[PATCH] D25106: Packed member warning: Use the typedef name for anonymous structures when it is available

[Alex Lorenz via cfe-commits]

arphaman set the repository for this revision to rL LLVM.
arphaman updated this revision to Diff 73338.
arphaman marked 2 inline comments as done.
arphaman added a comment.

Update to the patch that follows Aaron's comments:

- Uses the explicit type name instead of auto.
- Expands the test by adding a scenario where an inner anonymous union is contained in a structure.


Repository:
  rL LLVM

https://reviews.llvm.org/D25106

Files:
  lib/Sema/SemaChecking.cpp
  test/Sema/address-packed.c


Index: test/Sema/address-packed.c
===================================================================
--- test/Sema/address-packed.c
+++ test/Sema/address-packed.c
@@ -161,3 +161,38 @@
 {
     return (struct AlignedTo2Bis*)&s->x; // no-warning
 }
+
+typedef struct {
+  char c;
+  int x;
+} __attribute__((packed)) TypedefStructArguable;
+
+typedef union {
+  char c;
+  int x;
+} __attribute((packed)) TypedefUnionArguable;
+
+typedef TypedefStructArguable TypedefStructArguableTheSecond;
+
+int *typedef1(TypedefStructArguable *s) {
+    return &s->x; // expected-warning {{packed member 'x' of class or structure 'TypedefStructArguable'}}
+}
+
+int *typedef2(TypedefStructArguableTheSecond *s) {
+    return &s->x; // expected-warning {{packed member 'x' of class or structure 'TypedefStructArguable'}}
+}
+
+int *typedef3(TypedefUnionArguable *s) {
+    return &s->x; // expected-warning {{packed member 'x' of class or structure 'TypedefUnionArguable'}}
+}
+
+struct S6 {
+  union {
+    char c;
+    int x;
+  } __attribute__((packed));
+};
+
+int *anonymousInnerUnion(struct S6 *s) {
+  return &s->x; // expected-warning {{packed member 'x' of class or structure 'S6::(anonymous)'}}
+}
Index: lib/Sema/SemaChecking.cpp
===================================================================
--- lib/Sema/SemaChecking.cpp
+++ lib/Sema/SemaChecking.cpp
@@ -11372,8 +11372,13 @@
 
 void Sema::DiagnoseMisalignedMembers() {
   for (MisalignedMember &m : MisalignedMembers) {
+    const NamedDecl *ND = m.RD;
+    if (ND->getName().empty()) {
+      if (const TypedefNameDecl *TD = m.RD->getTypedefNameForAnonDecl())
+        ND = TD;
+    }
     Diag(m.E->getLocStart(), diag::warn_taking_address_of_packed_member)
-        << m.MD << m.RD << m.E->getSourceRange();
+        << m.MD << ND << m.E->getSourceRange();
   }
   MisalignedMembers.clear();
 }


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D25106.73338.patch
Type: text/x-patch
Size: 1852 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20161003/d829311e/attachment.bin>