Disable the initialization of shared memory

src/compiler/translator/OutputHLSL.cpp

@@ -2113,8 +2113,11 @@ bool OutputHLSL::visitDeclaration(Visit visit, TIntermDeclaration *node)
                 {
                     symbol->traverse(this);
                     out << ArrayString(symbol->getType());
-                    if (declarator->getQualifier() != EvqShared ||
-                        mCompileOptions & SH_INIT_SHARED_VARIABLES)
+                    // Temporarily disable shadred memory initialization. It is very slow for D3D11
+                    // drivers to compile a compute shader if we add code to initialize a
+                    // groupshared array variable with a large array size. And maybe produce
+                    // incorrect result. See http://anglebug.com/3226.
+                    if (declarator->getQualifier() != EvqShared)
                     {
                         out << " = " + zeroInitializer(symbol->getType());
                     }

src/tests/gl_tests/ComputeShaderTest.cpp

@@ -2378,6 +2378,8 @@ TEST_P(ComputeShaderTestES3, NotSupported)
 // The contents of shared variables should be cleared to zero at the beginning of shader execution.
 TEST_P(WebGL2ComputeTest, sharedVariablesShouldBeZero)
 {
+    // http://anglebug.com/3226
+    ANGLE_SKIP_TEST_IF(IsD3D11());
     const char kCSShader[] = R"(#version 310 es
 layout (local_size_x = 4, local_size_y = 4, local_size_z = 1) in;
 layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;