Fix #14257 FP autoVariables, local struct with pointer that points at global data (#7954)

Author: chrchr-github

lib/checkautovariables.cpp

@@ -99,6 +99,8 @@ static bool isAutoVar(const Token *tok)
         } while (Token::Match(tok, "%name% .|::"));
         if (Token::Match(tok, "%name% ("))
             return false;
+        if (tok->variable() && tok->variable()->isPointer())
+            return false;
     }
     return true;
 }

test/testautovariables.cpp

@@ -68,6 +68,7 @@ class TestAutoVariables : public TestFixture {
         TEST_CASE(testautovar14); // ticket #4776 - assignment of function parameter, goto
         TEST_CASE(testautovar15); // ticket #6538
         TEST_CASE(testautovar16); // ticket #8114
+        TEST_CASE(testautovar17);
         TEST_CASE(testautovar_array1);
         TEST_CASE(testautovar_array2);
         TEST_CASE(testautovar_array3);
@@ -504,6 +505,17 @@ class TestAutoVariables : public TestFixture {
         ASSERT_EQUALS("", errout_str());
     }
 
+    void testautovar17() {
+        check("struct S { int* p; };\n" // #14257
+              "int a[10];\n"
+              "void f(int** q) {\n"
+              "    S s;\n"
+              "    s.p = a;\n"
+              "    *q = &s.p[0];\n"
+              "}\n");
+        ASSERT_EQUALS("", errout_str());
+    }
+
     void testautovar_array1() {
         check("void func1(int* arr[2])\n"
               "{\n"