[Bug 109265] [regression, bisected] arb_texture_multisample texelfetch piglit test failing on NIR backend

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=109265

--- Comment #4 from Timothy Arceri <t_arceri@yahoo.com.au> ---
This is odd. As far as I can tell the shader variant produced after loading
from the case is the same as the one produced when the cache is disabled.

Its also a fairly simple program. From tests/texturing/shaders/texelFetch.c the
offending program is:

    int vs = piglit_compile_shader_text(GL_VERTEX_SHADER,
            "#version 130\n"
            "#extension GL_ARB_explicit_attrib_location: require\n"
            "layout(location=0) in vec4 pos;\n"
            "void main() {\n"
            "   gl_Position = pos;\n"
            "}\n");
    (void)!asprintf(&fs_code,
            "#version 130\n"
            "#extension GL_ARB_explicit_attrib_location: require\n"
            "#extension GL_ARB_fragment_coord_conventions: require\n"
            "uniform int layer;\n"
            "uniform int si;\n"
            "layout(pixel_center_integer) in vec4 gl_FragCoord;\n"
            "layout(location=0) out %s o;\n"
            "void main() {\n"
            "  o = %s(%sgl_FragCoord.x, gl_FragCoord.y, layer, si);\n"
            "}\n",
            sampler.return_type,
            sampler.return_type,
            sampler.data_type == GL_UNSIGNED_INT ? "" : "-");

We must not be setting a flag somewhere, but I've looked over the code that
handles the cache multiple  time now and can't spot any real difference between
tgsi and nir.

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