[PATCH 5/8] vkd3d-shader/hlsl: Absorv hlsl_ir_constant deref offsets into offset_const.

[Francisco Casas]

From: Francisco Casas

---
 libs/vkd3d-shader/hlsl_codegen.c | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 9f4e367bd..e25396a79 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -175,6 +175,24 @@ static bool replace_deref_path_with_offset(struct hlsl_ctx *ctx, struct hlsl_der
     return true;
 }

+static bool clean_constant_deref_offset_srcs(struct hlsl_ctx *ctx, struct hlsl_deref *deref,
+        struct hlsl_ir_node *instr)
+{
+    if (deref->offset.node && deref->offset.node->type == HLSL_IR_CONSTANT)
+    {
+        enum hlsl_regset regset = hlsl_deref_get_regset(ctx, deref);
+
+        if (regset == HLSL_REGSET_NUMERIC)
+            deref->offset_const += 4 * hlsl_ir_constant(deref->offset.node)->value.u[0].u;
+        else
+            deref->offset_const += hlsl_ir_constant(deref->offset.node)->value.u[0].u;
+        hlsl_src_remove(&deref->offset);
+        return true;
+    }
+    return false;
+}
+
+
 /* Split uniforms into two variables representing the constant and temp
  * registers, and copy the former to the latter, so that writes to uniforms
  * work. */
@@ -4221,14 +4239,8 @@ bool hlsl_offset_from_deref(struct hlsl_ctx *ctx, const struct hlsl_deref *deref
         /* We should always have generated a cast to UINT. */
         assert(offset_node->data_type->class == HLSL_CLASS_SCALAR
                 && offset_node->data_type->base_type == HLSL_TYPE_UINT);
-
-        if (offset_node->type != HLSL_IR_CONSTANT)
-            return false;
-
-        if (regset == HLSL_REGSET_NUMERIC)
-            *offset += 4 * hlsl_ir_constant(offset_node)->value.u[0].u;
-        else
-            *offset += hlsl_ir_constant(offset_node)->value.u[0].u;
+        assert(offset_node->type != HLSL_IR_CONSTANT);
+        return false;
     }

size = deref->var->data_type->reg_size[regset];
@@ -4487,6 +4499,7 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry
     /* TODO: move forward, remove when no longer needed */
     transform_derefs(ctx, replace_deref_path_with_offset, body);
     while (hlsl_transform_ir(ctx, hlsl_fold_constant_exprs, body, NULL));
+    transform_derefs(ctx, clean_constant_deref_offset_srcs, body);

do
         compute_liveness(ctx, entry_func);