[Bug tree-optimization/74585] SRA forces parameters to memory causing awful code generation

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=74585

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
That is, compare DECL_RTL for a in the good/bad case and see how it arrives so.