implement the 'c' inline asm modifier character

llvm-svn: 31325
diff --git a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
index d6199dc..4e47b6a 100755
--- a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -399,6 +399,9 @@
     
     switch (ExtraCode[0]) {
     default: return true;  // Unknown modifier.
+    case 'c': // Don't print "$" before a global var name.
+      printOperand(MI, OpNo, "mem");
+      return false;
     case 'b': // Print QImode register
     case 'h': // Print QImode high register
     case 'w': // Print HImode register