[FRONTEND] Removed circular import that broke Python 3.6 support (#272)

lib/codegen/analysis/swizzle.cc

@@ -30,7 +30,7 @@ void swizzle::run(ir::module &) {
       if(!in_layout)
         continue;
       int dtsize = layout->get_type()->get_scalar_ty()->get_primitive_size_in_bits() / 8;
-      if(tgt_->as_nvidia()->sm() < 80){
+      if(tgt_->as_nvidia() && tgt_->as_nvidia()->sm() < 80){
         int inner = mma_dot_a ? 0 : 1;
         per_phase_[layout] = std::max<int>(128 / (in_layout->mts(ord[0])*in_layout->nts(ord[0])*dtsize), 1);
         max_phase_[layout] = (ord[inner] == 1 ? 8 : 4) / per_phase_[layout];

lib/codegen/transform/peephole.cc

@@ -285,7 +285,7 @@ void peephole::run(ir::module &mod) {
       was_modified = was_modified || rewrite_gep_ptr_min_off_plus_off(i, builder);
       was_modified = was_modified || rewrite_select_masked_load(i, builder);
       was_modified = was_modified || rewrite_cvt_layout(i, builder);
-      if(tgt_->as_nvidia()->sm() >= 80)
+      if(tgt_->as_nvidia() && tgt_->as_nvidia()->sm() >= 80)
         was_modified = was_modified || rewrite_load_to_shared(i, builder);
       if(was_modified)
         seen.insert(i);

lib/codegen/transform/prefetch.cc

@@ -83,7 +83,7 @@ void prefetch::run(ir::module &mod) {
   }
 
   // move loads to the beginning of the loop
-  if (tgt_->as_nvidia()->sm() < 80) {
+  if (tgt_->as_nvidia() && tgt_->as_nvidia()->sm() < 80) {
     for (ir::function *fn : mod.get_function_list())
     for (ir::basic_block *bb : fn->blocks()) {
       // only apply to loop body

python/triton/language/random.py

@@ -1,5 +1,5 @@
 import triton
-import triton.language as tl
+from . import core as tl
 
 
 # Notes