https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123958
--- Comment #7 from Roger Sayle <roger at nextmovesoftware dot com> --- Can someone re-run the bisect with -fdisable-tree-pow? The code in FMA to lower pow(x,2.0) to x*x has been broken since before my errno change. Indeed the FMA pass has been relying on x*x to have already been lowered by the expand_pow pass for sometime. The bit-rot that now generates bad PHIs could have been introduced, but been latent, for quite a while [POW conversion to FMA was introduced in 2019, but has been "vestigial"/unused since the expand_pow pass was added in 2022].
