Revert "Revert "Don't use auto for temp_var_type""

This reverts commit da0a6c31.

sumpy/codegen.py

@@ -705,7 +705,7 @@ def to_loopy_insns(assignments, vector_names=set(), pymbolic_expr_maps=[],
         result = [
                 lp.Assignment(id=None,
                     assignee=name, expression=convert_expr(name, expr),
-                    temp_var_type=lp.auto)
+                    temp_var_type=lp.Optional(None))
                 for name, expr in assignments]
 
     logger.info("loopy instruction generation: done")

sumpy/e2p.py

@@ -119,7 +119,7 @@ class E2PBase(KernelCacheWrapper):
                     assignee="kernel_scaling",
                     expression=sympy_conv(
                         self.expansion.kernel.get_global_scaling_const()),
-                    temp_var_type=lp.auto)]
+                    temp_var_type=lp.Optional(None))]
 
     def get_cache_key(self):
         return (type(self).__name__, self.expansion, tuple(self.kernels))

sumpy/p2p.py

@@ -125,7 +125,7 @@ class P2PBase(KernelComputation, KernelCacheWrapper):
 
         return [lp.Assignment(id=None,
                     assignee="pair_result_%d" % i, expression=expr,
-                    temp_var_type=lp.auto)
+                    temp_var_type=lp.Optional(None))
                 for i, expr in enumerate(exprs)]
 
     def get_default_src_tgt_arguments(self):

sumpy/qbx.py

@@ -143,7 +143,7 @@ class LayerPotentialBase(KernelComputation, KernelCacheWrapper):
 
         return [lp.Assignment(id=None,
                     assignee="pair_result_%d" % i, expression=expr,
-                    temp_var_type=lp.auto)
+                    temp_var_type=lp.Optional(None))
                 for i, expr in enumerate(exprs)]
 
     def get_default_src_tgt_arguments(self):