Recognize alternative register names like ip -> r12.
Fixes <rdar://problem/8857982>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123409 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index d849fa5..a34fdb6 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -24,6 +24,7 @@
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
using namespace llvm;
@@ -495,9 +496,19 @@
// FIXME: Validate register for the current architecture; we have to do
// validation later, so maybe there is no need for this here.
- unsigned RegNum = MatchRegisterName(Tok.getString());
- if (RegNum == 0)
- return -1;
+ std::string upperCase = Tok.getString().str();
+ std::string lowerCase = LowercaseString(upperCase);
+ unsigned RegNum = MatchRegisterName(lowerCase);
+ if (!RegNum) {
+ RegNum = StringSwitch<unsigned>(lowerCase)
+ .Case("r13", ARM::SP)
+ .Case("r14", ARM::LR)
+ .Case("r15", ARM::PC)
+ .Case("ip", ARM::R12)
+ .Default(0);
+ }
+ if (!RegNum) return -1;
+
Parser.Lex(); // Eat identifier token.
return RegNum;
}