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tree-ssa-dom.c (record_equivalences_from_phis): Add a comment.

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* tree-ssa-dom.c (record_equivalences_from_phis): Add a
	comment.

From-SVN: r92091
This commit is contained in:
Kazu Hirata 2004-12-13 15:43:13 +00:00 committed by Kazu Hirata
parent 098b96ab3d
commit 6e38fea3e4
2 changed files with 6 additions and 1 deletions
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3
gcc/ChangeLog
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@ -3,6 +3,9 @@
* tree-ssa-dom.c (record_equivalences_from_phis): Speed up by
doing a pointer comparison.
* tree-ssa-dom.c (record_equivalences_from_phis): Add a
comment.
2004-12-13 Kazuhiro Inaoka <inaoka.kazuhiro@renesas.com>
* config/m32r/t-linux (SHLIB_MAPFILES): Add libgcc-glibc.ver to

4
gcc/tree-ssa-dom.c
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@ -1177,7 +1177,9 @@ record_equivalences_from_phis (basic_block bb)
{
tree t = PHI_ARG_DEF (phi, i);
/* Ignore alternatives which are the same as our LHS. */
/* Ignore alternatives which are the same as our LHS. Since
LHS is a PHI_RESULT, it is known to be a SSA_NAME, so we
can simply compare pointers. */
if (lhs == t)
continue;