1 files changed, 38 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr16808.c b/gcc/testsuite/gcc.c-torture/compile/pr16808.c
new file mode 100644
index 000000000..28527de5d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr16808.c
@@ -0,0 +1,38 @@
+/* We used to ICE as we did not mark a Vop for rename as
+   we changed a function call to a normal modify statement
+   while folding exp(0.0); */
+
+double exp(double);
+void f0(void);
+void f(double);
+typedef struct Parser {
+    int x;
+    char *s;
+} Parser;
+static double pop(Parser *p) {
+    if (p->s[0] <= 0) {
+	f0();
+	return 0;
+    }
+    --p->x;
+    return 0;
+}
+static void evalFactor(Parser *p) {
+    while (p->x)
+	f(exp(pop(p)));
+}
+static void evalTerm(Parser *p) {
+    while (p->s[0])
+	evalFactor(p);
+}
+static void evalExpression(Parser *p) {
+    evalTerm(p);
+    while (p->s[0])
+	evalTerm(p);
+}
+void evalPrimary(Parser *p) {
+    if (p->s)
+	return;
+    evalExpression(p);
+}
+