Merge pull request #1763 from boqwxp/issue1762

Closes #1762. Adds warnings for `select` arguments not matching any object and for `add` command when no modules selected

tests/select/no_warn_assert.ys

@@ -0,0 +1,2 @@
+logger -expect-no-warnings
+select -assert-count 0 top/t:ff4 top/w:d0 %co:+[d] %i

tests/select/no_warn_prefixed_arg_memb.ys

@@ -0,0 +1,5 @@
+logger -expect-no-warnings
+read_verilog ../../examples/igloo2/example.v
+hierarchy
+proc
+select example/t:$add

tests/select/no_warn_prefixed_empty_select_arg.ys

@@ -0,0 +1,3 @@
+logger -expect-no-warnings
+select n:foo/bar*
+select t:$assert

tests/select/run-test.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+for x in *.ys; do
+  echo "Running $x.."
+  ../../yosys -ql ${x%.ys}.log $x
+done

tests/select/warn_empty_select_arg.ys

@@ -0,0 +1,3 @@
+logger -expect warning "did not match any module." 1
+logger -expect warning "did not match any object." 1
+select foo/bar