- Have TryStaticImplicitCast set the cast kind to NoOp when binding a reference. CheckReferenceInit already inserts implicit casts to the necessary types. This fixes an assertion in CodeGen for some casts and brings a fix for PR5453 close, if I understand that bug correctly.

- Also, perform calculated implicit cast sequences if they're determined to work. This finally diagnoses static_cast to ambiguous or implicit bases and fixes two long-standing fixmes in the test case. For the C-style cast, this requires propagating the access check suppression pretty deep into other functions.
- Pass the expressions for TryStaticCast and TryStaticImplicitCast by reference. This should lead to a better AST being emitted for such casts, and also fixes a memory leak, because CheckReferenceInit and PerformImplicitConversion wrap the node passed to them. These wrappers were previously lost.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88809 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index 53e64dfc68..b324068ea8 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -1155,7 +1155,8 @@ bool Sema::isObjCPointerConversion(QualType FromType, QualType ToType,
 /// true. It returns true and produces a diagnostic if there was an
 /// error, or returns false otherwise.
 bool Sema::CheckPointerConversion(Expr *From, QualType ToType,
-                                  CastExpr::CastKind &Kind) {
+                                  CastExpr::CastKind &Kind,
+                                  bool IgnoreBaseAccess) {
   QualType FromType = From->getType();
 
   if (const PointerType *FromPtrType = FromType->getAs<PointerType>())
@@ -1169,7 +1170,8 @@ bool Sema::CheckPointerConversion(Expr *From, QualType ToType,
         // ambiguous or inaccessible conversion.
         if (CheckDerivedToBaseConversion(FromPointeeType, ToPointeeType,
                                          From->getExprLoc(),
-                                         From->getSourceRange()))
+                                         From->getSourceRange(),
+                                         IgnoreBaseAccess))
           return true;
         
         // The conversion was successful.
@@ -1238,7 +1240,9 @@ bool Sema::IsMemberPointerConversion(Expr *From, QualType FromType,
 /// true and produces a diagnostic if there was an error, or returns false
 /// otherwise.
 bool Sema::CheckMemberPointerConversion(Expr *From, QualType ToType,
-                                        CastExpr::CastKind &Kind) {
+                                        CastExpr::CastKind &Kind,
+                                        bool IgnoreBaseAccess) {
+  (void)IgnoreBaseAccess;
   QualType FromType = From->getType();
   const MemberPointerType *FromPtrType = FromType->getAs<MemberPointerType>();
   if (!FromPtrType) {