PR tree-optimization/105820
gcc/testsuite/ChangeLog:
* g++.dg/tree-ssa/pr105820.c: New test.
--- /dev/null
+// { dg-do compile }
+// { dg-options "-O2 -fstrict-enums --param case-values-threshold=1"}
+
+typedef int basic_block;
+
+enum gimple_code {};
+
+struct omp_region {
+ omp_region *outer;
+ basic_block cont;
+};
+
+void
+oof (void);
+
+void
+build_omp_regions_1 (omp_region *parent, basic_block bb, gimple_code code)
+{
+ if (code == 2)
+ parent = parent->outer;
+ else if (code != 0)
+ parent->cont = bb;
+
+ if (parent)
+ oof ();
+}