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Re: [PATCH] var-tracking.c speedups
On Tue, 23 Jun 2009, Jakub Jelinek wrote:
> BTW, var-tracking.c calls rtx_equal_p in a weird way:
> if ((REG_P (vui[jj].lc->loc)
> && REG_P (node->loc)
> && REGNO (vui[jj].lc->loc) == REGNO (node->loc))
> || rtx_equal_p (vui[jj].lc->loc, node->loc))
> If that is because it doesn't care about REG mode, when it already knows
> that it is a REG it shouldn't call rtx_equal_p at all.
It has to ignore the mode. A hardreg contains some new value no matter
which mode it was in and no matter what mode the value currently in that