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[llvm-exegesis] Also check latency mode in local lit.
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Authored by courbet on Dec 7 2018, 12:58 AM.

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Summary

This should avoid failing on old CPUs that do not have a cycle counter.

LGTM

This revision is now accepted and ready to land.Dec 7 2018, 2:22 PM

This revision was automatically updated to reflect the committed changes.

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llvm/

trunk/

test/

tools/

llvm-exegesis/

X86/

8 lines

Show All 14 Lines	else:
# code snippet and bail out on error.		# code snippet and bail out on error.
llvm_exegesis_exe = lit.util.which('llvm-exegesis', config.llvm_tools_dir)		llvm_exegesis_exe = lit.util.which('llvm-exegesis', config.llvm_tools_dir)
if not llvm_exegesis_exe:		if not llvm_exegesis_exe:
print('llvm-exegesis not found')		print('llvm-exegesis not found')
config.unsupported = True		config.unsupported = True
else:		else:
try:		try:
with open(os.devnull, 'w') as quiet:		with open(os.devnull, 'w') as quiet:
check_llvm_exegesis_result = subprocess.call(		check_llvm_exegesis_uops_result = subprocess.call(
[llvm_exegesis_exe, '-mode', 'uops', '-snippets-file', '/dev/null'], stdout=quiet, stderr=quiet)		[llvm_exegesis_exe, '-mode', 'uops', '-snippets-file', '/dev/null'], stdout=quiet, stderr=quiet)
		check_llvm_exegesis_latency_result = subprocess.call(
		[llvm_exegesis_exe, '-mode', 'latency', '-snippets-file', '/dev/null'], stdout=quiet, stderr=quiet)
except OSError:		except OSError:
print('could not exec llvm-exegesis')		print('could not exec llvm-exegesis')
config.unsupported = True		config.unsupported = True
if not check_llvm_exegesis_result == 0:		if not check_llvm_exegesis_uops_result == 0:
		config.unsupported = True
		if not check_llvm_exegesis_latency_result == 0:
config.unsupported = True		config.unsupported = True