--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr46309.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,68 @@
+/* PR tree-optimization/46309 */
+/* { dg-do compile { target { { ! logical_op_short_circuit } || { mips*-*-* avr*-*-* } } } } */
+/* { dg-options "-O2 -fdump-tree-reassoc-details" } */
+/* The transformation depends on BRANCH_COST being greater than 1
+   (see the notes in the PR), so try to force that.  */
+/* { dg-additional-options "-mtune=octeon2" { target mips*-*-* } } */
+/* { dg-additional-options "-mbranch-cost=2" { target avr*-*-* s390*-*-* i?86-*-* x86_64-*-* } } */
+
+int
+f1 (int a)
+{
+  int v1 = (a == 3);
+  int v2 = (a == 1);
+  int v3 = (a == 4);
+  int v4 = (a == 2);
+  return v1 || v2 || v3 || v4;
+}
+
+int
+f2 (int a)
+{
+  int v1 = (a == 1);
+  int v2 = (a == 2);
+  int v3 = (a == 3);
+  int v4 = (a == 4);
+  return v1 || v2 || v3 || v4;
+}
+
+int
+f3 (int a)
+{
+  int v1 = (a == 3);
+  int v2 = (a == 1);
+  return v1 || v2;
+}
+
+int
+f4 (int a)
+{
+  int v1 = (a == 1);
+  int v2 = (a == 2);
+  return v1 || v2;
+}
+
+int
+f5 (unsigned int a)
+{
+  int v1 = (a <= 31);
+  int v2 = (a >= 64 && a <= 95);
+  return v1 || v2;
+}
+
+int
+f6 (unsigned int a)
+{
+  int v1 = (a <= 31);
+  int v2 = (a >= 64 && a <= 95);
+  int v3 = (a >= 128 && a <= 159);
+  int v4 = (a >= 192 && a <= 223);
+  return v1 || v2 || v3 || v4;
+}
+
+/* { dg-final { scan-tree-dump-times "Optimizing range tests a_\[0-9\]*.D. -.1, 1. and -.2, 2. and -.3, 3. and -.4, 4.\[\n\r\]* into" 2 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "Optimizing range tests a_\[0-9\]*.D. -.1, 1. and -.3, 3.\[\n\r\]* into" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "Optimizing range tests a_\[0-9\]*.D. -.1, 1. and -.2, 2.\[\n\r\]* into" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "Optimizing range tests a_\[0-9\]*.D. -.0, 31. and -.64, 95.\[\n\r\]* into" 2 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "Optimizing range tests a_\[0-9\]*.D. -.128, 159. and -.192, 223.\[\n\r\]* into" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "Optimizing range tests \[^\r\n\]*_\[0-9\]* -.0, 0. and -.128, 128.\[\n\r\]* into" 1 "reassoc2" } } */