[Piglit] [PATCH] glsl-1.10: add some loop unrolling tests with breaks in else branch

[Timothy Arceri]

---
 ...loop-complex-unroll-with-else-break.shader_test | 71 ++++++++++++++++++++++
 ...l-else-break-unreachable-then-break.shader_test | 41 +++++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 tests/spec/glsl-1.10/execution/vs-loop-complex-unroll-with-else-break.shader_test
 create mode 100644 tests/spec/glsl-1.10/execution/vs-loop-unroll-else-break-unreachable-then-break.shader_test

diff --git a/tests/spec/glsl-1.10/execution/vs-loop-complex-unroll-with-else-break.shader_test b/tests/spec/glsl-1.10/execution/vs-loop-complex-unroll-with-else-break.shader_test
new file mode 100644
index 000000000..d543c3fc9
--- /dev/null
+++ b/tests/spec/glsl-1.10/execution/vs-loop-complex-unroll-with-else-break.shader_test
@@ -0,0 +1,71 @@
+# This tests unrolling of a loop with two exit point where the trip count
+# of one of the exits is known and the other unknown (loop_count uniform).
+#
+# Here we test all possible outcomes for the loop and also add some
+# unreachable code to make sure it is not accessible after unrolling.
+[require]
+GLSL >= 1.10
+
+[vertex shader]
+uniform int loop_count;
+
+void main()
+{
+  gl_Position = gl_Vertex;
+
+  vec4 colour = vec4(1.0, 1.0, 1.0, 1.0);
+  vec4 colour2 = vec4(0.0, 0.0, 0.0, 1.0);
+  for (int i = 0; i < loop_count; i++) {
+
+     if (i > 1) {
+        colour = vec4(1.0, 0.0, 0.0, 1.0);
+     }
+
+     if (i <= 1) {
+        colour = vec4(0.0, 1.0, 0.0, 1.0);
+     } else {
+        break;
+     }
+
+     /* Unreachable break */
+     if (i > 2) {
+        break;
+     }
+
+     /* This should be unreachable */
+     if (i >= 2) {
+        colour2 = vec4(0.0, 1.0, 0.0, 1.0);
+     }
+  }
+
+  gl_FrontColor = colour + colour2;
+}
+
+[fragment shader]
+void main()
+{
+  gl_FragColor = gl_Color;
+}
+
+[test]
+clear color 0.5 0.5 0.5 0.5
+
+uniform int loop_count 4
+draw rect -1 -1 2 2
+probe all rgba 1.0 0.0 0.0 1.0
+
+uniform int loop_count 3
+draw rect -1 -1 2 2
+probe all rgba 1.0 0.0 0.0 1.0
+
+uniform int loop_count 2
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
+
+uniform int loop_count 1
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
+
+uniform int loop_count 0
+draw rect -1 -1 2 2
+probe all rgba 1.0 1.0 1.0 1.0
diff --git a/tests/spec/glsl-1.10/execution/vs-loop-unroll-else-break-unreachable-then-break.shader_test b/tests/spec/glsl-1.10/execution/vs-loop-unroll-else-break-unreachable-then-break.shader_test
new file mode 100644
index 000000000..1e83a6f41
--- /dev/null
+++ b/tests/spec/glsl-1.10/execution/vs-loop-unroll-else-break-unreachable-then-break.shader_test
@@ -0,0 +1,41 @@
+# This tests unrolling of a loop with two exit point where the limiting
+# terminator has its break in the else branch.
+[require]
+GLSL >= 1.10
+
+[vertex shader]
+uniform int loop_count;
+
+void main()
+{
+  gl_Position = gl_Vertex;
+
+  vec4 colour = vec4(1.0, 1.0, 1.0, 1.0);
+  vec4 colour2 = vec4(0.0, 0.0, 0.0, 0.0);
+  for (int i = 0; i < 3; i++) {
+     if (i <= 1) {
+        colour = vec4(0.0, 1.0, 0.0, 1.0);
+     } else {
+        break;
+     }
+
+     /* This should be unreachable */
+     if (i >= 2) {
+        colour2 = vec4(1.0, 0.0, 0.0, 1.0);
+     }
+  }
+
+  gl_FrontColor = colour + colour2;
+}
+
+[fragment shader]
+void main()
+{
+  gl_FragColor = gl_Color;
+}
+
+[test]
+clear color 0.5 0.5 0.5 0.5
+
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
-- 
2.13.5