https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68771
--- Comment #16 from Daniel Vollmer <zerolo at gmail dot com> --- Created attachment 46038 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46038&action=edit reproducer for threading issue -fprofile-generate The attached example (see comments for command-lines) yields the following for me (on Darwin): > g++-7 -std=c++11 -fopenmp test.cpp -Ofast -flto -fprofile-generate > ./a.out > g++-7 -std=c++11 -fopenmp test.cpp -Ofast -flto -fprofile-use test.cpp: In function 'parallel(int)': test.cpp:24:1: error: corrupted profile info: profile data is not flow-consistent } ^ test.cpp:24:1: error: corrupted profile info: number of iterations for basic block 0 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of executions for edge 0-2 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of iterations for basic block 2 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of executions for edge 2-3 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of executions for edge 3-5 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of executions for edge 3-4 thought to be 3732 test.cpp:24:1: error: corrupted profile info: number of iterations for basic block 5 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of executions for edge 5-6 thought to be -2120 test.cpp:24:1: error: corrupted profile info: number of iterations for basic block 1 thought to be -2120 test.cpp: At top level: test.cpp:24:1: warning: Missing counts for called function parallel(int)/1216
