Fix early fragment tests optimization condition.

src/libANGLE/Shader.h

@@ -85,8 +85,6 @@ class ShaderState final : angle::NonCopyable
         return mActiveOutputVariables;
     }
 
-    bool isEarlyFragmentTeststOptimization() const { return mEarlyFragmentTestsOptimization; }
-
     bool compilePending() const { return mCompileStatus == CompileStatus::COMPILE_REQUESTED; }
 
     const sh::WorkGroupSize &getLocalSize() const { return mLocalSize; }

src/libANGLE/State.h

@@ -820,7 +820,10 @@ class State : angle::NonCopyable
         return mNoSimultaneousConstantColorAndAlphaBlendFunc;
     }
 
-    bool isEarlyFragmentTestsOptimizationAllowed() const { return isSampleCoverageEnabled(); }
+    bool canEnableEarlyFragmentTestsOptimization() const
+    {
+        return !isSampleAlphaToCoverageEnabled();
+    }
 
     const BufferVector &getOffsetBindingPointerUniformBuffers() const { return mUniformBuffers; }
 

src/libANGLE/renderer/vulkan/ProgramExecutableVk.cpp

@@ -618,7 +618,7 @@ void ProgramExecutableVk::updateEarlyFragmentTestsOptimization(ContextVk *contex
     const gl::State &glState = contextVk->getState();
 
     mTransformOptionBits[ProgramTransformOption::RemoveEarlyFragmentTestsOptimization] = false;
-    if (!glState.isEarlyFragmentTestsOptimizationAllowed())
+    if (!glState.canEnableEarlyFragmentTestsOptimization())
     {
         ProgramVk *programVk = getShaderProgram(glState, gl::ShaderType::Fragment);
         if (programVk->getState().hasEarlyFragmentTestsOptimization())