1 files changed, 58 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp51.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp51.c
new file mode 100644
index 00000000000..66aa5ed6d6b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp51.c
@@ -0,0 +1,58 @@
+/* PR tree-optimization/28632 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vrp" } */
+
+void
+v4 (unsigned a, unsigned b)
+{
+  if (a < 0x1000) return;
+  if (a > 0x1000) return;
+  if (b < 0x0110) return;
+  /* constant true.  */
+  if (!__builtin_constant_p ((a|b) >= 0x01000))
+    __asm__("bug.always.true");
+  /* VRP must not think that this is constant.  */
+  if (__builtin_constant_p ((a|b) >= 0x10000))
+    __asm__("bug.not.always.true");
+}
+
+void
+u4 (unsigned n)
+{
+  if (n > 0x10111) return;
+  if (n < 0x10101) return;
+  /* always true.  */
+  if (!__builtin_constant_p (n & 0x00100))
+    __asm__("bug.always.true");
+  /* VRP must not think that this is constant true.  */
+  if (__builtin_constant_p (n & 0x00001))
+    __asm__("bug.not.always.true");
+  /* Out of range, always evaluates to constant false.  */
+  if (!__builtin_constant_p (n & 0x01000))
+    __asm__("bug.always.false");
+}
+
+void
+u5 (unsigned n)
+{
+  struct s {unsigned exp:8;} x;
+  x.exp = n;
+  if (__builtin_constant_p(((n + 1) & 255) > 1))
+    __asm__("bug.not.always.true");
+}
+
+void
+v5 (int a, int b)
+{
+  if (a < 0x1000) return;
+  if (a > 0x1000) return;
+  if (b < 0x0110) return;
+  /* constant true.  */
+  if (!__builtin_constant_p ((a|b) >= 0x01000))
+    __asm__("bug.always.true");
+  /* VRP must not think that this is always true.  */
+  if (__builtin_constant_p ((a|b) >= 0x10000))
+    __asm__("bug.not.always.true");
+}
+
+/* { dg-final { scan-assembler-not "bug\." } } */