* loop.c (recombine_givs): Don't try to derive givs that have combined.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@24906 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3e9552c..476d746 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jan 29 22:34:41 1999  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+       * loop.c (recombine_givs): Don't try to derive givs that have combined.
+
 Fri Jan 29 15:00:39 1999  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
        * toplev.c (notice, fnotice): Check ANSI_PROTOTYPES, not __STDC__,

diff --git a/gcc/loop.c b/gcc/loop.c
index 11728f0..b0e7e87 100644 (file)
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -7272,16 +7272,13 @@ recombine_givs (bl, loop_start, loop_end, unroll_p)
          rtx sum;
 
          v = giv_array[stats[i].giv_number];
-         if (v->giv_type != DEST_REG || v->derived)
+         if (v->giv_type != DEST_REG || v->derived || v->same)
            continue;
          if (! last_giv)
            {
-             if (! v->same)
-               {
-                 last_giv = v;
-                 life_start = stats[i].start_luid;
-                 life_end = stats[i].end_luid;
-               }
+             last_giv = v;
+             life_start = stats[i].start_luid;
+             life_end = stats[i].end_luid;
              continue;
            }
          /* Use unsigned arithmetic to model loop wrap around.  */