* loop.c (combine_movables): Turn off combination until

        move_movables validation bugs are fixed.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46995 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5a04aa8..56429ef 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2001-11-13  Richard Henderson  <rth@redhat.com>
+
+       * loop.c (combine_movables): Turn off combination until
+       move_movables validation bugs are fixed.
+
 2001-11-13  DJ Delorie  <dj@redhat.com>
 
        * config.gcc (powerpc|rs6000): Set default cpp options based

diff --git a/gcc/loop.c b/gcc/loop.c
index bc22852..adc4a0b 100644 (file)
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -1346,7 +1346,10 @@ combine_movables (movables, regs)
        /* We want later insns to match the first one.  Don't make the first
           one match any later ones.  So start this loop at m->next.  */
        for (m1 = m->next; m1; m1 = m1->next)
-         if (m != m1 && m1->match == 0
+         /* ??? HACK!  move_movables does not verify that the replacement
+            is valid, which can have disasterous effects with hard regs
+            and match_dup.  Turn combination off for now.  */
+         if (0 && m != m1 && m1->match == 0
              && regs->array[m1->regno].n_times_set == 1
              /* A reg used outside the loop mustn't be eliminated.  */
              && !m1->global