Mesa (master): glsl_to_tgsi: emit multi-level structs and arrays properly.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 5cdcd7251a213a448f2bfaf0e7527213c8afa3f5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5cdcd7251a213a448f2bfaf0e7527213c8afa3f5

Author: Dave Airlie <airlied at gmail.com>
Date:   Mon Dec 10 17:20:05 2012 +1000

glsl_to_tgsi: emit multi-level structs and arrays properly.

This follow the code from the i965 driver, and emits the structs
and arrays recursively.

This fixes an assert in the two UBO tests
fs-struct-copy-complicated and
vs-struct-copy-complicated

These tests now pass on softpipe, with no regressions.

Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/mesa/state_tracker/st_glsl_to_tgsi.cpp |   51 +++++++++++++++++++++++-----
 1 files changed, 42 insertions(+), 9 deletions(-)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index a4df4e5..1d96e90 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -442,6 +442,9 @@ public:
    void merge_registers(void);
    void renumber_registers(void);
 
+   void emit_block_mov(ir_assignment *ir, const struct glsl_type *type,
+                       st_dst_reg *l, st_src_reg *r);
+
    void *mem_ctx;
 };
 
@@ -2244,6 +2247,44 @@ glsl_to_tgsi_visitor::process_move_condition(ir_rvalue *ir)
 }
 
 void
+glsl_to_tgsi_visitor::emit_block_mov(ir_assignment *ir, const struct glsl_type *type,
+                                     st_dst_reg *l, st_src_reg *r)
+{
+   if (type->base_type == GLSL_TYPE_STRUCT) {
+      for (unsigned int i = 0; i < type->length; i++) {
+         emit_block_mov(ir, type->fields.structure[i].type, l, r);
+      }
+      return;
+   }
+
+   if (type->is_array()) {
+      for (unsigned int i = 0; i < type->length; i++) {
+         emit_block_mov(ir, type->fields.array, l, r);
+      }
+      return;
+   }
+
+   if (type->is_matrix()) {
+      const struct glsl_type *vec_type;
+
+      vec_type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
+					 type->vector_elements, 1);
+
+      for (int i = 0; i < type->matrix_columns; i++) {
+         emit_block_mov(ir, vec_type, l, r);
+      }
+      return;
+   }
+
+   assert(type->is_scalar() || type->is_vector());
+
+   r->type = type->base_type;
+   emit(ir, TGSI_OPCODE_MOV, *l, *r);
+   l->index++;
+   r->index++;
+}
+
+void
 glsl_to_tgsi_visitor::visit(ir_assignment *ir)
 {
    st_dst_reg l;
@@ -2347,15 +2388,7 @@ glsl_to_tgsi_visitor::visit(ir_assignment *ir)
       new_inst->saturate = inst->saturate;
       inst->dead_mask = inst->dst.writemask;
    } else {
-      for (i = 0; i < type_size(ir->lhs->type); i++) {
-         if (ir->rhs->type->is_array())
-         	r.type = ir->rhs->type->element_type()->base_type;
-         else if (ir->rhs->type->is_record())
-         	r.type = ir->rhs->type->fields.structure[i].type->base_type;
-         emit(ir, TGSI_OPCODE_MOV, l, r);
-         l.index++;
-         r.index++;
-      }
+      emit_block_mov(ir, ir->rhs->type, &l, &r);
    }
 }