From: Richard Guenther <rguenther@suse.de>
Date: Fri, 29 Jun 2012 14:27:24 +0000 (+0000)
Subject: re PR tree-optimization/47061 (VRP doesn't propagate through x<<=1, but it does for... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7211c82f34d7962c2af32da025aa55c4c858e528;p=gcc.git

re PR tree-optimization/47061 (VRP doesn't propagate through x<<=1, but it does for x*=2)

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 7fd300e3eee..556da4d6a1a 100644
--- 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
index 00000000000..2d1a2402995
--- /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" } } */