Fixed #9314 (false positive: (error) Uninitialized variable: ret)

lib/checkuninitvar.cpp

@@ -244,6 +244,14 @@ static void conditionAlwaysTrueOrFalse(const Token *tok, const std::map<int, Var
     if (!tok)
         return;
 
+    if (tok->hasKnownIntValue()) {
+        if (tok->getKnownIntValue() == 0)
+            *alwaysFalse = true;
+        else
+            *alwaysTrue = true;
+        return;
+    }
+
     if (tok->isName() || tok->str() == ".") {
         while (tok && tok->str() == ".")
             tok = tok->astOperand2();

test/testuninitvar.cpp

@@ -790,6 +790,14 @@ private:
                        "}");
         ASSERT_EQUALS("[test.cpp:6]: (error) Uninitialized variable: a\n", errout.str());
 
+        checkUninitVar("int foo() {\n"
+                       "    int i;\n"
+                       "    if (1)\n"
+                       "        i = 11;\n"
+                       "    return i;\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
         checkUninitVar("int foo()\n"
                        "{\n"
                        "    int i;\n"