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| author | Richard Stallman <rms@gnu.org> | 1993-06-14 08:47:36 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-06-14 08:47:36 +0000 |
| commit | dbf85761b58b9dcc84cc4c5bebe4f77d8140c097 (patch) | |
| tree | 2634d939c42b0806ed65312fa7b248f8d79cc567 /gcc | |
| parent | 2937cf8796f6713dd2ec10531838a3891f9c811a (diff) | |
| download | gcc-dbf85761b58b9dcc84cc4c5bebe4f77d8140c097.zip gcc-dbf85761b58b9dcc84cc4c5bebe4f77d8140c097.tar.gz gcc-dbf85761b58b9dcc84cc4c5bebe4f77d8140c097.tar.bz2 | |
(make_memloc): Don't reuse a memloc.
From-SVN: r4675
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/reload.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 08a21c6..868c967 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -3794,6 +3794,9 @@ find_reloads_toplev (x, opnum, type, ind_levels, is_set_dest) return x; } +/* Return a mem ref for the memory equivalent of reg REGNO. + This mem ref is not shared with anything. */ + static rtx make_memloc (ad, regno) rtx ad; @@ -3801,9 +3804,16 @@ make_memloc (ad, regno) { register int i; rtx tem = reg_equiv_address[regno]; + +#if 0 /* We cannot safely reuse a memloc made here; + if the pseudo appears twice, and its mem needs a reload, + it gets two separate reloads assigned, but it only + gets substituted with the second of them; + then it can get used before that reload reg gets loaded up. */ for (i = 0; i < n_memlocs; i++) if (rtx_equal_p (tem, XEXP (memlocs[i], 0))) return memlocs[i]; +#endif /* If TEM might contain a pseudo, we must copy it to avoid modifying it when we do the substitution for the reload. */ |