https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67992
Jan Stancek <jan.stancek at gmail dot com> changed:
What |Removed |Added
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CC| |jan.stancek at gmail dot com
--- Comment #3 from Jan Stancek <jan.stancek at gmail dot com> ---
Created attachment 36992
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36992&action=edit
reproducer based off linux kernel fs/xfs/libxfs/xfs_sb.c
I came across this problem while running lcov on gcov enabled kernel. gcov is
really struggling with xfs_sb.c - it takes up to _36 hours_ to complete on
Intel Xeon CPUs.
I narrowed it down to following condition:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/fs/xfs/libxfs/xfs_sb.c?h=v4.4-rc4#n229
And based on that I made the attached reproducer. To reproduce run:
gcc -O2 -fprofile-arcs -ftest-coverage test1.c
./a.out
gcov -b -c -d -a test1.gcda
