[Bug rtl-optimization/64010] [msp430-elf] struct function dereference clobbers parameter passed to function

[nickc at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64010

--- Comment #3 from Nick Clifton <nickc at redhat dot com> ---
Hi Alex,

  This appears to be a reload bug.  Before reload we have:

(call_insn 12 (call:HI (mem:HI (mem:HI (plus:HI (reg:HI R14)
                                                (const_int 2))))
                       (const_int 0)) 

  After reload this becomes:

(insn 17 (set (reg:HI R14)
              (mem:HI (plus:HI (reg:HI R14)
                               (const_int 2)))))
(call_insn 12 (call:HI (mem:HI (reg:HI R14))
                       (const_int 0)))

  The uploaded patch fixes this but, not being a reload expert, I am not sure
if this is the correct way to solve the problem.  It also seems suspicious that
if this is a generic reload problem, then why has it not been reported and
fixed before now ?