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loop.c (express_from): Make sure that when generating a PLUS of a PLUS...

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* loop.c (express_from): Make sure that when generating a PLUS of
        a PLUS, any constant expression appears on the outermost PLUS.

From-SVN: r23226
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Bernd Schmidt 1998-10-22 15:48:47 +00:00 • committed by Jeff Law
parent db1b5e8135
commit 86219cc76f
2 changed files with 17 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
Thu Oct 22 16:46:35 1998 Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>
* loop.c (express_from): Make sure that when generating a PLUS of
a PLUS, any constant expression appears on the outermost PLUS.
Thu Oct 22 15:46:23 1998 Per Bothner (bothner@cygnus.com)
* Makefile.in (distdir-cvs, distdir-start): Clean up so it

13
gcc/loop.c
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@ -6221,7 +6221,18 @@ express_from (g1, g2)
if (add == const0_rtx)
return mult;
else
return gen_rtx_PLUS (g2->mode, mult, add);
{
if (GET_CODE (add) == PLUS
&& CONSTANT_P (XEXP (add, 1)))
{
rtx tem = XEXP (add, 1);
mult = gen_rtx_PLUS (g2->mode, mult, XEXP (add, 0));
add = tem;
}
return gen_rtx_PLUS (g2->mode, mult, add);
}
}
/* Return an rtx, if any, that expresses giv G2 as a function of the register