Mesa (main): r600/sfn: Lower FS pos input w-transform in NIR

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Module: Mesa
Branch: main
Commit: 3b4b962c1524075d0578f3fbac8a9b7a13f36036
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3b4b962c1524075d0578f3fbac8a9b7a13f36036

Author: Gert Wollny <gert.wollny at collabora.com>
Date:   Fri Apr 30 20:12:19 2021 +0200

r600/sfn: Lower FS pos input w-transform in NIR

Signed-off-by: Gert Wollny <gert.wollny at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10608>

---

 src/gallium/drivers/r600/sfn/sfn_nir.cpp             | 1 +
 src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp | 2 --
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/gallium/drivers/r600/sfn/sfn_nir.cpp b/src/gallium/drivers/r600/sfn/sfn_nir.cpp
index f1c663819c9..76310f9f596 100644
--- a/src/gallium/drivers/r600/sfn/sfn_nir.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_nir.cpp
@@ -892,6 +892,7 @@ int r600_shader_from_nir(struct r600_context *rctx,
       NIR_PASS_V(sel->nir, r600_vectorize_vs_inputs);
 
    if (sel->nir->info.stage == MESA_SHADER_FRAGMENT) {
+      NIR_PASS_V(sel->nir, nir_lower_fragcoord_wtrans);
       NIR_PASS_V(sel->nir, r600_lower_fs_out_to_vector);
    }
 
diff --git a/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp b/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp
index b13cb8a8a1d..9cb15d93829 100644
--- a/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp
@@ -400,8 +400,6 @@ void FragmentShaderFromNir::emit_shader_start()
          auto v = new GPRValue(m_frag_pos_index, i);
          v->set_as_input();
          auto reg = PValue(v);
-         if (i == 3)
-            emit_instruction(new AluInstruction(op1_recip_ieee, reg, reg, {alu_write, alu_last_instr}));
          m_frag_pos[i] = reg;
       }
    }