[Piglit] [PATCH 06/12] Test ARB_compute_shader built-in constant gl_WorkGroupSize.

[Paul Berry]

---
 .../compiler/gl_WorkGroupSize_before_layout.comp   | 22 ++++++++++++++++
 .../compiler/gl_WorkGroupSize_matches_layout.comp  | 29 ++++++++++++++++++++++
 .../compiler/gl_WorkGroupSize_without_layout.comp  | 18 ++++++++++++++
 3 files changed, 69 insertions(+)
 create mode 100644 tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_before_layout.comp
 create mode 100644 tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_matches_layout.comp
 create mode 100644 tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_without_layout.comp

diff --git a/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_before_layout.comp b/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_before_layout.comp
new file mode 100644
index 0000000..23324e3
--- /dev/null
+++ b/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_before_layout.comp
@@ -0,0 +1,22 @@
+// [config]
+// expect_result: fail
+// glsl_version: 3.30
+// require_extensions: GL_ARB_compute_shader
+// [end config]
+//
+// From the GLSL 4.4 spec, section 7.1 (Built-in Language Variables):
+//
+//     It is a compile-time error to use gl_WorkGroupSize in a shader
+//     that does not declare a fixed local group size, or before that
+//     shader has declared a fixed local group size, using
+//     local_size_x, local_size_y, and local_size_z.
+
+#version 330
+#extension GL_ARB_compute_shader: enable
+
+void main()
+{
+  ivec3 size = gl_WorkGroupSize;
+}
+
+layout(local_size_x = 3, local_size_y = 5, local_size_z = 7) in;
diff --git a/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_matches_layout.comp b/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_matches_layout.comp
new file mode 100644
index 0000000..094bcd9
--- /dev/null
+++ b/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_matches_layout.comp
@@ -0,0 +1,29 @@
+// [config]
+// expect_result: pass
+// glsl_version: 3.30
+// require_extensions: GL_ARB_compute_shader
+// [end config]
+//
+// From the GLSL 4.4 spec, section 7.1 (Built-in Language Variables):
+//
+//     The built-in constant gl_WorkGroupSize is a compute-shader
+//     constant containing the local work-group size of the
+//     shader. The size of the work group in the X, Y, and Z
+//     dimensions is stored in the x, y, and z components. The
+//     constants values in gl_WorkGroupSize will match those specified
+//     in the required local_size_x, local_size_y, and local_size_z
+//     layout qualifiers for the current shader. This is a constant so
+//     that it can be used to size arrays of memory that can be shared
+//     within the local work group.
+
+#version 330
+#extension GL_ARB_compute_shader: enable
+
+layout(local_size_x = 3, local_size_y = 5, local_size_z = 7) in;
+
+void main()
+{
+  int x[gl_WorkGroupSize.x == 3 ? 1 : -1];
+  int y[gl_WorkGroupSize.y == 5 ? 1 : -1];
+  int z[gl_WorkGroupSize.z == 7 ? 1 : -1];
+}
diff --git a/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_without_layout.comp b/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_without_layout.comp
new file mode 100644
index 0000000..cec8c45
--- /dev/null
+++ b/tests/spec/arb_compute_shader/compiler/gl_WorkGroupSize_without_layout.comp
@@ -0,0 +1,18 @@
+// [config]
+// expect_result: fail
+// glsl_version: 3.30
+// require_extensions: GL_ARB_compute_shader
+// [end config]
+//
+// From the GLSL 4.4 spec, section 7.1 (Built-in Language Variables):
+//
+//     It is a compile-time error to use gl_WorkGroupSize in a shader
+//     that does not declare a fixed local group size ...
+
+#version 330
+#extension GL_ARB_compute_shader: enable
+
+void main()
+{
+  ivec3 size = gl_WorkGroupSize;
+}
-- 
1.8.5.2