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smtbmc: escape path identifiers 

* also changes the print format for cover statements to be more uniform
  with the asserts, allowing easier parsing of cover path
* this allows diambiguation of properties with the same name but
  different paths (see https://github.com/YosysHQ/sby/issues/296)
This commit is contained in:
George Rennie 2024-09-24 03:01:49 +01:00
parent 8e1e2b9a39
commit b788de9329
1 changed files with 19 additions and 8 deletions
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27
backends/smt2/smtbmc.py
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@ -1454,6 +1454,10 @@ def write_trace(steps_start, steps_stop, index, allregs=False):
if outywfile is not None:
write_yw_trace(steps, index, allregs)
def escape_path_segment(segment):
if "." in segment:
return f"\\{segment} "
return segment
def print_failed_asserts_worker(mod, state, path, extrainfo, infomap, infokey=()):
assert mod in smt.modinfo
@ -1464,7 +1468,8 @@ def print_failed_asserts_worker(mod, state, path, extrainfo, infomap, infokey=()
for cellname, celltype in smt.modinfo[mod].cells.items():
cell_infokey = (mod, cellname, infokey)
if print_failed_asserts_worker(celltype, "(|%s_h %s| %s)" % (mod, cellname, state), path + "." + cellname, extrainfo, infomap, cell_infokey):
cell_path = path + "." + escape_path_segment(cellname)
if print_failed_asserts_worker(celltype, "(|%s_h %s| %s)" % (mod, cellname, state), cell_path, extrainfo, infomap, cell_infokey):
found_failed_assert = True
for assertfun, assertinfo in smt.modinfo[mod].asserts.items():
@ -1497,7 +1502,7 @@ def print_anyconsts_worker(mod, state, path):
assert mod in smt.modinfo
for cellname, celltype in smt.modinfo[mod].cells.items():
print_anyconsts_worker(celltype, "(|%s_h %s| %s)" % (mod, cellname, state), path + "." + cellname)
print_anyconsts_worker(celltype, "(|%s_h %s| %s)" % (mod, cellname, state), path + "." + escape_path_segment(cellname))
for fun, info in smt.modinfo[mod].anyconsts.items():
if info[1] is None:
@ -1517,18 +1522,21 @@ def print_anyconsts(state):
print_anyconsts_worker(topmod, "s%d" % state, topmod)
def get_cover_list(mod, base):
def get_cover_list(mod, base, path=None):
path = path or mod
assert mod in smt.modinfo
cover_expr = list()
# A tuple of path and cell name
cover_desc = list()
for expr, desc in smt.modinfo[mod].covers.items():
cover_expr.append("(ite (|%s| %s) #b1 #b0)" % (expr, base))
cover_desc.append(desc)
cover_desc.append((path, desc))
for cell, submod in smt.modinfo[mod].cells.items():
e, d = get_cover_list(submod, "(|%s_h %s| %s)" % (mod, cell, base))
cell_path = path + "." + escape_path_segment(cell)
e, d = get_cover_list(submod, "(|%s_h %s| %s)" % (mod, cell, base), cell_path)
cover_expr += e
cover_desc += d
@ -1544,7 +1552,8 @@ def get_assert_map(mod, base, path, key_base=()):
assert_map[(expr, key_base)] = ("(|%s| %s)" % (expr, base), path, desc)
for cell, submod in smt.modinfo[mod].cells.items():
assert_map.update(get_assert_map(submod, "(|%s_h %s| %s)" % (mod, cell, base), path + "." + cell, (mod, cell, key_base)))
cell_path = path + "." + escape_path_segment(cell)
assert_map.update(get_assert_map(submod, "(|%s_h %s| %s)" % (mod, cell, base), cell_path, (mod, cell, key_base)))
return assert_map
@ -1903,7 +1912,9 @@ elif covermode:
new_cover_mask.append(cover_mask[i])
continue
print_msg("Reached cover statement at %s in step %d." % (cover_desc[i], step))
path = cover_desc[i][0]
name = cover_desc[i][1]
print_msg("Reached cover statement in step %d at %s: %s" % (step, path, name))
new_cover_mask.append("0")
cover_mask = "".join(new_cover_mask)
@ -1933,7 +1944,7 @@ elif covermode:
if "1" in cover_mask:
for i in range(len(cover_mask)):
if cover_mask[i] == "1":
print_msg("Unreached cover statement at %s." % cover_desc[i])
print_msg("Unreached cover statement at %s: %s" % (cover_desc[i][0], cover_desc[i][1]))
else: # not tempind, covermode
active_assert_keys = get_assert_keys()