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reload_cse_simplify_operands


If I'm running into

  /* Figure out which alternative currently matches.  */
  if (! constrain_operands (1))
    fatal_insn_not_found (insn);

'insn does not satisfy its constraints'

By the way, the instruction is

(insn 325 31 44 0 (nil) (set (mem/s:DI (plus:SI (reg:SI 58 r58 [884])
                (symbol_ref:SI ("acpi_lr_stat"))) [7427 sec 0 space 0,
cmsmode 0 S8 A64])
        (reg:DI 56 r56)) 67 {*movdi} (nil)
    (nil))


Asking abstractly, does this mean that I need to support more
constraints in movdi, or does it mean that reload did something wrong?

Thanks,
- Hendrik


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