feat[venom]: add dead store elimination pass

tests/functional/codegen/types/test_dynamic_array.py

@@ -13,7 +13,6 @@
     CompilerPanic,
     ImmutableViolation,
     OverflowException,
-    StackTooDeep,
     StateAccessViolation,
     StaticAssertionException,
     TypeMismatch,
@@ -291,7 +290,6 @@ def test_array(x: int128, y: int128, z: int128, w: int128) -> int128:
     assert c.test_array(2, 7, 1, 8) == -5454
 
 
-@pytest.mark.venom_xfail(raises=StackTooDeep, reason="stack scheduler regression")
 def test_four_d_array_accessor(get_contract):
     four_d_array_accessor = """
 @external

tests/functional/codegen/types/test_lists.py

@@ -7,7 +7,7 @@
 from tests.utils import check_precompile_asserts, decimal_to_int
 from vyper.compiler.settings import OptimizationLevel
 from vyper.evm.opcodes import version_check
-from vyper.exceptions import ArrayIndexException, OverflowException, StackTooDeep, TypeMismatch
+from vyper.exceptions import ArrayIndexException, OverflowException, TypeMismatch
 
 
 def _map_nested(f, xs):
@@ -193,7 +193,6 @@ def test_array(x: int128, y: int128, z: int128, w: int128) -> int128:
     assert c.test_array(2, 7, 1, 8) == -5454
 
 
-@pytest.mark.venom_xfail(raises=StackTooDeep, reason="stack scheduler regression")
 def test_four_d_array_accessor(get_contract):
     four_d_array_accessor = """
 @external

tests/unit/compiler/test_source_map.py

@@ -142,8 +142,8 @@ def foo(i: uint256):
     raise self.bar(5%i)
 
 @pure
-def bar(i: uint256) -> String[32]:
-    return "foo foo"
+def bar(i: uint256) -> String[85]:
+    return concat("foo foo", uint2str(i))
     """
     error_map = compile_code(code, output_formats=["source_map"])["source_map"]["error_map"]
     assert "user revert with reason" in error_map.values()