[Piglit] [PATCH] shaders: Reproduce a bug in the i965/anv backend compiler

[Lionel Landwerlin]

We were dropping negations/abs while trying to optimize.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109601
---
 tests/shaders/glsl-bug-109601.shader_test | 28 +++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 tests/shaders/glsl-bug-109601.shader_test

diff --git a/tests/shaders/glsl-bug-109601.shader_test b/tests/shaders/glsl-bug-109601.shader_test
new file mode 100644
index 000000000..c060233e9
--- /dev/null
+++ b/tests/shaders/glsl-bug-109601.shader_test
@@ -0,0 +1,28 @@
+[require]
+GL >= 3.0
+GLSL >= 3.30
+
+[vertex shader passthrough]
+
+[fragment shader]
+#version 330
+#extension GL_ARB_shader_storage_buffer_object: require
+
+uniform int v1;
+uniform float v2;
+
+void main()
+{
+	float a = -(v1 >> 16);
+	gl_FragColor = vec4(a * v2,0.0f,0.0f,1.0f);
+}
+
+[test]
+clear color 0.0 0.0 0.0 0.0
+clear
+
+uniform int v1 0x10000
+uniform float v2 -1
+
+draw rect -1 -1 2 2
+probe all rgba 1.0 0.0 0.0 1.0
-- 
2.20.1