From 076ba1571553e691d508469376da0e6fbe32b6ee Mon Sep 17 00:00:00 2001
From: Richard Guenther <rguenther@suse.de>
Date: Fri, 16 Oct 2009 16:57:31 +0000
Subject: [PATCH] re PR tree-optimization/41728 (error: SSA name in freelist
but still referenced)
2009-10-16 Richard Guenther <rguenther@suse.de>
PR tree-optimization/41728
* tree-ssa-dom.c (optimize_stmt): Mark the stmt modified
if fold_stmt did anything.
* gcc.c-torture/compile/pr41728.c: New testcase.
From-SVN: r152910
---
gcc/ChangeLog | 6 ++++++
gcc/testsuite/ChangeLog | 5 +++++
gcc/testsuite/gcc.c-torture/compile/pr41728.c | 12 ++++++++++++
gcc/tree-ssa-dom.c | 1 +
4 files changed, 24 insertions(+)
create mode 100644 gcc/testsuite/gcc.c-torture/compile/pr41728.c
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3377560960aa..79cd10f3ba01 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-10-16 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/41728
+ * tree-ssa-dom.c (optimize_stmt): Mark the stmt modified
+ if fold_stmt did anything.
+
2009-10-16 Richard Guenther <rguenther@suse.de>
PR lto/41715
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 08f34e5c24f3..0f3e6a3b74a6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2009-10-16 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/41728
+ * gcc.c-torture/compile/pr41728.c: New testcase.
+
2009-10-16 Richard Guenther <rguenther@suse.de>
PR lto/41598
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr41728.c b/gcc/testsuite/gcc.c-torture/compile/pr41728.c
new file mode 100644
index 000000000000..df379d930108
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr41728.c
@@ -0,0 +1,12 @@
+int a[8];
+int s244(void)
+{
+ int lrc, j;
+ lrc = 0;
+ for (j=0; j<7; j++)
+ if(a[j] != a[j+1])
+ lrc = 1;
+ if (lrc != 0)
+ return 0;
+ return 1;
+}
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c
index 1e2c8f23ce81..6e861b15e4cf 100644
--- a/gcc/tree-ssa-dom.c
+++ b/gcc/tree-ssa-dom.c
@@ -2099,6 +2099,7 @@ optimize_stmt (basic_block bb, gimple_stmt_iterator si)
if (fold_stmt (&si))
{
stmt = gsi_stmt (si);
+ gimple_set_modified (stmt, true);
if (dump_file && (dump_flags & TDF_DETAILS))
{
--
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