Added sanity check for obviously bogus immediates

llvm-svn: 28359
diff --git a/llvm/lib/Target/Alpha/AlphaAsmPrinter.cpp b/llvm/lib/Target/Alpha/AlphaAsmPrinter.cpp
index 8c597e4..7b446a4 100644
--- a/llvm/lib/Target/Alpha/AlphaAsmPrinter.cpp
+++ b/llvm/lib/Target/Alpha/AlphaAsmPrinter.cpp
@@ -82,6 +82,7 @@
     O << TM.getRegisterInfo()->get(MO.getReg()).Name;
   } else if (MO.isImmediate()) {
     O << MO.getImmedValue();
+    assert(MO.getImmedValue() < (1 << 30));
   } else {
     printOp(MO);
   }