glsl-1.50: Add compiler tests to verify gl_FragCoord layout qualifiers

Both tests in this patch pass with proprietary linux drivers of:
NVIDIA (version 331.38) and AMD (version 9.012).

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

3 files changed, 111 insertions, 0 deletions

diff --git a/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-conflicting-case-1.frag b/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-conflicting-case-1.frag
new file mode 100644
index 000000000..558800e7e
--- /dev/null
+++ b/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-conflicting-case-1.frag
@@ -0,0 +1,37 @@
+/* [config]
+ * expect_result: fail
+ * glsl_version: 1.50
+ * check_link: false
+ * [end config]
+ */
+
+/* Section 4.3.8.1 (Input Layout Qualifiers) of the GLSL 1.50 spec says:
+ *
+ *     "Fragment shaders can have an input layout only for redeclaring the
+ *     built-in variable gl_FragCoord (see section 7.2 Fragment Shader
+ *     Special Variables). The layout qualifier identifiers for
+ *     gl_FragCoord are
+ *
+ *     layout-qualifier-id:
+ *         origin_upper_left
+ *         pixel_center_integer"
+ *
+ *     "If gl_FragCoord is redeclared in any fragment shader in a program,
+ *      it must be redeclared in all the fragment shaders in that program
+ *      that have a static use gl_FragCoord. All redeclarations of
+ *      gl_FragCoord in all fragment shaders in a single program must have
+ *      the same set of qualifiers."
+ *
+ * Tests the conflicting redeclarations of gl_FragCoord within same fragment
+ * shader.
+ */
+
+#version 150
+
+layout(origin_upper_left, pixel_center_integer) in vec4 gl_FragCoord;
+layout(origin_upper_left) in vec4 gl_FragCoord;
+out vec4 fragcolor;
+void main()
+{
+     fragcolor = gl_FragCoord.xyzz;
+}
diff --git a/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-conflicting-case-2.frag b/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-conflicting-case-2.frag
new file mode 100644
index 000000000..9a3e9f5ac
--- /dev/null
+++ b/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-conflicting-case-2.frag
@@ -0,0 +1,37 @@
+/* [config]
+ * expect_result: fail
+ * glsl_version: 1.50
+ * check_link: false
+ * [end config]
+ */
+
+/* Section 4.3.8.1 (Input Layout Qualifiers) of the GLSL 1.50 spec says:
+ *
+ *     "Fragment shaders can have an input layout only for redeclaring the
+ *     built-in variable gl_FragCoord (see section 7.2 Fragment Shader
+ *     Special Variables). The layout qualifier identifiers for
+ *     gl_FragCoord are
+ *
+ *     layout-qualifier-id:
+ *         origin_upper_left
+ *         pixel_center_integer"
+ *
+ *     "If gl_FragCoord is redeclared in any fragment shader in a program,
+ *      it must be redeclared in all the fragment shaders in that program
+ *      that have a static use gl_FragCoord. All redeclarations of
+ *      gl_FragCoord in all fragment shaders in a single program must have
+ *      the same set of qualifiers."
+ *
+ * Tests the conflicting redeclarations in a fragment shader cause the compile
+ * failure even if gl_FragCoord is not used.
+ */
+
+#version 150
+
+layout(origin_upper_left, pixel_center_integer) in vec4 gl_FragCoord;
+layout(origin_upper_left) in vec4 gl_FragCoord;
+out vec4 fragcolor;
+void main()
+{
+     fragcolor = vec4(1.0);
+}
diff --git a/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-matching.frag b/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-matching.frag
new file mode 100644
index 000000000..63942cc58
--- /dev/null
+++ b/tests/spec/glsl-1.50/compiler/fragment_coord_conventions/layout-qualifiers-matching.frag
@@ -0,0 +1,37 @@
+/* [config]
+ * expect_result: pass
+ * glsl_version: 1.50
+ * check_link: false
+ * [end config]
+ */
+
+/* Section 4.3.8.1 (Input Layout Qualifiers) of the GLSL 1.50 spec says:
+ *
+ *     "Fragment shaders can have an input layout only for redeclaring the
+ *     built-in variable gl_FragCoord (see section 7.2 Fragment Shader
+ *     Special Variables). The layout qualifier identifiers for
+ *     gl_FragCoord are
+ *
+ *     layout-qualifier-id:
+ *         origin_upper_left
+ *         pixel_center_integer"
+ *
+ *     "If gl_FragCoord is redeclared in any fragment shader in a program,
+ *      it must be redeclared in all the fragment shaders in that program
+ *      that have a static use gl_FragCoord. All redeclarations of
+ *      gl_FragCoord in all fragment shaders in a single program must have
+ *      the same set of qualifiers."
+ *
+ * Tests the matching redeclarations of gl_FragCoord within same fragment
+ * shader.
+ */
+
+#version 150
+
+layout(origin_upper_left, pixel_center_integer) in vec4 gl_FragCoord;
+layout(origin_upper_left, pixel_center_integer) in vec4 gl_FragCoord;
+
+void main()
+{
+     gl_FragColor = gl_FragCoord.xyzz;
+}