From: Tom de Vries <tom@codesourcery.com>
Date: Tue, 5 Apr 2011 10:04:44 +0000 (+0000)
Subject: re PR target/43920 (Choosing conditional execution over conditional branches for... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2a562b0ab31fe77a48dcaca05d2e6d31c29bbeab;p=gcc.git

re PR target/43920 (Choosing conditional execution over conditional branches for code size in some cases.)

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 d9bc24e3e7f..6cde480d9d8 100644
--- 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 6178b59a7c4..112cb4907b4 100644
--- 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);