1 files changed, 3 insertions, 1 deletions
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index d6312d6e5dc..3c076ca4f03 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -3364,6 +3364,8 @@ public:
   virtual bool validateConstraintModifier(StringRef Constraint,
                                           const char Modifier,
                                           unsigned Size) const {
+    bool isOutput = (Constraint[0] == '=');
+
     // Strip off constraint modifiers.
     while (Constraint[0] == '=' ||
            Constraint[0] == '+' ||
@@ -3375,7 +3377,7 @@ public:
     case 'r': {
       switch (Modifier) {
       default:
-        return Size == 32;
+        return (isOutput && Size >= 32) || Size <= 32;
       case 'q':
         // A register of size 32 cannot fit a vector type.
         return false;