2012-01-19 Richard Guenther <rguenther@suse.de>

	PR tree-optimization/37997
	* gcc.dg/tree-ssa/ssa-pre-28.c: New testcase.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@183297 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a0d5a19..2fe1ddd 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-01-19  Richard Guenther  <rguenther@suse.de>
+
+       PR tree-optimization/37997
+       * gcc.dg/tree-ssa/ssa-pre-28.c: New testcase.
+
 2012-01-19 Andrey Belevantsev <abel@ispras.ru>
 
        PR rtl-optimization/51505

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-28.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-28.c
new file mode 100644 (file)
index 0000000..3c27a1a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-28.c
@@ -0,0 +1,21 @@
+/* PR37997 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre-details" } */
+
+int foo (int i, int b, int result)
+{
+  int mask;
+  if (b)
+    mask = -1;
+  else
+    mask = 0;
+  result = i + 1;
+  result = result & mask;
+  return result;
+}
+
+/* We should insert i + 1 into the if (b) path as well as the simplified
+   i + 1 & -1 expression.  And do replacement with two PHI temps.  */
+
+/* { dg-final { scan-tree-dump-times "with prephitmp" 2 "pre" } } */
+/* { dg-final { cleanup-tree-dump "pre" } } */