2007-11-12 Richard Guenther <rguenther@suse.de>

	PR middle-end/34070
	* fold-const.c (fold_binary): If testing for non-negative
	operands with tree_expr_nonnegative_warnv_p make sure to
	use op0 which has all (sign) conversions retained.

	* gcc.c-torture/execute/pr34070-1.c: New testcase.
	* gcc.c-torture/execute/pr34070-2.c: Likewise.


git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@130098 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 26 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr34070-1.c b/gcc/testsuite/gcc.c-torture/execute/pr34070-1.c
new file mode 100644
index 00000000000..6589bb0c095
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr34070-1.c
@@ -0,0 +1,13 @@
+extern void abort (void);
+
+int f(unsigned int x)
+{
+    return ((int)x) % 4;
+}
+
+int main()
+{
+  if (f(-1) != -1)
+    abort ();
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr34070-2.c b/gcc/testsuite/gcc.c-torture/execute/pr34070-2.c
new file mode 100644
index 00000000000..4c1ce7b0231
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr34070-2.c
@@ -0,0 +1,13 @@
+extern void abort (void);
+
+int f(unsigned int x, int n)
+{
+    return ((int)x) / (1 << n);
+}
+
+int main()
+{
+  if (f(-1, 1) != 0)
+    abort ();
+  return 0;
+}