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rtlanal.c (subreg_get_info): Do not make register size computations for mode sizes not divisible by the... 

* rtlanal.c (subreg_get_info): Do not make register size
	computations for mode sizes not divisible by the number of
	registers.

From-SVN: r120119
This commit is contained in:
Joseph Myers 2006-12-21 20:58:57 +00:00 committed by Joseph Myers
parent 681150cdaa
commit 5f7fc2b832
2 changed files with 9 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2006-12-21 Joseph Myers <joseph@codesourcery.com>
* rtlanal.c (subreg_get_info): Do not make register size
computations for mode sizes not divisible by the number of
registers.
2006-12-21 Daniel Berlin <dberlin@dberlin.org>
* tree-ssa-structalias.c (build_constraint_graph): Insert complex

6
gcc/rtlanal.c
View File

@ -3028,12 +3028,12 @@ subreg_get_info (unsigned int xregno, enum machine_mode xmode,
/* If registers store different numbers of bits in the different
modes, we cannot generally form this subreg. */
if (!HARD_REGNO_NREGS_HAS_PADDING (xregno, xmode)
&& !HARD_REGNO_NREGS_HAS_PADDING (xregno, ymode))
&& !HARD_REGNO_NREGS_HAS_PADDING (xregno, ymode)
&& (GET_MODE_SIZE (xmode) % nregs_xmode) == 0
&& (GET_MODE_SIZE (ymode) % nregs_ymode) == 0)
{
regsize_xmode = GET_MODE_SIZE (xmode) / nregs_xmode;
gcc_assert (regsize_xmode * nregs_xmode == GET_MODE_SIZE (xmode));
regsize_ymode = GET_MODE_SIZE (ymode) / nregs_ymode;
gcc_assert (regsize_ymode * nregs_ymode == GET_MODE_SIZE (ymode));
if (!rknown && regsize_xmode > regsize_ymode && nregs_ymode > 1)
{
info->representable_p = false;