[CODEGEN] Various bugfixes and stability improvements in compiler backend (#240)

lib/ir/dispatch.cc

@@ -374,12 +374,15 @@ ir::value *dispatch::broadcast(ir::value *input, shape_t shape, ir::builder *bui
   auto src_shape = input->get_type()->get_block_shapes();
   if (src_shape.size() != shape.size())
     throw std::runtime_error("Cannot broadcast");
+  if(shape == src_shape)
+    return input;
   return builder->create_broadcast(input, shape);
 }
 
 std::tuple<ir::value*, ir::value*> dispatch::broadcast(ir::value *lhs, ir::value* rhs, ir::builder *builder) {
   ir::type *lhs_ty = lhs->get_type();
   ir::type *rhs_ty = rhs->get_type();
+
   // make_shape_compatible(block, scalar)
   if (lhs_ty->is_block_ty() && !rhs_ty->is_block_ty())
     rhs = builder->create_splat(rhs, lhs_ty->get_block_shapes());

lib/ir/instructions.cc

@@ -806,6 +806,11 @@ instruction* log_inst::create(value *val, const std::string& name, instruction *
 //                               intrinsic instructions
 //===----------------------------------------------------------------------===//
 
+// cvt_scanline
+cvt_layout_inst* cvt_layout_inst::create(value *arg, const std::string &name, instruction *next) {
+  return new cvt_layout_inst(arg->get_type(), INST_CVT_LAYOUT, arg, name, next);
+}
+
 // copy to shared
 copy_to_shared_inst* copy_to_shared_inst::create(value *arg, const std::string &name,
                                                  instruction *next) {
@@ -818,13 +823,6 @@ copy_from_shared_inst* copy_from_shared_inst::create(value *arg, const std::stri
   return new copy_from_shared_inst(arg->get_type(), INST_COPY_FROM_SHARED, arg, name, next);
 }
 
-// recoalesce
-recoalesce_inst* recoalesce_inst::create(value *arg, const std::string &name, instruction *next) {
-  return new recoalesce_inst(arg->get_type(), INST_RECOALESCE, arg, name, next);
-}
-
-
-
 // barrier
 barrier_inst::barrier_inst(context &ctx, const std::string &name,
                                                        instruction *next)