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-rw-r--r--src/mesa/program/ir_to_mesa.cpp48
1 files changed, 44 insertions, 4 deletions
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index f0e14b8ece..839d6f0467 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -882,13 +882,53 @@ ir_to_mesa_visitor::visit(ir_variable *ir)
void
ir_to_mesa_visitor::visit(ir_loop *ir)
{
- assert(!ir->from);
- assert(!ir->to);
- assert(!ir->increment);
- assert(!ir->counter);
+ ir_dereference_variable *counter = NULL;
+
+ if (ir->counter != NULL)
+ counter = new(ir) ir_dereference_variable(ir->counter);
+
+ if (ir->from != NULL) {
+ assert(ir->counter != NULL);
+
+ ir_assignment *a = new(ir) ir_assignment(counter, ir->from, NULL);
+
+ a->accept(this);
+ delete a;
+ }
ir_to_mesa_emit_op0(NULL, OPCODE_BGNLOOP);
+
+ if (ir->to) {
+ ir_expression *e =
+ new(ir) ir_expression(ir->cmp, glsl_type::bool_type,
+ counter, ir->to);
+ ir_if *if_stmt = new(ir) ir_if(e);
+
+ ir_loop_jump *brk = new(ir) ir_loop_jump(ir_loop_jump::jump_break);
+
+ if_stmt->then_instructions.push_tail(brk);
+
+ if_stmt->accept(this);
+
+ delete if_stmt;
+ delete e;
+ delete brk;
+ }
+
visit_exec_list(&ir->body_instructions, this);
+
+ if (ir->increment) {
+ ir_expression *e =
+ new(ir) ir_expression(ir_binop_add, counter->type,
+ counter, ir->increment);
+
+ ir_assignment *a = new(ir) ir_assignment(counter, e, NULL);
+
+ a->accept(this);
+ delete a;
+ delete e;
+ }
+
ir_to_mesa_emit_op0(NULL, OPCODE_ENDLOOP);
}