c language: diagnose use of "[*]" on any array dimension

in the parameter of a function definition. Currently,
it crashes in irgen if it is on other than the 1st dimension.
// rdar://13705391


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180732 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 1 deletions

diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 8adfbd598f..c19fe27c7f 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -5703,12 +5703,14 @@ bool Sema::CheckParmsForFunctionDef(ParmVarDecl **P, ParmVarDecl **PEnd,
     //   notation in their sequences of declarator specifiers to specify
     //   variable length array types.
     QualType PType = Param->getOriginalType();
-    if (const ArrayType *AT = Context.getAsArrayType(PType)) {
+    while (const ArrayType *AT = Context.getAsArrayType(PType)) {
       if (AT->getSizeModifier() == ArrayType::Star) {
         // FIXME: This diagnostic should point the '[*]' if source-location
         // information is added for it.
         Diag(Param->getLocation(), diag::err_array_star_in_function_definition);
+        break;
       }
+      PType= AT->getElementType();
     }
   }
 
diff --git a/test/Sema/crash-invalid-array.c b/test/Sema/crash-invalid-array.c
index a3bc03b70b..eeac39148c 100644
--- a/test/Sema/crash-invalid-array.c
+++ b/test/Sema/crash-invalid-array.c
@@ -15,3 +15,10 @@ int main()
        p[i][i] = i;
    }
 }
+
+// rdar://13705391
+void foo(int a[*][2]) {(void)a[0][1]; } // expected-error {{variable length array must be bound in function definition}}
+void foo1(int a[2][*]) {(void)a[0][1]; } // expected-error {{variable length array must be bound in function definition}}
+void foo2(int a[*][*]) {(void)a[0][1]; } // expected-error {{variable length array must be bound in function definition}}
+void foo3(int a[2][*][2]) {(void)a[0][1][1]; } // expected-error {{variable length array must be bound in function definition}}
+void foo4(int a[2][*][*]) {(void)a[0][1][1]; } // expected-error {{variable length array must be bound in function definition}}