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[utils] Use stricter SSA regexp for CHECK-SAME. #128083

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Feb 21, 2025
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15 changes: 12 additions & 3 deletions mlir/utils/generate-test-checks.py
Original file line number Diff line number Diff line change
Expand Up @@ -159,7 +159,7 @@ def get_num_ssa_results(input_line):


# Process a line of input that has been split at each SSA identifier '%'.
def process_line(line_chunks, variable_namer):
def process_line(line_chunks, variable_namer, strict_name_re=False):
output_line = ""

# Process the rest that contained an SSA value name.
Expand All @@ -180,7 +180,14 @@ def process_line(line_chunks, variable_namer):
else:
# Otherwise, generate a new variable.
variable = variable_namer.generate_name(ssa_name)
output_line += "%[[" + variable + ":.*]]"
if strict_name_re:
# Use stricter regexp for the variable name, if requested.
# Greedy matching may cause issues with the generic '.*'
# regexp when the checks are split across several
# lines (e.g. for CHECK-SAME).
output_line += "%[[" + variable + ":" + SSA_RE_STR + "]]"
else:
output_line += "%[[" + variable + ":.*]]"

# Append the non named group.
output_line += chunk[len(ssa_name) :]
Expand Down Expand Up @@ -390,7 +397,9 @@ def main():
output_line += " " * len(ssa_split[0])

# Process the rest of the line.
output_line += process_line([argument], variable_namer)
output_line += process_line(
[argument], variable_namer, strict_name_re=True
)

# Append the output line.
output_segments[-1].append(output_line)
Expand Down