[Bug backends/27925] riscv backend only provides return value locations for code compiled for LP64D ABI

[wilson at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27925

--- Comment #8 from Jim Wilson <wilson at gcc dot gnu.org> ---
Calling convention docs:
https://github.com/riscv-non-isa/riscv-elf-psabi-doc
Recently converted from markdown to asciidoc.  The releases link on the right
contains pdf files which are likely the easiest way to read this.

Yes, any float larger than the FP regs is passed in the integer regs.

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