schedcover.py

#!/usr/bin/env python

# This creates a CSV file from the output of the debug output of subtarget:
# llvm-tblgen --gen-subtarget --debug-only=subtarget-emitter
# With thanks to Dave Estes for mentioning the idea at 2014 LLVM Developers' Meeting

importos;
importsys;
importre;
importoperator;

table= {}
models=set()
filt=None

defadd(instr, model, resource=None):
globaltable, models

entry=table.setdefault(instr, dict())
entry[model] =resource
models.add(model)

deffilter_model(m):
globalfilt
ifmandfilt:
returnfilt.search(m) !=None
else:
returnTrue


defdisplay():
globaltable, models

# remove default and itinerary so we can control their sort order to make
# them first
models.discard("default")
models.discard("itinerary")

ordered_table=sorted(table.items(), key=operator.itemgetter(0))
ordered_models= ["itinerary", "default"]
ordered_models.extend(sorted(models))
ordered_models= [mforminordered_modelsiffilter_model(m)]

# print header
sys.stdout.write("instruction")
formodelinordered_models:
sys.stdout.write(", {}".format(model))
sys.stdout.write(os.linesep)

for (instr, mapping) inordered_table:
sys.stdout.write(instr)
formodelinordered_models:
ifmodelinmappingandmapping[model] isnotNone:
sys.stdout.write(", {}".format(mapping[model]))
else:
sys.stdout.write(", ")
sys.stdout.write(os.linesep)


defmachineModelCover(path):
# The interesting bits
re_sched_default=re.compile("SchedRW machine model for ([^ ]*) (.*)\n");
re_sched_no_default=re.compile("No machine model for ([^ ]*)\n");
re_sched_spec=re.compile("InstRW on ([^ ]*) for ([^ ]*) (.*)\n");
re_sched_no_spec=re.compile("No machine model for ([^ ]*) on processor (.*)\n");
re_sched_itin=re.compile("Itinerary for ([^ ]*): ([^ ]*)\n")

# scan the file
withopen(path, 'r') asf:
forlineinf.readlines():
match=re_sched_default.match(line)
ifmatch: add(match.group(1), "default", match.group(2))
match=re_sched_no_default.match(line)
ifmatch: add(match.group(1), "default")
match=re_sched_spec.match(line)
ifmatch: add(match.group(2), match.group(1), match.group(3))
match=re_sched_no_spec.match(line)
ifmatch: add(match.group(1), match.group(2))
match=re_sched_itin.match(line)
ifmatch: add(match.group(1), "itinerary", match.group(2))

display()

iflen(sys.argv) >2:
filt=re.compile(sys.argv[2], re.IGNORECASE)
machineModelCover(sys.argv[1])