2007-11-19 Richard Guenther <rguenther@suse.de>

	PR tree-optimization/34099
	* tree-ssa-ccp.c (likely_value): Exclude all but PLUS_EXPR,
	MINUS_EXPR and POINTER_PLUS_EXPR from handling as UNDEFINED
	if only one operand is undefined.

	* gcc.c-torture/execute/pr34099-2.c: New testcase.


git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@130289 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 47 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr34099-2.c b/gcc/testsuite/gcc.c-torture/execute/pr34099-2.c
new file mode 100644
index 00000000000..d335673e30f
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr34099-2.c
@@ -0,0 +1,47 @@
+int test1 (int b, int c)
+{
+  char x;
+  if (b)
+    return x / c;
+  else
+    return 1;
+}
+int test2 (int b, int c)
+{
+  int x;
+  if (b)
+    return x * c;
+  else
+    return 1;
+}
+int test3 (int b, int c)
+{
+  int x;
+  if (b)
+    return x % c;
+  else
+    return 1;
+}
+int test4 (int b, int c)
+{
+  char x;
+  if (b)
+    return x == c;
+  else
+    return 1;
+}
+
+extern void abort (void);
+int main()
+{
+  if (test1(1, 1000) != 0)
+    abort ();
+  if (test2(1, 0) != 0)
+    abort ();
+  if (test3(1, 1) != 0)
+    abort ();
+  if (test4(1, 1000) != 0)
+    abort ();
+  return 0;
+}
+