https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66666
--- Comment #7 from Mikael Pettersson <mikpelinux at gmail dot com> --- The test case in comment #0 stopped breaking on trunk with r221077, the fix for PR65236 (a gcc-5 IPA regression). Backporting r221077 to 4.9.3 unbreaks this test case there. However: - I can't get this test case to fail anywhere except on ARM (x86_64, sparc, m68k all work) - The PR65236 test case doesn't fail with 4.9.3 on ARM so I suspect a target-dependent issue here, and r221077 possibly just masks it.