[PATCH] D36670: misc-misplaced-widening-cast: fix assertion

[Anders Rönnholm via Phabricator via cfe-commits]

AndersRonnholm created this revision.
AndersRonnholm added a project: clang-tools-extra.

Fixes assert reported in https://bugs.llvm.org/show_bug.cgi?id=33660


Repository:
  rL LLVM

https://reviews.llvm.org/D36670

Files:
  clang-tidy/misc/MisplacedWideningCastCheck.cpp
  test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp


Index: test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp
===================================================================
--- test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp
+++ test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp
@@ -56,3 +56,9 @@
     return (long)a * 1000;
   }
 }
+
+// Shall not generate an assert. https://bugs.llvm.org/show_bug.cgi?id=33660
+template <class> class A {
+  enum Type {};
+  static char *m_fn1() { char p = (Type)(&p - m_fn1()); }
+};
Index: clang-tidy/misc/MisplacedWideningCastCheck.cpp
===================================================================
--- clang-tidy/misc/MisplacedWideningCastCheck.cpp
+++ clang-tidy/misc/MisplacedWideningCastCheck.cpp
@@ -192,6 +192,10 @@
   if (Calc->getLocStart().isMacroID())
     return;
 
+  if (Cast->isTypeDependent() || Cast->isValueDependent() ||
+      Calc->isTypeDependent() || Calc->isValueDependent())
+    return;
+
   ASTContext &Context = *Result.Context;
 
   QualType CastType = Cast->getType();



Index: test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp
===================================================================
--- test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp
+++ test/clang-tidy/misc-misplaced-widening-cast-explicit-only.cpp
@@ -56,3 +56,9 @@
     return (long)a * 1000;
   }
 }
+
+// Shall not generate an assert. https://bugs.llvm.org/show_bug.cgi?id=33660
+template <class> class A {
+  enum Type {};
+  static char *m_fn1() { char p = (Type)(&p - m_fn1()); }
+};
Index: clang-tidy/misc/MisplacedWideningCastCheck.cpp
===================================================================
--- clang-tidy/misc/MisplacedWideningCastCheck.cpp
+++ clang-tidy/misc/MisplacedWideningCastCheck.cpp
@@ -192,6 +192,10 @@
   if (Calc->getLocStart().isMacroID())
     return;
 
+  if (Cast->isTypeDependent() || Cast->isValueDependent() ||
+      Calc->isTypeDependent() || Calc->isValueDependent())
+    return;
+
   ASTContext &Context = *Result.Context;
 
   QualType CastType = Cast->getType();

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