diff options
| -rw-r--r-- | src/glsl/nir/nir_from_ssa.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/glsl/nir/nir_from_ssa.c b/src/glsl/nir/nir_from_ssa.c index c3090fb06f4..184698abd5c 100644 --- a/src/glsl/nir/nir_from_ssa.c +++ b/src/glsl/nir/nir_from_ssa.c @@ -509,12 +509,13 @@ get_register_for_ssa_def(nir_ssa_def *def, struct from_ssa_state *state) reg->num_components = def->num_components; reg->num_array_elems = 0; - /* This register comes from an SSA definition that was not part of a - * phi-web. Therefore, we know it has a single unique definition - * that dominates all of its uses. Therefore, we can copy the + /* This register comes from an SSA definition that is defined and not + * part of a phi-web. Therefore, we know it has a single unique + * definition that dominates all of its uses; we can copy the * parent_instr from the SSA def safely. */ - reg->parent_instr = def->parent_instr; + if (def->parent_instr->type != nir_instr_type_ssa_undef) + reg->parent_instr = def->parent_instr; _mesa_hash_table_insert(state->ssa_table, def, reg); return reg; |