ARM LDM/STM system instruction variants.

rdar://10550269

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146519 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 643ba71..745fa89 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -2666,7 +2666,15 @@
     return Error(E, "'}' expected");
   Parser.Lex(); // Eat '}' token.
 
+  // Push the register list operand.
   Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
+
+  // The ARM system instruction variants for LDM/STM have a '^' token here.
+  if (Parser.getTok().is(AsmToken::Caret)) {
+    Operands.push_back(ARMOperand::CreateToken("^",Parser.getTok().getLoc()));
+    Parser.Lex(); // Eat '^' token.
+  }
+
   return false;
 }