Displaying 1 result from an estimated 1 matches for "f8c81503".
2020 Jul 16
2
[profile] Heads Up: Please Double Check the Instrument Level of Your PGO Profile Files
Hi All,
Recently we discovered a (hidden) performance bug that happened when you’re using Full LTO setup + BFD linker to compile first-stage PGO executables that were expected to generate IR level profile files. That is, compiling an executable using following commands:
```
clang -flto -fprofile-generate -c sample.c -o sample.c.bc.o
clang -flto sample.c.bc.o -o sample_exe -fprofile-generate
```