The register constraint could mean a 16- or 8-bit register.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167735 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index ea4ac27..af0e043 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2603,7 +2603,7 @@
     case 'b':
     case 'c':
     case 'd':
-      return Size == 32;
+      return Size <= 32;
     }
 
     return true;