Handle the 'e' constraint. Fixes PR3385

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62923 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/asm.c b/test/Sema/asm.c
index 4093b1a..fa9b125 100644
--- a/test/Sema/asm.c
+++ b/test/Sema/asm.c
@@ -54,3 +54,9 @@
 {
   asm("nop" : : "X" (8)); 
 }
+
+// PR3385
+void test6(long i)
+{
+  asm("nop" : : "er"(i));
+}
\ No newline at end of file