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make profile-bolt-stamp
make[1]: Entering directory '/big/workspace/cpython'
# Ensure a pristine, pre-BOLT copy of the binary and no profile data from last run.
for bin in python; do \
  prebolt="${bin}.prebolt"; \
  if [ -e "${prebolt}" ]; then \
    echo "Restoring pre-BOLT binary ${prebolt}"; \
    mv "${bin}.prebolt" "${bin}"; \
  fi; \
  cp "${bin}" "${prebolt}"; \
  rm -f ${bin}.bolt.*.fdata ${bin}.fdata; \
done
# Instrument each binary.
for bin in python; do \
  /usr/bin/llvm-bolt "${bin}" -instrument -instrumentation-file-append-pid -instrumentation-file=/big/workspace/cpython/${bin}.bolt -o ${bin}.bolt_inst ; \
  mv "${bin}.bolt_inst" "${bin}"; \
done
BOLT-INFO: Target architecture: x86_64
BOLT-INFO: BOLT version: 6a0964d75628b15bafd078342120888c0e6d126f
BOLT-INFO: first alloc address is 0x400000
BOLT-INFO: creating new program header table at address 0xa00000, offset 0x600000
BOLT-WARNING: debug info will be stripped from the binary. Use -update-debug-sections to keep it.
BOLT-INFO: enabling relocation mode
BOLT-INFO: forcing -jump-tables=move for instrumentation
BOLT-INFO: enabling lite mode
BOLT-INFO: 0 out of 7748 functions in the binary (0.0%) have non-empty execution profile
BOLT-INFO: validate-mem-refs updated 2 object references
BOLT-INSTRUMENTER: Number of indirect call site descriptors: 1995
BOLT-INSTRUMENTER: Number of indirect call target descriptors: 7719
BOLT-INSTRUMENTER: Number of function descriptors: 7719
BOLT-INSTRUMENTER: Number of branch counters: 150867
BOLT-INSTRUMENTER: Number of ST leaf node counters: 47195
BOLT-INSTRUMENTER: Number of direct call counters: 0
BOLT-INSTRUMENTER: Total number of counters: 198062
BOLT-INSTRUMENTER: Total size of counters: 1584496 bytes (static alloc memory)
BOLT-INSTRUMENTER: Total size of string table emitted: 166904 bytes in file
BOLT-INSTRUMENTER: Total size of descriptors: 10927480 bytes in file
BOLT-INSTRUMENTER: Profile will be saved to file /big/workspace/cpython/python.bolt
BOLT-INFO: 66759 instructions were shortened
BOLT-INFO: removed 84 empty blocks
BOLT-INFO: UCE removed 838 blocks and 51008 bytes of code
BOLT-INFO: padding code to 0x1600000 to accommodate hot text
BOLT-INFO: output linked against instrumentation runtime library, lib entry point is 0x18e0950
BOLT-INFO: clear procedure is 0x18dc390
BOLT-INFO: patched build-id (flipped last bit)
BOLT-INFO: setting _end to 0x190247c
BOLT-INFO: setting _end to 0x190247c
BOLT-INFO: setting __bolt_runtime_start to 0x18e0900
BOLT-INFO: setting __bolt_runtime_fini to 0x18e0950
BOLT-INFO: setting __hot_start to 0xc00000
BOLT-INFO: setting __hot_end to 0x14b3986
# Run instrumented binaries to collect data.
./python -m test --pgo --timeout=
...