {
 
     // The darwin/x86 (and x86-64) assembler accepts and ignores type
     // suffices on integer literals.
     SkipIgnoredIntegerSuffix(CurPtr);
 
     return intToken(Result, Value);
   }
 
-  if (*CurPtr == 'b') {
+  if ((*CurPtr == 'b') || (*CurPtr == 'B')) {
     ++CurPtr;
     // See if we actually have "0b" as part of something like "jmp 0b\n"
     if (!isdigit(CurPtr[0])) {
       --CurPtr;
       StringRef Result(TokStart, CurPtr - TokStart);
       return AsmToken(AsmToken::Integer, Result, 0);
     }
     const char *NumStart = CurPtr;
if ((*CurPtr == 'b') || (*CurPtr == 'B')) {
 
     // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
     // suffixes on integer literals.
     SkipIgnoredIntegerSuffix(CurPtr);
 
     return intToken(Result, Value);
   }
 
-  if (*CurPtr == 'x') {
+  if ((*CurPtr == 'x') || (*CurPtr == 'X')) {
     ++CurPtr;
     const char *NumStart = CurPtr;
     while (isxdigit(CurPtr[0]))
       ++CurPtr;
 
     // "0x.0p0" is valid, and "0x0p0" (but not "0xp0" for example, which will be
     // diagnosed by LexHexFloatLiteral).
     if (CurPtr[0] == '.' || CurPtr[0] == 'p' || CurPtr[0] == 'P')

llvm/trunk/lib/Support/StringRef.cpp

if (N > Length)
     return 0;
   for (size_t i = 0, e = Length - N + 1; i != e; ++i)
     if (substr(i, N).equals(Str))
       ++Count;
   return Count;
 }
 
 static unsigned GetAutoSenseRadix(StringRef &Str) {
-  if (Str.startswith("0x")) {
+  if (Str.startswith("0x") || Str.startswith("0X")) {
     Str = Str.substr(2);
     return 16;
   }
   
-  if (Str.startswith("0b")) {
+  if (Str.startswith("0b") || Str.startswith("0B")) {
     Str = Str.substr(2);
     return 2;
   }
 
   if (Str.startswith("0o")) {
     Str = Str.substr(2);
     return 8;
   }

llvm/trunk/test/MC/AsmParser/uppercase-hex.s

+# RUN: llvm-mc -triple i386-unknown-unknown %s | FileCheck %s
+
+foo:
+.short  0X1
+# CHECK: .short 1
+.short  0B1
+# CHECK: .short 1