i965/fs: Fix the inline nir_op_pack_double optimization

We can only do the optimization if the source *is* SSA.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: "13.0 17.0" <mesa-stable@lists.freedesktop.org>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index 991c20f..94f2751 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -1219,7 +1219,7 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
        * the unpack operation.
        */
       for (int i = 0; i < 2; i++) {
-         if (instr->src[i].src.is_ssa)
+         if (!instr->src[i].src.is_ssa)
             continue;
 
          const nir_instr *parent_instr = instr->src[i].src.ssa->parent_instr;