diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/compiler/spirv/spirv_to_nir.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/src/compiler/spirv/spirv_to_nir.c b/src/compiler/spirv/spirv_to_nir.c index 670bd1bcb89..42731f7eb62 100644 --- a/src/compiler/spirv/spirv_to_nir.c +++ b/src/compiler/spirv/spirv_to_nir.c @@ -4481,20 +4481,35 @@ spirv_to_nir(const uint32_t *words, size_t word_count, } } while (progress); + vtn_assert(b->entry_point->value_type == vtn_value_type_function); + nir_function *entry_point = b->entry_point->func->impl->function; + vtn_assert(entry_point); + + entry_point->is_entrypoint = true; + + /* When multiple shader stages exist in the same SPIR-V module, we + * generate input and output variables for every stage, in the same + * NIR program. These dead variables can be invalid NIR. For example, + * TCS outputs must be per-vertex arrays (or decorated 'patch'), while + * VS output variables wouldn't be. + * + * To ensure we have valid NIR, we eliminate any dead inputs and outputs + * right away. In order to do so, we must lower any constant initializers + * on outputs so nir_remove_dead_variables sees that they're written to. + */ + nir_lower_constant_initializers(b->shader, nir_var_shader_out); + nir_remove_dead_variables(b->shader, + nir_var_shader_in | nir_var_shader_out); + /* We sometimes generate bogus derefs that, while never used, give the * validator a bit of heartburn. Run dead code to get rid of them. */ nir_opt_dce(b->shader); - vtn_assert(b->entry_point->value_type == vtn_value_type_function); - nir_function *entry_point = b->entry_point->func->impl->function; - vtn_assert(entry_point); - /* Unparent the shader from the vtn_builder before we delete the builder */ ralloc_steal(NULL, b->shader); ralloc_free(b); - entry_point->is_entrypoint = true; return entry_point; } |