[Bug target/36043] gcc reads 8 bytes for a struct of size 6 which leads to sigsegv

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2008-04-25 15:43 -------
So, the problem is in move_block_to_reg that copies the argument piecewise
to regs like

  for (i = 0; i < nregs; i++)
    emit_move_insn (gen_rtx_REG (word_mode, regno + i),
                    operand_subword_force (x, i, mode));

not accounting for the fact that the last reg may be only partially filled
from the memory.  But the necessary information to deal with this is also
not available in this function currently.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36043