re PR tree-optimization/47061 (VRP doesn't propagate through x<<=1, but it does for...

2012-06-29  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47061
	* gcc.dg/tree-ssa/vrp71.c: New testcase.

From-SVN: r189076

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7fd300e3eeeb83cfa2c79fa96713f8035099da28..556da4d6a1a8a76003fff33eeb9b274ace2774a1 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-06-29  Richard Guenther  <rguenther@suse.de>
+
+       PR tree-optimization/47061
+       * gcc.dg/tree-ssa/vrp71.c: New testcase.
+
 2012-06-29  Richard Guenther  <rguenther@suse.de>
 
        PR tree-optimization/37541

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp71.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp71.c
new file mode 100644 (file)
index 0000000..2d1a240
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp71.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1" } */
+
+int foo(int *p)
+{
+  int x = -10;
+  if (p[0]) x++;
+  if (p[1]) x++;
+  if (p[2]) x++;
+  if (p[3]) x++;
+  x <<= 2;
+  return (x > 0);
+}
+
+int bar(char c)
+{
+  int i = c << 1;
+  return i > 1000;
+}
+
+/* { dg-final { scan-tree-dump-times "return 0;" 2 "vrp1" } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */