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refs #243: don't assume d0/d1/a0/a1 are free for interrupt handlers

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bebbo 2025-02-15 17:35:58 +01:00
parent 89bcf7ed10
commit c46b036845
1 changed files with 4 additions and 2 deletions
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6
gcc/bbb-opts.c
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@ -2475,8 +2475,10 @@ update_insn_infos (std::set<unsigned> & todo)
zz.or_def (ii);
}
/* always allow a0/a1, d0/d1. */
usable_regs = zz.get_def () | 0x303;
usable_regs = zz.get_def ();
/* always allow a0/a1, d0/d1 unless it's an interrupt handler */
if (m68k_get_function_kind (current_function_decl) != m68k_fk_interrupt_handler)
usable_regs |= 0x303;
usable_regs &= 0x7fff;
/* do not use global registers. */