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-rw-r--r--gcc/testsuite/gcc.dg/tree-ssa/pr21563.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr21563.c b/gcc/testsuite/gcc.dg/tree-ssa/pr21563.c
new file mode 100644
index 00000000000..b3c45886eb1
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr21563.c
@@ -0,0 +1,17 @@
+/* PR tree-optimization/21563
+ Make sure VRP folds the second "if" statement. */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-vrp-details" } */
+
+int
+foo (int a)
+{
+ if (a > 1)
+ if (a == 0)
+ return 1;
+ return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "Folding predicate" 1 "vrp"} } */
+/* { dg-final { cleanup-tree-dump "vrp" } } */