nir/lower_doubles: Inline functions directly in lower_doubles

Instead of trusting the caller to already have created a softfp64
function shader and added all its functions to our shader, we simply
take the softfp64 shader as an argument and do the function inlining
ouselves.  This means that there's no more nasty functions lying around
that the caller needs to worry about cleaning up.

Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 4 insertions, 18 deletions

diff --git a/src/intel/compiler/brw_nir.c b/src/intel/compiler/brw_nir.c
index 58b89a1bd3c..34aaa29a5cb 100644
--- a/src/intel/compiler/brw_nir.c
+++ b/src/intel/compiler/brw_nir.c
@@ -653,7 +653,8 @@ lower_bit_size_callback(const nir_alu_instr *alu, UNUSED void *data)
  * is_scalar = true to scalarize everything prior to code gen.
  */
 nir_shader *
-brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir)
+brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir,
+                   const nir_shader *softfp64)
 {
    const struct gen_device_info *devinfo = compiler->devinfo;
    UNUSED bool progress; /* Written by OPT */
@@ -677,7 +678,7 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir)
       progress = false;
 
       OPT(nir_lower_int64, nir->options->lower_int64_options);
-      OPT(nir_lower_doubles, nir->options->lower_doubles_options);
+      OPT(nir_lower_doubles, softfp64, nir->options->lower_doubles_options);
 
       /* Necessary to lower add -> sub and div -> mul/rcp */
       OPT(nir_opt_algebraic);
@@ -685,21 +686,6 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir)
       lowered_64bit_ops |= progress;
    } while (progress);
 
-   if (lowered_64bit_ops) {
-      OPT(nir_lower_constant_initializers, nir_var_function_temp);
-      OPT(nir_lower_returns);
-      OPT(nir_inline_functions);
-      OPT(nir_opt_deref);
-   }
-
-   const nir_function *entry_point = nir_shader_get_entrypoint(nir)->function;
-   foreach_list_typed_safe(nir_function, func, node, &nir->functions) {
-      if (func != entry_point) {
-         exec_node_remove(&func->node);
-      }
-   }
-   assert(exec_list_length(&nir->functions) == 1);
-
    if (nir->info.stage == MESA_SHADER_GEOMETRY)
       OPT(nir_lower_gs_intrinsics);
 
@@ -1098,7 +1084,7 @@ brw_nir_create_passthrough_tcs(void *mem_ctx, const struct brw_compiler *compile
 
    nir_validate_shader(nir, "in brw_nir_create_passthrough_tcs");
 
-   nir = brw_preprocess_nir(compiler, nir);
+   nir = brw_preprocess_nir(compiler, nir, NULL);
 
    return nir;
 }