Merge commit '45bd85e48152' from llvm.org/main into next

Author: git apple-llvm automerger

clang/lib/AST/Interp/ByteCodeExprGen.cpp

@@ -212,6 +212,13 @@ bool ByteCodeExprGen<Emitter>::VisitCastExpr(const CastExpr *CE) {
     if (!this->visit(SubExpr))
       return false;
 
+    // If SubExpr doesn't result in a pointer, make it one.
+    if (PrimType FromT = classifyPrim(SubExpr->getType()); FromT != PT_Ptr) {
+      assert(isPtrType(FromT));
+      if (!this->emitDecayPtr(FromT, PT_Ptr, CE))
+        return false;
+    }
+
     PrimType T = classifyPrim(CE->getType());
     if (T == PT_IntAP)
       return this->emitCastPointerIntegralAP(Ctx.getBitWidth(CE->getType()),

clang/test/AST/Interp/c.c

@@ -263,3 +263,10 @@ const int *p = &b;
 const __int128 K = (__int128)(int*)0;
 const unsigned __int128 KU = (unsigned __int128)(int*)0;
 #endif
+
+
+int test3(void) {
+  int a[2];
+  a[0] = test3; // all-error {{incompatible pointer to integer conversion assigning to 'int' from 'int (void)'}}
+  return 0;
+}