From 0e1b778acf6dab2db1ebad5462ca265ed0e80a0b Mon Sep 17 00:00:00 2001
From: Dorit Nuzman <dorit@il.ibm.com>
Date: Thu, 27 Dec 2007 19:14:17 +0000
Subject: [PATCH] re PR tree-optimization/34591 (internal compiler error: in
 cost_for_stmt, at tree-vect-transform.c:98)

        PR tree-optimization/34591
        * tree-vect-trasnform.c (vect_estimate_min_profitable_iters): Skip
        stmts (including reduction stmts) that are not live.

From-SVN: r131206
---
 gcc/ChangeLog                       |  6 ++++++
 gcc/testsuite/ChangeLog             |  5 +++++
 gcc/testsuite/gcc.dg/vect/pr34591.c | 12 ++++++++++++
 gcc/tree-vect-transform.c           |  3 ++-
 4 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.dg/vect/pr34591.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 996e71584f8..8f4a3cf954b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-12-27  Dorit Nuzman  <dorit@il.ibm.com>
+
+	PR tree-optimization/34591
+	* tree-vect-trasnform.c (vect_estimate_min_profitable_iters): Skip
+	stmts (including reduction stmts) that are not live.
+
 2007-12-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/34281
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dd87ad99b7e..207325a9113 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2007-12-27  Dorit Nuzman  <dorit@il.ibm.com>
+
+	PR tree-optimization/34591
+	* gcc.dg/vect/pr34591.c: New test.
+
 2007-12-27  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR libfortran/34594
diff --git a/gcc/testsuite/gcc.dg/vect/pr34591.c b/gcc/testsuite/gcc.dg/vect/pr34591.c
new file mode 100644
index 00000000000..1f02544c844
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr34591.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+
+int av_resample(int filter_length, short *src, short *filter)
+{
+    int i;
+    int val=0;
+    for(i=0; i<filter_length; i++)
+      val += src[ i ] * filter[i];
+    return val;
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */
diff --git a/gcc/tree-vect-transform.c b/gcc/tree-vect-transform.c
index 6fe1d63aae6..352939f03b2 100644
--- a/gcc/tree-vect-transform.c
+++ b/gcc/tree-vect-transform.c
@@ -202,7 +202,8 @@ vect_estimate_min_profitable_iters (loop_vec_info loop_vinfo)
 	  stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
 	  /* Skip stmts that are not vectorized inside the loop.  */
 	  if (!STMT_VINFO_RELEVANT_P (stmt_info)
-	      && STMT_VINFO_DEF_TYPE (stmt_info) != vect_reduction_def)
+	      && (!STMT_VINFO_LIVE_P (stmt_info)
+		  || STMT_VINFO_DEF_TYPE (stmt_info) != vect_reduction_def))
 	    continue;
 	  scalar_single_iter_cost += cost_for_stmt (stmt) * factor;
 	  vec_inside_cost += STMT_VINFO_INSIDE_OF_LOOP_COST (stmt_info) * factor;
-- 
2.30.2