First Commit

3rdparty/shaderc/glslc/test/option_fpreserve_bindings.py

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+# Copyright 2023 The Shaderc Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import expect
+from glslc_test_framework import inside_glslc_testsuite
+from placeholder import FileShader
+
+# A GLSL shader with unused bindings.
+GLSL_SHADER_WITH_UNUSED_BINDINGS = """#version 450
+  layout(binding=0) buffer InputA { vec4 x[]; } inputA;
+  layout(binding=1) buffer InputB { vec4 x[]; } inputB;
+  layout(binding=2) buffer Output { vec4 x[]; } outputO;
+
+  void main() {}
+  """
+
+
+@inside_glslc_testsuite('OptionFPreserveBindings')
+class TestFPreserveBindingsInputA(expect.ValidAssemblyFileWithSubstr):
+    """Tests that the compiler preserves bindings when optimizations are
+    enabled."""
+
+    shader = FileShader(GLSL_SHADER_WITH_UNUSED_BINDINGS, '.comp')
+    glslc_args = ['-S', '-O', shader, '-fpreserve-bindings']
+    # Check the first buffer.
+    expected_assembly_substr = "Binding 0"
+
+
+@inside_glslc_testsuite('OptionFPreserveBindings')
+class TestFPreserveBindingsInputB(expect.ValidAssemblyFileWithSubstr):
+    """Tests that the compiler preserves bindings when optimizations are
+    enabled."""
+
+    shader = FileShader(GLSL_SHADER_WITH_UNUSED_BINDINGS, '.comp')
+    glslc_args = ['-S', '-O', shader, '-fpreserve-bindings']
+    # Check the first buffer.
+    expected_assembly_substr = "Binding 1"
+
+
+@inside_glslc_testsuite('OptionFPreserveBindings')
+class TestFPreserveBindingsOutputO(expect.ValidAssemblyFileWithSubstr):
+    """Tests that the compiler preserves bindings when optimizations are
+    enabled."""
+
+    shader = FileShader(GLSL_SHADER_WITH_UNUSED_BINDINGS, '.comp')
+    glslc_args = ['-S', '-O', shader, '-fpreserve-bindings']
+    # Check the first buffer.
+    expected_assembly_substr = "Binding 2"
+
+
+@inside_glslc_testsuite('OptionFPreserveBindings')
+class TestFNoPreserveBindings(expect.ValidAssemblyFileWithoutSubstr):
+    """Tests that the compiler removes bindings when -fpreserve-bindings is not
+    set."""
+
+    shader = FileShader(GLSL_SHADER_WITH_UNUSED_BINDINGS, '.comp')
+    glslc_args = ['-S', '-O', shader]
+    # Check that all binding decorations are gone.
+    unexpected_assembly_substr = "OpDecorate"