https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113534
Bug ID: 113534 Summary: printf might report segmentation fault under -mabi=ms Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: haochen.jiang at intel dot com Target Milestone: --- A reproducer: $ /export/users/haochenj/env/build_no_bootstrap_master/gcc/xgcc -B/export/users/haochenj/env/build_no_bootstrap_master/gcc/ /export/users/haochenj/src/gcc/master/gcc/testsuite/gcc.target/i386/pr80969-4a.c -m64 -DDEBUG -fdiagnostics-plain-output -Ofast -mabi=ms -mavx512f -lm -o ./pr80969-4a.exe $ ./pr80969-4a.exe Segmentation fault (core dumped) After I debug into that, where it core dumped is the "printf ("PASSED\n");" in avx-check.h. We got: Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7db887c in __strlen_evex () from /lib64/libc.so.6 It seems that the seg fault will only happen under -mabi=ms. If we eliminate -mabi=ms, no segmentation fault is detected.