YosysHQ/yosys

Pattern Findings

The scanner identified 297 distinct pattern matches across 15 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.

Over-Commented Block156 hits · 150 pts

Severity	File	Line	Snippet	Context
LOW	.pre-commit-config.yaml	1	# To use:	COMMENT
LOW	techlibs/xilinx/cells_xtra.py	21	# - UG613 (Spartan 3A)	COMMENT
LOW	techlibs/xilinx/cells_xtra.py	41	# Cell('RAM16X2S', port_attrs={'WCLK': ['clkbuf_sink']}),	COMMENT
LOW	techlibs/xilinx/cells_xtra.py	61	# Cell('RAM64X8SW', port_attrs={'WCLK': ['clkbuf_sink']}),	COMMENT
LOW	techlibs/xilinx/cells_xtra.py	81	# Cell('OR2L'),	COMMENT
LOW	techlibs/xilinx/cells_xtra.py	201	# Cell('MULT18X18S', port_attrs={'C': ['clkbuf_sink']}), # Spartan 3	COMMENT
LOW	techlibs/xilinx/cells_xtra.py	381	Cell('BUFMRCE', port_attrs={'O': ['clkbuf_driver']}),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	21	class State(Enum):	COMMENT
LOW	techlibs/lattice/cells_xtra.py	41	#Cell("FD1P3DX"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	61	#Cell("IBPU"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	81	#Cell("MUX41"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	101	#Cell("OR3"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	121	#Cell("XOR3"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	181	]),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	201	#Cell("FD1P3BX"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	221	#Cell("FL1P3IY"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	241	#Cell("INV"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	261	#Cell("MULT2"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	281	#Cell("OFS1P3IX"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	301	#Cell("VHI"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	321	Cell("PDPW8KC"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	341	#Cell("ODDRDQSX1A"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	361	]),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	381	#Cell("FD1P3BX"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	401	#Cell("FL1P3IY"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	421	#Cell("INV"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	441	#Cell("MULT2"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	461	#Cell("OFS1P3IX"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	481	#Cell("VHI"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	501	Cell("PDPW8KC"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	521	#Cell("DQSDLLC"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	541	#Cell("AND2"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	561	#Cell("FD1P3JX"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	581	#Cell("FL1S1AY"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	601	#Cell("LB2P3AY"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	621	#Cell("MUX321"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	641	#Cell("OR2"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	661	#Cell("XNOR3"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	681	Cell("CLKDIVC"),	COMMENT
LOW	techlibs/lattice/cells_xtra.py	701	#Cell("DLLDELC"),	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	1	TEMPLATES = [	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	41	Q <= D;	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	61	output reg Q;	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	81	input D, C, E;	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	141	//-	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	161	end	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	221	//-	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	241	else if (S == {S:0\|1})	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	301	//-	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	321	else	COMMENT
LOW	techlibs/common/gen_fine_ffs.py	341	input E, D;	COMMENT
LOW	techlibs/microchip/LSRAM.txt	1	# ISC License	COMMENT
LOW	techlibs/microchip/LSRAM.txt	21	ram block $__LSRAM_TDP_ {	COMMENT
LOW	techlibs/microchip/uSRAM.txt	1	# ISC License	COMMENT
LOW	techlibs/gatemate/make_lut_tree_lib.py	101	def NOT(arg): return FNode("NOT", arg)	COMMENT
LOW	techlibs/gatemate/make_lut_tree_lib.py	141	# ["$__CC3_AAA", AND(AND(A,B),AND(A,C))],	COMMENT
LOW	frontends/verilog/verilog_lexer.h	1	#ifndef VERILOG_LEXER_H	COMMENT
LOW	backends/smt2/smtbmc.py	1	#!@PYTHON_SHEBANG@	COMMENT
LOW	backends/smt2/witness.py	1	#!@PYTHON_SHEBANG@	COMMENT
LOW	backends/smt2/smtio.py	1	#	COMMENT
96 more matches not shown…

Cross-Language Confusion12 hits · 55 pts

Severity	File	Line	Snippet	Context
HIGH	backends/smt2/smtbmc_incremental.py	177	smt_out.push({"and": "true", "or": "false"}[expr[0]])	CODE
HIGH	passes/pmgen/pmgen.py	434	print(" if (cell != nullptr && blacklist_cells.insert(cell).second) {", file=f)	CODE
HIGH	passes/pmgen/pmgen.py	438	print(" if (rollback == 0 \|\| rollback > rb)", file=f)	CODE
HIGH	passes/pmgen/pmgen.py	786	print(" if (generate_mode && rng(100) < (found_any_match ? {} : {})) {{".format(block["genargs"][1],	CODE
HIGH	tests/gen_tests_makefile.py	55	cmd = f"bash -v {sh_file} >{sh_file}.err 2>&1 && mv {sh_file}.err {sh_file}.log"	CODE
HIGH	tests/memlib/generate_mk.py	443	if (we && ra == wa)	CODE
HIGH	tests/memlib/generate_mk.py	937	if (we && be[i])	CODE
HIGH	tests/memlib/generate_mk.py	1439	("grden", "rden && rst", "old", False, 1), # selects _clken, simulates _rden	STRING
HIGH	tests/memlib/generate_mk.py	1440	("grden_ce", "rden && rst", "old", True, 4), # both of the above	STRING
HIGH	tests/memlib/generate_mk.py	1484	("rdenrst_wr_byte", "rden && rst", ["USE_SRST"], "old", 3),	CODE
HIGH	tests/memfile/generate_mk.py	9	setup = "mkdir -p temp && cp content1.dat temp/content2.dat"	CODE
HIGH	tests/fsm/generate_mk.py	54	print(' assign rst = rst1 \|\| rst2;')	CODE

Deep Nesting55 hits · 54 pts

Severity	File	Line	Context
LOW	techlibs/fix_mod.py	6	CODE
LOW	techlibs/xilinx/cells_xtra.py	607	CODE
LOW	…hlibs/quicklogic/qlf_k6n10f/generate_bram_types_sim.py	3	CODE
LOW	techlibs/lattice/cells_xtra.py	719	CODE
LOW	techlibs/lattice/cells_xtra_nexus.py	175	CODE
LOW	techlibs/gowin/cells_xtra.py	38	CODE
LOW	backends/edif/runtest.py	11	CODE
LOW	backends/smt2/smtbmc.py	730	CODE
LOW	backends/smt2/smtbmc.py	829	CODE
LOW	backends/smt2/smtbmc.py	973	CODE
LOW	backends/smt2/smtbmc.py	1082	CODE
LOW	backends/smt2/smtbmc.py	1166	CODE
LOW	backends/smt2/smtbmc.py	1316	CODE
LOW	backends/smt2/smtbmc.py	1386	CODE
LOW	backends/smt2/smtbmc.py	1684	CODE
LOW	backends/smt2/smtbmc.py	1715	CODE
LOW	backends/smt2/smtbmc_incremental.py	374	CODE
LOW	backends/smt2/witness.py	187	CODE
LOW	backends/smt2/witness.py	365	CODE
LOW	backends/smt2/witness.py	337	CODE
LOW	backends/smt2/smtio.py	345	CODE
LOW	backends/smt2/smtio.py	458	CODE
LOW	backends/smt2/smtio.py	557	CODE
LOW	backends/smt2/smtio.py	819	CODE
LOW	backends/smt2/smtio.py	1195	CODE
LOW	backends/smt2/smtio.py	1311	CODE
LOW	passes/pmgen/pmgen.py	50	CODE
LOW	passes/pmgen/pmgen.py	110	CODE
LOW	tests/tools/txt2tikztiming.py	33	CODE
LOW	tests/bram/generate_mk.py	14	CODE
LOW	tests/abc_new/librelane/construct_abc_script.py	82	CODE
LOW	tests/xprop/test.py	59	CODE
LOW	tests/arch/generate_mk.py	16	CODE
LOW	tests/arch/gatemate/gen_luttrees.py	3	CODE
LOW	tests/rpc/frontend.py	66	CODE
LOW	tests/functional/rkt_vcd.py	13	CODE
LOW	tests/functional/rkt_vcd.py	47	CODE
LOW	tests/functional/smtio.py	321	CODE
LOW	tests/functional/smtio.py	434	CODE
LOW	tests/functional/smtio.py	533	CODE
LOW	tests/functional/smtio.py	795	CODE
LOW	tests/functional/smtio.py	1163	CODE
LOW	tests/functional/smtio.py	1269	CODE
LOW	tests/functional/smt_vcd.py	42	CODE
LOW	tests/functional/smt_vcd.py	15	CODE
LOW	tests/functional/smt_vcd.py	47	CODE
LOW	tests/functional/smt_vcd.py	143	CODE
LOW	tests/functional/rtlil_cells.py	369	CODE
LOW	docs/util/custom_directives.py	68	CODE
LOW	docs/util/cmd_documenter.py	351	CODE
LOW	docs/util/cmd_documenter.py	365	CODE
LOW	pyosys/generator.py	288	CODE
LOW	pyosys/generator.py	320	CODE
LOW	pyosys/generator.py	503	CODE
LOW	pyosys/generator.py	640	CODE

Decorative Section Separators9 hits · 32 pts

Severity	File	Line	Snippet	Context
MEDIUM⚡	tests/simple/generate_mk.py	8	# ----------------------	COMMENT
MEDIUM⚡	tests/simple/generate_mk.py	10	# ----------------------	COMMENT
MEDIUM	tests/arch/analogdevices/mem_gen.py	6	blockram_template = """# ======================================	CODE
MEDIUM	tests/arch/quicklogic/qlf_k6n10f/mem_gen.py	6	blockram_template = """# ======================================	CODE
MEDIUM	tests/rpc/frontend.py	30	# ----------------------------------------------------------------------------	STRING
MEDIUM⚡	tests/simple_abc9/generate_mk.py	10	# ----------------------	COMMENT
MEDIUM⚡	tests/simple_abc9/generate_mk.py	12	# ----------------------	COMMENT
MEDIUM⚡	tests/simple_abc9/generate_mk.py	18	# ----------------------	COMMENT
MEDIUM⚡	tests/simple_abc9/generate_mk.py	20	# ----------------------	COMMENT

Empty Error Handlers6 hits · 30 pts

Severity	File	Line	Snippet	Context
HIGH	backends/smt2/smtio.py	48	except ValueError:	CODE
HIGH	tests/xprop/test.py	55	except FileNotFoundError:	CODE
HIGH	tests/xprop/test.py	45	except FileNotFoundError:	CODE
HIGH	tests/pyosys/run_tests.py	23	except FileNotFoundError:	CODE
HIGH	tests/functional/smtio.py	48	except ValueError:	CODE
HIGH	kernel/cellhelp.py	80	except AttributeError:	CODE

Unused Imports22 hits · 22 pts

Severity	File	Line	Context
LOW	techlibs/gowin/cells_xtra.py	8	CODE
LOW	techlibs/gowin/cells_xtra.py	9	CODE
LOW	backends/smt2/smtbmc.py	20	CODE
LOW	backends/smt2/smtio.py	24	CODE
LOW	tests/tools/txt2tikztiming.py	5	CODE
LOW	tests/svinterfaces/generate_mk.py	3	CODE
LOW	tests/arch/analogdevices/generate_mk.py	7	CODE
LOW	tests/arch/analogdevices/mem_gen.py	1	CODE
LOW	tests/arch/quicklogic/qlf_k6n10f/generate_mk.py	7	CODE
LOW	tests/arch/quicklogic/qlf_k6n10f/mem_gen.py	1	CODE
LOW	tests/functional/rkt_vcd.py	1	CODE
LOW	tests/functional/smtio.py	24	CODE
LOW	tests/functional/smt_vcd.py	1	CODE
LOW	tests/functional/smt_vcd.py	2	CODE
LOW	tests/functional/smt_vcd.py	3	CODE
LOW	tests/functional/rtlil_cells.py	2	CODE
LOW	docs/util/cell_documenter.py	2	CODE
LOW	docs/util/custom_directives.py	3	CODE
LOW	docs/util/cmd_documenter.py	2	CODE
LOW	docs/util/cmd_documenter.py	4	CODE
LOW	examples/python-api/script.py	6	CODE
LOW	kernel/cellhelp.py	3	CODE

AI Slop Vocabulary5 hits · 15 pts

Severity	File	Line	Snippet	Context
MEDIUM	libs/minisat/Vec.h	81	// happen given the way capacities are calculated (below). Essentially, all capacities are	COMMENT
MEDIUM	pyosys/hashlib.h	281	// repr(set(s)) where s is iterable would be more terse/robust	COMMENT
MEDIUM	pyosys/hashlib.h	408	// repr(dict(s)) where s is iterable would be more terse/robust	COMMENT
MEDIUM	pyosys/hashlib.h	512	// repr(dict(s)) where s is iterable would be more terse/robust	COMMENT
MEDIUM	kernel/drivertools.h	1118	// Essentially a dict<DriveBitId, pool<DriveBitId>> but using less memory	COMMENT

Excessive Try-Catch Wrapping7 hits · 10 pts

Severity	File	Line	Snippet	Context
LOW	backends/smt2/smtbmc_incremental.py	612	except Exception as e:	CODE
MEDIUM⚡	tests/simple/generate_mk.py	12	print("Error: Icarus Verilog 'iverilog' not found.", file=sys.stderr)	CODE
LOW	tests/memories/validate.py	86	except Exception as e:	CODE
LOW	tests/memories/validate.py	92	except Exception as e:	CODE
MEDIUM⚡	tests/simple_abc9/generate_mk.py	14	print("Error: Icarus Verilog 'iverilog' not found.", file=sys.stderr)	CODE
LOW	docs/util/cell_documenter.py	221	except Exception as exc:	STRING
LOW	docs/util/cmd_documenter.py	263	except Exception as exc:	STRING

Hyper-Verbose Identifiers12 hits · 10 pts

Severity	File	Line	Snippet	Context
LOW	backends/smt2/smtbmc.py	1490	def print_failed_asserts_worker(mod, state, path, extrainfo, infomap, infokey=()):	STRING
LOW	backends/smt2/smtbmc.py	1628	def smt_assert_design_assumes(step):	STRING
LOW	backends/smt2/smtbmc.py	1802	def report_tracked_assumptions(msg):	STRING
LOW	backends/smt2/smtbmc_incremental.py	427	def cmd_assert_design_assumes(self, cmd):	CODE
LOW	backends/smt2/smtbmc_incremental.py	447	def cmd_get_unsat_assumptions(self, cmd):	CODE
LOW	backends/smt2/smtio.py	985	def get_raw_unsat_assumptions(self):	CODE
LOW	tests/functional/test_smtbmc_witness_mismatch.py	76	def assert_no_mismatch_message(result):	CODE
LOW	tests/functional/test_smtbmc_witness_mismatch.py	82	def assert_has_mismatch_message(result, msg):	CODE
LOW	tests/functional/test_smtbmc_witness_mismatch.py	143	def test_allowed_extra_signal_in_design(tmp_path):	STRING
LOW	tests/functional/test_smtbmc_witness_mismatch.py	169	def test_allowed_extra_memory_in_design(tmp_path):	STRING
LOW	tests/functional/smtio.py	961	def get_raw_unsat_assumptions(self):	CODE
LOW	pyosys/generator.py	371	def make_preprocessor_options(self, build_dir):	CODE

Example Usage Blocks3 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	tests/vloghtb/common.sh	13	# Usage:	COMMENT
LOW	tests/vloghtb/common.sh	40	# Usage:	COMMENT
LOW	tests/vloghtb/common.sh	74	# Usage:	COMMENT

Redundant / Tautological Comments2 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW⚡	tests/simple/generate_mk.py	9	# Check if iverilog is installed	COMMENT
LOW⚡	tests/simple_abc9/generate_mk.py	11	# Check if iverilog is installed	COMMENT

Modern Structural Boilerplate4 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	docs/util/cell_documenter.py	15	logger = logging.getLogger(__name__)	CODE
LOW	docs/util/RtlilLexer.py	4	__all__ = ['RtlilLexer']	CODE
LOW	docs/util/cmd_documenter.py	15	logger = logging.getLogger(__name__)	CODE
LOW	pyosys/modinit.py	19	__all__ = ["libyosys"]	CODE

Self-Referential Comments1 hit · 3 pts

Severity	File	Line	Snippet	Context
MEDIUM	tests/functional/smt_vcd.py	136	# Create a single assertion covering all timesteps	COMMENT

Slop Phrases2 hits · 3 pts

Severity	File	Line	Snippet	Context
LOW	.github/workflows/test-compile.yml	50	# newest, make sure to update maximum standard step to match	COMMENT
LOW	.github/actions/setup-build-env/action.yml	32	# if updating common/build/docs dependencies, make sure to update README.md	COMMENT

AI Structural Patterns1 hit · 1 pts

Severity	File	Line	Snippet	Context
LOW	docs/util/cmd_documenter.py	61		CODE

Maintenance and Governance Review

Risk Review · v3

What These Metrics Mean

Pattern-Signal History

Severity Breakdown

Directory Score Breakdown

Pattern Findings