https://bugzilla.suse.com/show_bug.cgi?id=1216000 https://bugzilla.suse.com/show_bug.cgi?id=1216000#c3 --- Comment #3 from Richard Biener <rguenther@suse.com> --- a simple testcase extern void abort (void); int __attribute__((noipa)) foo () { return 1; } int main() { int res = foo (); if (res != 0) abort (); } shows that EAX is overwritten in abort () itself: Watchpoint 3: $eax Old value = 1 New value = -966940928 0x00007ffff7e0128a in abort () from /lib64/libc.so.6 The main issue in this testcase (as well as in yours I guess) is that 'result' isn't used after the call so the compiler sees no need to preserve its value somewhere. -- You are receiving this mail because: You are on the CC list for the bug.