Allow GC qualifiers to be added/removed by conversions from/to void*

without a warning.

llvm-svn: 128328

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index c2f3a434b81..dbddc384512 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -5803,6 +5803,12 @@ checkPointerTypesForAssignment(Sema &S, QualType lhsType, QualType rhsType) {
     if (lhq.getAddressSpace() != rhq.getAddressSpace())
       ConvTy = Sema::IncompatiblePointerDiscardsQualifiers;
 
+    // It's okay to add or remove GC qualifiers when converting to
+    // and from void*.
+    else if (lhq.withoutObjCGCAttr().compatiblyIncludes(rhq.withoutObjCGCAttr())
+             && (lhptee->isVoidType() || rhptee->isVoidType()))
+      ; // keep old
+
     // For GCC compatibility, other qualifier mismatches are treated
     // as still compatible in C.
     else ConvTy = Sema::CompatiblePointerDiscardsQualifiers;