https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94852
--- Comment #4 from Ivan Sorokin <vanyacpp at gmail dot com> --- (In reply to Richard Biener from comment #1) > @item -ffloat-store > @opindex ffloat-store > Do not store floating-point variables in registers, and inhibit other > options that might change whether a floating-point value is taken from a > register or memory. > > I think it does what it says? Yes, the behavior of the compiler and the documentation matches very well. The compiler works as intended. My report is not about a bug, but about a possible improvement. If ignoring or implementing a warning is considered undesirable, I would suggest expanding the documentation by clarifying the interaction between -ffloat-store and -mfpmath=sse. Something like this in the documentation would help: "If used together with -mfpmath=sse, -ffloat-store doesn't change the results of floating point operations. The only effect it has is severely pessimizing the generated code."
