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-rw-r--r--gcc/testsuite/gcc.dg/pr28187.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr28187.c b/gcc/testsuite/gcc.dg/pr28187.c
new file mode 100644
index 0000000..bc3b62d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr28187.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-vrp -fwrapv" } */
+
+extern void bar(int);
+void checkgroups(int last, int verbose)
+{
+ int window = 0;
+ int outstanding = 0;
+ while (window < last || outstanding) {
+ while (outstanding < 47 && window < last) {
+ if (window < last) {
+ outstanding++;
+ if (verbose)
+ bar(window);
+ bar(window++);
+ }
+ }
+ if (outstanding > 0)
+ bar(0);
+ }
+}
+