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| author | Bernd Schmidt <bernds@codesourcery.com> | 2010-10-19 00:24:36 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2010-10-19 00:24:36 +0000 |
| commit | 21016e43e2ead79d6dec8827a8c66339f467813b (patch) | |
| tree | 6999acbad04fe1f45049c9e3c40d68981df29d9f | |
| parent | 91d2ae685621582eb429f0b2d5a2277151d55121 (diff) | |
| download | gcc-21016e43e2ead79d6dec8827a8c66339f467813b.zip gcc-21016e43e2ead79d6dec8827a8c66339f467813b.tar.gz gcc-21016e43e2ead79d6dec8827a8c66339f467813b.tar.bz2 | |
re PR rtl-optimization/45966 (Incorrect combiner transformation.)
PR rtl-optimization/45966
* combine.c (try_combine): If added_sets_2, deal with the case
where i0 feeds i1 and i1 feeds i2.
From-SVN: r165674
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 2 |
2 files changed, 8 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9ee8309..f9eea06 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-10-18 Bernd Schmidt <bernds@codesourcery.com> + + PR rtl-optimization/45966 + * combine.c (try_combine): If added_sets_2, deal with the case + where i0 feeds i1 and i1 feeds i2. + 2010-10-18 Jan Hubicka <jh@suse.cz> * ipa.c (cgraph_externally_visible_p): Handle externally visible and diff --git a/gcc/combine.c b/gcc/combine.c index a5088b0f..556228f7 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3192,6 +3192,8 @@ try_combine (rtx i3, rtx i2, rtx i1, rtx i0, int *new_direct_jump_p) t = subst (t, i0dest, i0src, 0, 0); if (i1_feeds_i2_n) t = subst (t, i1dest, i1src, 0, 0); + if (i0_feeds_i1_n && i1_feeds_i2_n) + t = subst (t, i0dest, i0src, 0, 0); XVECEXP (newpat, 0, --total_sets) = t; } |