nir/lower_point_size: Use shader_instructions_pass

Sleepy code deletion mood.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21750>

diff --git a/src/compiler/nir/nir_lower_point_size.c b/src/compiler/nir/nir_lower_point_size.c
index 0933bd9..3781b12 100644 (file)
--- a/src/compiler/nir/nir_lower_point_size.c
+++ b/src/compiler/nir/nir_lower_point_size.c
@@ -32,31 +32,11 @@
  * the driver must clamp the point size written by the shader manually to a
  * valid range.
  */
-
-static void
-lower_point_size_instr(nir_builder *b, nir_instr *psiz_instr,
-                       float min, float max)
-{
-   b->cursor = nir_before_instr(psiz_instr);
-
-   nir_intrinsic_instr *instr = nir_instr_as_intrinsic(psiz_instr);
-
-   assert(instr->src[1].is_ssa);
-   assert(instr->src[1].ssa->num_components == 1);
-   nir_ssa_def *psiz = instr->src[1].ssa;
-
-   if (min > 0.0f)
-      psiz = nir_fmax(b, psiz, nir_imm_float(b, min));
-
-   if (max > 0.0f)
-      psiz = nir_fmin(b, psiz, nir_imm_float(b, max));
-
-   nir_instr_rewrite_src(&instr->instr, &instr->src[1], nir_src_for_ssa(psiz));
-}
-
 static bool
-instr_is_point_size(const nir_instr *instr)
+lower_point_size_instr(nir_builder *b, nir_instr *instr, void *data)
 {
+   float *minmax = (float *)data;
+
    if (instr->type != nir_instr_type_intrinsic)
       return false;
 
@@ -69,6 +49,20 @@ instr_is_point_size(const nir_instr *instr)
    if (var->data.location != VARYING_SLOT_PSIZ)
       return false;
 
+   b->cursor = nir_before_instr(instr);
+
+   assert(intr->src[1].is_ssa);
+   assert(intr->src[1].ssa->num_components == 1);
+   nir_ssa_def *psiz = intr->src[1].ssa;
+
+   if (minmax[0] > 0.0f)
+      psiz = nir_fmax(b, psiz, nir_imm_float(b, minmax[0]));
+
+   if (minmax[1] > 0.0f)
+      psiz = nir_fmin(b, psiz, nir_imm_float(b, minmax[1]));
+
+   nir_instr_rewrite_src(instr, &intr->src[1], nir_src_for_ssa(psiz));
+
    return true;
 }
 
@@ -85,29 +79,8 @@ nir_lower_point_size(nir_shader *s, float min, float max)
    assert(min > 0.0f || max > 0.0f);
    assert(min <= 0.0f || max <= 0.0f || min <= max);
 
-   bool progress = false;
-   nir_foreach_function(function, s) {
-      if (!function->impl)
-         continue;
-
-      nir_builder b;
-      nir_builder_init(&b, function->impl);
-
-      nir_foreach_block(block, function->impl) {
-         nir_foreach_instr_safe(instr, block) {
-            if (instr_is_point_size(instr)) {
-               lower_point_size_instr(&b, instr, min, max);
-               progress = true;
-            }
-         }
-      }
-
-      if (progress) {
-         nir_metadata_preserve(function->impl,
-                               nir_metadata_block_index |
-                               nir_metadata_dominance);
-      }
-   }
-
-   return progress;
+   float minmax[] = {min, max};
+   return nir_shader_instructions_pass(s, lower_point_size_instr,
+                                       nir_metadata_block_index |
+                                       nir_metadata_dominance, minmax);
 }