re PR target/43920 (Choosing conditional execution over conditional branches for...

2011-04-05  Tom de Vries  <tom@codesourcery.com>

	PR target/43920
	* cfgcleanup.c (flow_find_cross_jump): Don't count USE or CLOBBER as
	insn.

From-SVN: r171976

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d9bc24e3e7fff13d549efd6a85539ec3e62e1708..6cde480d9d884f92f57ba989006e6a1557189fed 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-04-05  Tom de Vries  <tom@codesourcery.com>
+
+       PR target/43920
+       * cfgcleanup.c (flow_find_cross_jump): Don't count USE or CLOBBER as
+       insn.
+
 2011-04-05  Tom de Vries  <tom@codesourcery.com>
 
        * cfgcleanup.c (try_crossjump_bb): Remove 2 superfluous variables.

diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c
index 6178b59a7c47ff517df0066589887d8a21d47457..112cb4907b42ca320ce13329d2a37c8179e4f6e8 100644 (file)
--- a/gcc/cfgcleanup.c
+++ b/gcc/cfgcleanup.c
@@ -1070,6 +1070,7 @@ flow_find_cross_jump (basic_block bb1, basic_block bb2, rtx *f1, rtx *f2)
 {
   rtx i1, i2, last1, last2, afterlast1, afterlast2;
   int ninsns = 0;
+  rtx p1;
 
   /* Skip simple jumps at the end of the blocks.  Complex jumps still
      need to be compared for equivalence, which we'll do below.  */
@@ -1118,7 +1119,9 @@ flow_find_cross_jump (basic_block bb1, basic_block bb2, rtx *f1, rtx *f2)
 
          afterlast1 = last1, afterlast2 = last2;
          last1 = i1, last2 = i2;
-         ninsns++;
+         p1 = PATTERN (i1);
+         if (!(GET_CODE (p1) == USE || GET_CODE (p1) == CLOBBER))
+           ninsns++;
        }
 
       i1 = PREV_INSN (i1);