StringRef lowerRef(lowerCase);
unsigned regID = MatchRegisterName(lowerRef);
+ // Check for register aliases.
+ // r13 -> sp
+ // r14 -> lr
+ // r15 -> pc
+ // ip -> r12
+ // FIXME: Some assemblers support lots of others. Do we want them all?
+ if (!regID) {
+ if (lowerCase.size() == 3 && lowerCase[0] == 'r'
+ && lowerCase[1] == '1') {
+ switch (lowerCase[2]) {
+ default: break;
+ case '3': regID = ARM::SP;
+ case '4': regID = ARM::LR;
+ case '5': regID = ARM::PC;
+ }
+ } else if (lowerCase == "ip")
+ regID = ARM::R12;
+ }
if (regID) {
return AsmToken(AsmToken::Register,