Author: cbieneman
Date: Mon Mar 21 21:55:40 2016
New Revision: 264021
URL: http://llvm.org/viewvc/llvm-project?rev=264021&view=rev
Log:
[Perf-training] Fixing an issue with multi-threading PGO generation
When LIT parallelizes the profraw file generation we need to generate unique
temp filenames then clean them up after the driver executes.
Modified:
cfe/trunk/utils/perf-training/perf-helper.py
Modified: cfe/trunk/utils/perf-training/perf-helper.py
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/utils/perf-training/perf-helper.py?rev=264021&r1=264020&r2=264021&view=diff
==============================================================================
--- cfe/trunk/utils/perf-training/perf-helper.py (original)
+++ cfe/trunk/utils/perf-training/perf-helper.py Mon Mar 21 21:55:40 2016
@@ -16,6 +16,7 @@ import argparse
import time
import bisect
import shlex
+import tempfile
test_env = { 'PATH' : os.environ['PATH'] }
@@ -149,10 +150,12 @@ def cc1(args):
# clear the profile file env, so that we don't generate profdata
# when capturing the cc1 command
+ handle, profraw_file = tempfile.mkstemp()
+ os.close(handle)
cc1_env = test_env
- cc1_env["LLVM_PROFILE_FILE"] = "driver.prfraw"
+ cc1_env["LLVM_PROFILE_FILE"] = profraw_file
cc1_cmd = get_cc1_command_for_args(cmd, cc1_env)
- os.remove("driver.prfraw")
+ os.remove(profraw_file)
subprocess.check_call(cc1_cmd)
return 0;
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