Disallow local function prototypes

src/compiler/translator/ParseContext.cpp

@@ -1968,6 +1968,14 @@ TIntermAggregate *TParseContext::addFunctionPrototypeDeclaration(const TFunction
     prototype->setOp(EOpPrototype);
 
     symbolTable.pop();
+
+    if (!symbolTable.atGlobalLevel())
+    {
+        // ESSL 3.00.4 section 4.2.4.
+        error(location, "local function prototype declarations are not allowed", "function");
+        recover();
+    }
+
     return prototype;
 }
 

src/tests/compiler_tests/MalformedShader_test.cpp

@@ -1494,3 +1494,22 @@ TEST_F(MalformedShaderTest, DuplicatePrototypeESSL3)
         FAIL() << "Shader compilation failed, expecting success " << mInfoLog;
     }
 }
+
+// Shaders with a local function prototype should be rejected.
+// ESSL 3.00.4 section 4.2.4.
+TEST_F(MalformedShaderTest, LocalFunctionPrototype)
+{
+    const std::string &shaderString =
+        "#version 300 es\n"
+        "precision mediump float;\n"
+        "out vec4 my_FragColor;\n"
+        "void main()\n"
+        "{\n"
+        "    void foo();\n"
+        "    my_FragColor = vec4(0.0);\n"
+        "}\n";
+    if (compile(shaderString))
+    {
+        FAIL() << "Shader compilation succeeded, expecting failure " << mInfoLog;
+    }
+}

src/tests/deqp_support/deqp_gles2_test_expectations.txt

@@ -246,8 +246,6 @@
 1143 MAC : dEQP-GLES2.functional.texture.specification.basic_copyteximage2d.cube_* = FAIL
 
 // Windows and Linux failures
-1015 WIN LINUX : dEQP-GLES2.functional.shaders.functions.invalid.local_function_prototype_vertex = FAIL
-1015 WIN LINUX : dEQP-GLES2.functional.shaders.functions.invalid.local_function_prototype_fragment = FAIL
 1020 WIN LINUX : dEQP-GLES2.functional.texture.mipmap.cube.projected.linear_linear = FAIL
 504 WIN LINUX : dEQP-GLES2.functional.uniform_api.value.assigned.by_value.render.nested_structs_arrays.sampler2D_samplerCube_* = FAIL
 

src/tests/deqp_support/deqp_gles3_test_expectations.txt

@@ -47,8 +47,6 @@
 
 // TODO(jmadill): triage these into permanent and temporary failures
 
-1089 WIN : dEQP-GLES3.functional.shaders.functions.invalid.local_function_prototype_vertex = FAIL
-1089 WIN : dEQP-GLES3.functional.shaders.functions.invalid.local_function_prototype_fragment = FAIL
 1091 WIN : dEQP-GLES3.functional.shaders.loops.for_constant_iterations.nested_sequence_vertex = FAIL
 1091 WIN : dEQP-GLES3.functional.shaders.loops.for_constant_iterations.nested_sequence_fragment = FAIL
 1091 WIN : dEQP-GLES3.functional.shaders.loops.for_constant_iterations.nested_tricky_dataflow_1_vertex = FAIL