[clang][RecoveryExpr] Don't perform alignment check if parameter type is dependent

This patch fixes a crash which appears because of getTypeAlignInChars() call with depentent type.

Reviewed By: hokein

Differential Revision: https://reviews.llvm.org/D133886

Author: ArcsinX

clang/lib/Sema/SemaChecking.cpp

@@ -5690,9 +5690,9 @@ void Sema::CheckArgAlignment(SourceLocation Loc, NamedDecl *FDecl,
 
   // Find expected alignment, and the actual alignment of the passed object.
   // getTypeAlignInChars requires complete types
-  if (ArgTy.isNull() || ParamTy->isIncompleteType() ||
-      ArgTy->isIncompleteType() || ParamTy->isUndeducedType() ||
-      ArgTy->isUndeducedType())
+  if (ArgTy.isNull() || ParamTy->isDependentType() ||
+      ParamTy->isIncompleteType() || ArgTy->isIncompleteType() ||
+      ParamTy->isUndeducedType() || ArgTy->isUndeducedType())
     return;
 
   CharUnits ParamAlign = Context.getTypeAlignInChars(ParamTy);

clang/test/SemaCXX/recovery-expr-type.cpp

@@ -162,3 +162,12 @@ extern "C" void *memset(void *, int b, unsigned long) {
   b = __builtin_object_size(c, 0); // crash2
 }
 }
+
+namespace test15 {
+void f() {
+  struct {
+    void m(int (&)[undefined()]) {} // expected-error {{undeclared identifier}}
+  } S;
+  S.m(1); // no crash
+}
+}